Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

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34118 Publications

Anwendungen der Rossendorfer Kernmikrosonde als Schwerionenmikroskop

Herrmann, F.; Grambole, D.

  • Lecture (others)
    Arbeitstreffen Forschung mit nuklearen Sonden und Ionenstrahlen, Leipzig, 5. - 7. Okt. 1998

Permalink: https://www.hzdr.de/publications/Publ-2585
Publ.-Id: 2585


Ion beam synthesis of nanocrystals in SiO2: experiments, modeling and computer simulations

Heinig, K.-H.

  • Lecture (others)
    Vanderbilt University, Nashville, TN, USA, June 29, 1998

Permalink: https://www.hzdr.de/publications/Publ-2584
Publ.-Id: 2584


Ion beam synthesis of nanocrystals - fundamentals and experiments

Heinig, K.-H.

  • Lecture (others)
    Oak Ridge National Laboratory, Solid State Division, Oak Ridge, TN, USA, June 26, 1998

Permalink: https://www.hzdr.de/publications/Publ-2583
Publ.-Id: 2583


Nanokristalle: Ein neues Material der Opto- und Halbleiterelektronik?

Heinig, K.-H.

  • Lecture (others)
    Physikalisches Institut der Universität Kaiserslautern, Jan. 19, 1998

Permalink: https://www.hzdr.de/publications/Publ-2582
Publ.-Id: 2582


Verschleißfester Edelstahl durch Plasmaimmersions-Ionenimplantation

Günzel, R.

  • Lecture (others)
    Robert Bosch AG, Crailsheim, March 9, 1998

Permalink: https://www.hzdr.de/publications/Publ-2581
Publ.-Id: 2581


In-situ -Ionenstrahlanalytik während der Ionenstrahlmodifikation dünner Schichten

Grötzschel, R.

  • Lecture (others)
    ETH Zürich, 9.6.1998

Permalink: https://www.hzdr.de/publications/Publ-2580
Publ.-Id: 2580


Hochtemperatur-Implantation von Diamant

Fontaine, F.; von Borany, J.

  • Lecture (others)
    2. Statusseminar zum BMBF-Verbundprojekt 'Sensorcluster für extreme Umgebungsbedingungen', Fernuniversität Hagen, 2./3. Juni 1998

Permalink: https://www.hzdr.de/publications/Publ-2579
Publ.-Id: 2579


Charakterisierung leerstellenartiger Defekte in ionenimplantiertem SiC mit Positronen

Brauer, G.

  • Lecture (others)
    FZ Rossendorf, Zentrumsseminar, 10.12.1998

Permalink: https://www.hzdr.de/publications/Publ-2578
Publ.-Id: 2578


Comparative study of ion implanted SiC by slow positron implantation and Rutherford backscattering/ channeling spectroscopies

Brauer, G.

  • Lecture (others)
    Texas Christian University (Department of Physics), Ft. Worth/TX, 02.11.1998
  • Lecture (others)
    University of Texas at Arlington (Physics Department), Arlington/TX, 03.11.1998

Permalink: https://www.hzdr.de/publications/Publ-2577
Publ.-Id: 2577


Uranium(VI) Sorption onto Phyllite and Selected Minerals in the Presence of Humic Acid

Schmeide, K.; Pompe, S.; Bubner, M.; Heise, K. H.; Bernhard, G.; Nitsche, H.

We studied the influence of humic acid (HA) on the uranium(VI) sorption onto the rock material phyllite and onto its main mineralogical constituents quartz, muscovite, chlorite, and albite at an ionic strength of 0.1 M in the pH range of 3.5 to 9.5 under aerobic conditions. The uranium(VI) concentration was 1·10-6 M and the HA concentration was 5 and 60 mg/L, respectively. The mass loading was 12.5 g/L. Furthermore, we studied the uranium and HA sorption on ferrihydrite (3·10-4 M Fe) and compared the results to the sorption behavior of phyllite. The study showed that the uranium sorption onto phyllite and onto its mineralogical constituents is influenced by the pH-dependent sorption behavior of the HA. Due to high HA sorption onto the solids in the acidic pH range the uranium uptake is enhanced compared to the uranium uptake in the absence of HA. A high concentration of dissolved HA in the near-neutral pH range may reduce the uranium sorption due to formation of aqueous uranyl humate complexes. Furthermore, we could show that the high uranium and HA sorption on phyllite is primarily caused by minor amounts of the secondary mineral ferrihydrite that is formed due to weathering of phyllite. Thus, the ferrihydrite predominates the contributions of the main minerals quartz, muscovite, chlorite, and albite, that are naturally present in the rock material phyllite.

Keywords: Humic acid; Uranium; Sorption; Phyllite; Muscovite; Albite; Quartz; Ferrihydrite

  • Radiochimica Acta 88, 723-728 (2000)

Permalink: https://www.hzdr.de/publications/Publ-2576
Publ.-Id: 2576


Institute of Bioinorganic and Radiopharmaceutical Chemistry; Report January 1998 - Juni 1999

Johannsen, B.; Seifert, S.

FOREWORD

  • Open Access Logo Wissenschaftlich-Technische Berichte / Forschungszentrum Rossendorf, FZR-270 September 1999
    ISSN: 1437-322X

Downloads:

Permalink: https://www.hzdr.de/publications/Publ-2575
Publ.-Id: 2575


Nanoscale Precipitates in VVER-440-type Reactor Pressure Vessel Steels after Irradiation and Annealing

Böhmert, J.; Große, M.; Ulbricht, A.

The microstructural evolution of reactor pressure vessel (RPV) steel effected by neutron irradiation is not yet sufficiently understood. The issue, however, is highly relevant for a safe operation of nuclear power plants (NPP).
Investigations have been performed by the methods of analytical high-resolution transmission electron microscopy (AHRTEM), the small angle neutron scattering (SANS) and the anomalous small angle X-ray scattering (ASAXS). The materials selected represent two different state-of-the-art products of VVER-type RPV steels.
One material is typical for the first VVER-440/230 generation and has a quite high content of impurities. The second material consists of surveillance specimens manu factured by Skoda Pilsen for the VVER 440/213 NPP in Paks (Hungary). The materials were irradiated to fluences of 7 to 14x1023 n/m2 (E > 1 MeV) within a high flux channel of the VVER prototype VVER-2 in Rheinsberg (Germany), or in the surveillance position of the Paks NPP, respectively. Whereas the detection of irradiation-induced precipitates by AHRTEM was not successful in every case, SANS showed an increase in the scattering intensity after irradiation, which could be interpreted as caused by a bimodal size distribution of irradiation-induced precipitates. A high first peak of the distribution appears at a radius of the precipitates of 1 to 2 nm. This peak disappears after annealing and is especially high but also thermally unstable for charges with high copper content. ASAXS measu rements prove that these precipitates are vanadium rich. There is a clear correlation between the integral of the sieze distribution within the range of the first peak of the distribution curve and the hardness. The correlation is independent of the treatment or the fluence. This shows the fine-dispersed nano-scale precipitates are the reason of the irradiation hardening.

  • Lecture (Conference)
    Third International Ural Seminar, Radiation Damages Physics of Metals and Alloys, Abstracts, 21-27 February 1999, Snezhinsk, Russia, p. 32
  • Contribution to proceedings
    Third International Ural Seminar, Radiation Damages Physics of Metals and Alloys, Abstracts, 21-27 February 1999, Snezhinsk, Russia, p. 32

Permalink: https://www.hzdr.de/publications/Publ-2574
Publ.-Id: 2574


Einfluss von Seigerungen in dickwandigen Teilen aus Druckbehälterstählen auf die Zähigkeitskennwerte

Böhmert, J.; Müller, G.; Viehrig, H.-W.

In dickwandigen Teilen aus den Druckbehälterstählen ASTM A533 B Cl. 1, 15CrMoV2 und 15CrNiMo2 wurde die Tiefenlagenabhängigkeit der Zähigkeit mit Kerbschlagbie geversuchen und mit quasistatischen 3-Punkt-Biegeversuchen an ermüdungsangeris senen Proben in Charpy-V-Geometrie nach dem ¿master curve¿-Konzept nach Wallin bestimmt. In bestimmten Tiefenbereichen treten Anomalien im Verlauf der Tiefenlagenabhängigkeit der mit den genannten Methoden ermittelten Übergangstemperaturen auf. Eine eingehendere Analyse zeigt, dass die Streuungen in den Zähigkeitskennwerten bimodal verteilt sind. Als Ursache werden Seigerungslinien ausgewiesen, in denen vorzugsweise der Kohlenstoffgehalt angereichert ist. Als Folge dessen entsteht in diesem Bereichen ein deutlich härteres, martensitisches Gefüge.
Die Lage der Linien relativ zur Rissspitze bestimmt die Bruchzähigkeit und damit die Referenztemperatur To nach dem ¿master curve¿-Konzept. Im Charpy-Kerbschlagbie geversuche ist eine derartige eindeutige Zuordnung nicht nachzuweisen.

  • Poster
    Tagung "Gefüge und Bruch", Internationale Werkstoffprüftagung, 17.-19. März 1999, Bochum, Vortrag Nr. 19
  • Contribution to proceedings
    Tagung "Gefüge und Bruch", Internationale Werkstoffprüftagung, 17.-19. März 1999, Bochum, Vortrag Nr. 19

Permalink: https://www.hzdr.de/publications/Publ-2573
Publ.-Id: 2573


Anlagentechnik für die Plasmaimmersions-Ionenimplantation

Günzel, R.

  • Lecture (others)
    Anwenderforum AWS, Meisdorf, December 12, 1998

Permalink: https://www.hzdr.de/publications/Publ-2572
Publ.-Id: 2572


Irradiation-induced structural changes in surveillance material of VVER 440-type weld metal

Große, M.; Denner, V.; Böhmert, J.; Mathon, M.-H.

The irradiation-induced microstructural changes in surveillance materials of the VVER
440-type weld metal Sv-10KhMFT were investigated by small angle neutron scattering
(SANS) and anomalous small angle X-ray scattering (SAXS). Due to the high fluence
a strong effect was found in the SANS experiment. No significant effect of the irradiationis detected by SAXS. The reason of this discrepancy is the different
scattering contrast of irradiation-induced defects for neutron and X-rays. An analysis
of the small angle X-ray scattering shows that the scattering intensity is mainly caused by vanadium-containing precipitates and grain boundaries. Both types of scattering defects are hardly changed by irradiation. Neutron irradiation rather produces additional scattering defects of few nanometers in size. Assuming these defects are clusters containing copper and other foreign atoms with a composition according to results of atom probe field ion microscopy investigations, both the high SANS and the low SAXS effect can be explained.

  • Journal of Nuclear Materials 277 (2000) 280-287

Permalink: https://www.hzdr.de/publications/Publ-2571
Publ.-Id: 2571


Möglichkeiten der Röntgenuntersuchungen an Wafern in Rossendorf und an der ESRF

Eichhorn, F.; Matz, W.; Prokert, F.

  • Lecture (others)
    WACKER Siltronic, Burghausen, 14.10.1998

Permalink: https://www.hzdr.de/publications/Publ-2570
Publ.-Id: 2570


Characterization of vacancy-type defects in ion implanted SiC by positron annihilation spectroscopy

Brauer, G.

  • Lecture (Conference)
    University of the Witwatersrand (Schonland Research Centre for Nuclear Sciences), Johannesburg, 12.01.1998

Permalink: https://www.hzdr.de/publications/Publ-2569
Publ.-Id: 2569


Miniaturisiertes Analysesystem für die Gewässerüberwachung

von Borany, J.; Cabaleiro, S.

  • Lecture (others)
    Abschlußseminar zum SMWA-Verbundprojekt; Dresden, 30. 06.1998
  • Other report
    Abschlußbericht zum SMWA-Verbundprojekt, FKZ: 42-4333.16, June 1998

Permalink: https://www.hzdr.de/publications/Publ-2568
Publ.-Id: 2568


Electrical and microstructural effects in highly doped 6H-SiC after Al-implantation

Wirth, H.; Panknin, D.; Perez-Rodriguez, A.; Brauer, G.; Anwand, W.; Voelskow, M.; Skorupa, W.

  • Lecture (Conference)
    40th Electronic Materials Conference (EMC´98), Charlottesville, Virginia, USA, June 24-26, 1998

Permalink: https://www.hzdr.de/publications/Publ-2567
Publ.-Id: 2567


Neutron Spectrum Covariances and their Influence on Results of Pressure Vessel Neutron Spectrum Adjustments

Böhmer, B.; Manturov, G.

  • Voprosy Atomnoi Nauki i Techniki, Seriya Jadernye Konstanty, 1998, Vypusk 1, p. 28-34, Ed. ZNIIatominform, Moscow

Permalink: https://www.hzdr.de/publications/Publ-2566
Publ.-Id: 2566


Spatial distribution of gettering centres in ion-implanted and annealed silicon

Kögler, R.; Eichhorn, F.; Mücklich, A.; Skorupa, W.; Danilin, A. B.

  • Lecture (Conference)
    11th. Int. Conf. on Ion Beam Modification of Materials, Amsterdam, The Netherlands, Aug. 31 - Sept. 4, 1998

Permalink: https://www.hzdr.de/publications/Publ-2565
Publ.-Id: 2565


SANS Investigations of the Microstructure of VVER-440-Type RPV Steel after Low Temperature Irradiation at 60 grd C

Grosse, M.; Böhmert, J.; Gilles, R.

  • Journal of Nuclear Materials 254 (1998) 143-150

Permalink: https://www.hzdr.de/publications/Publ-2564
Publ.-Id: 2564


MHD turbulence measurements in a sodium channel flow exposed to a transverse magnetic field

Eckert, S.; Gerbeth, G.; Witke, W.; Langenbrunner, H.

The knowledge about properties of the anisotropic turbulence in liquid metal flows exposed to an external magnetic field is essential for several technological applications such as the concept of a self-cooled liquid metal blanket for thermonuclear fusion reactors or the electromagnetic brake in metallurgical processes, but also of basic interest for turbulence research. Flow arameters like pressure drop and heat transfer rate are essentially determined by the interaction between the external magnetic field and the liquid metal flow. Several experimental studies [1-3] revealed that the application of a magnetic field leads not exclusively to a suppression of the turbulent perturbations. Velocity fluctuations remain and demonstrate a distinct anisotropy of the MHD turbulence showing a tendency to become two-dimensional. The properties of the local mass transfer are strongly
governed by the anisotropic character of the flow [4,5]. In this context a number of questions arises regarding the origin, the decay time or the size of the turbulent elements. A typical feature of the two-dimensional turbulence is that the energy becomes concentrated in organised large scale fluctuations. This fact ensures an intensive heat transfer on longer distances. Because of the anisotropy of the electromagnetic dissipation term vortices will be scarcely damped over long distances if their axes are aligned with the magnetic field lines [6]. For practical applications it is important to identify possibilities to promote the formation of such quasi-two-dimensional vortices in order to control the heat or mass transfer rate of the flow. It is well-known that the mentioned perturbations can be generated by rather specific means, for example, mechanical inserts or electrical currents between definitely arranged electrodes, etc..
In our experiments we force the turbulence intensity by mechanical means employing a grid of cylindrical bars or flat stripes. Due to the favourable material properties of the used liquid sodium we are able to extend the measurements into the region of high interaction parameters. In this way the obtained results complement the already existing knowledge about the two-dimensional MHD turbulence. The results concerning the measured turbulence intensity as a function of the interaction parameter N and the corresponding power spectral densities will be presented. Electrical potential probes were used to determine the velocity fluctuations. The measurements took place in two different test sections allowing either the variation of the axial distance between the turbulence promoter and the probe or the installation of special channel inserts in order to suppress the generation of the M-profile of the local velocity and to decrease the wall conductance ratio. The results obtained in both test sections will be compared and the influence of the altered boundary conditions onto the turbulent structure of the flow will be discussed.

  • Lecture (Conference)
    International Symposium on Turbulence, Heat and Mass Transfer, Nagoya, Japan, April 3-6, 2000

Permalink: https://www.hzdr.de/publications/Publ-2563
Publ.-Id: 2563


Improvement of the high temperature oxidation resistance of Ti50Al via ion implantation

Hornauer, U.; Richter, E.; Wieser, E.; Möller, W.

  • Lecture (Conference)
    11th Int. Conf. on Ion Beam Modification of Materials, Amsterdam, the Netherlands, Aug. 31 - Sept. 4, 1998

Permalink: https://www.hzdr.de/publications/Publ-2562
Publ.-Id: 2562


Gettering of iron and oxygen at cavities formed by helium ion implantation in Czochralski and float-zone silicon

Kaschny, J. R.; Fichtner, P. F. P.; Yankov, R. A.; Fukarek, W.; Mücklich, A.; Kreißig, U.; Peeva, A.; Danilin, A. B.; Skorupa, W.

  • Lecture (Conference)
    E-MRS´98, Strasbourg, June 16-19, 1998

Permalink: https://www.hzdr.de/publications/Publ-2561
Publ.-Id: 2561


Stabilizing the direct melt extraction of intermetallic fibres by magnetic fields

Cramer, A.; Gerbeth, G.; Bojarevics, A.; Gelfgat, Y.

In the direct melt extraction process a quickly rotating wheel draws fibres out of a liquid metal pool which may contain any pure metal or alloy. One common application of such fibres is the production of highly porous metallic substrates, which, in the case of Ni-Al is ideally suited to serve as a highly heat- and corrosion-resistant catalyst carrier. But this demands the fibres to have diameters in the range of 50 to 100 microns and a small width distribution of their cross section. The main limitations of this process are due to turbulence within the melt and a wavy motion on the surface which both inhibit to fulfil these requirements.
Many patents are concerned with the stabilisation of the melt pool or at least of the contact region between metal surface and the extraction wheel. They propose submersing mechanical parts directly into, or placing them at least in close vicinity to the melt to avoid the non-stationary conditions produced by the turbulence within the liquid metal pool. Even made of heat resistant ceramics they suffer from corrosion or cracks and do not work reliable at all. The present work describes a non invasive control mechanism by means of magnetic fields of different strength and orientation. They can be applied either globally to damp the flow within the whole melt volume or locally to the meniscus region where the fibre is formed, to reach higher Lorentz forces in this very sensitive region. Model experiments (In-Ga-Sn, liquid at room temperature; no extraction) with global stabilisation were carried out to study the calm down of the turbulent surface of an inductively stirred melt. In a second setup the influence of this globally applied field on the fibres have been investigated (low melting Sn-Pb). Though the otherwise wavy surface was damped down to a nearly mirror-like plane the goal of significant smaller fibre cross-section was not reached by the global stabilisation alone. The clearly observable positive tendency towards smaller fibres is presently investigated with two series of model experiments with local stabilisation. The smaller volume which needs to be magnetised allows for a 5 times stronger field which can be achieved either by rare earth permanent magnets or a concentration of the globally applied field with magnetic field guides.

  • Lecture (Conference)
    The 3rd International Symposium on Electromagnetic Processing of Materials (EPM2000) April 3-6 / Nagoya, Japan, Published by: The Iron and Steel Institute of Japan, pp 147-152
  • Contribution to proceedings
    The 3rd International Symposium on Electromagnetic Processing of Materials (EPM2000) April 3-6 / Nagoya, Japan, Published by: The Iron and Steel Institute of Japan, pp 147-152

Permalink: https://www.hzdr.de/publications/Publ-2560
Publ.-Id: 2560


Characterization of vacancy-type defects in Al+ and N+ co-implanted SiC by slow positron implantation spectroscopy (SPIS)

Anwand, W.; Brauer, G.; Coleman, P. G.; Yankov, R. A.; Skorupa, W.

  • Lecture (Conference)
    30th Polish Seminar on Positron Annihilation, Jarnoltowek, Sept. 17-21, 1998
  • Lecture (Conference)
    8th Int. Workshop on Slow Positron Beam Techniques for Solids and Surfaces (SLOPOS-8), Cape Town, Sept 6 - 12, 1998
  • Applied Surface Science 149 (1999) 140-143

Permalink: https://www.hzdr.de/publications/Publ-2559
Publ.-Id: 2559


Instabilities of electromagnetically levitated bodies and its prevention

Priede, J.; Gerbeth, G.; Mikelsons, A.; Gelfgat, Y.

Electromagnetic levitation is a well-known technique for containerless processing of metals and alloys both in the solid and in the molten state. In experiments the levitated bodies often times show different types of instabilities resulting in a rotating and oscillating motion of the sample. In the paper we analyze the physical reasons for such spontaneous instabilities, and conclude on possible measures against it. The first type of instability considered is that due to possible coupling between the electric current passing through the magnetic system and the variation of position of the levitated body. It is shown that oscillatory motion of the body may be unstable if the electric power supply regime permits the electric current passing through the magnetic system to vary depending on its effective inductance. Another type of instabilities may occur because of the coupling between the motion of the body and the electric currents induced in the body itself. This effect may cause a spontaneous spin-up of the spherical body, occuring if the magnetic field frequency exceeds a certain critical threshold depending on the configuration of the field. It is shown that this type of linear instability may be completely suppressed by imposing a steady magnetic field of a strength comparable to that of the oscillating one. As a third type of instability we consider small vibrations of the spherical body occuring due to the finite diffusion time of the magnetic field into the body resulting in a delay of the induced currents with respect to the body position. Again, such vibrations may occur if the non-dimensional field frequency exceeds some specific threshold. This threshold and the
underlaying mechanism will be explained. The theoretical predictions are verified by model experiments using solid Al or Mg spheres. These instabilities can obviously be avoided by system parameters below the corresponding non-dimensional reshold. If this is not possible in reality, an active damping method using DC magnetic fields has been developed, too. The DC field can either be produced by permanent magnets or by an electromagnetic superposition to the levitation coils. Experiments will be shown demonstrating the stabilization effect due to the DC magnetic fields.

  • Lecture (Conference)
    The 3rd International Symposium on Electromagnetic Processing of Materials (EPM2000) April 3-6 / Nagoya, Japan, Published by: The Iron and Steel Institute of Japan, pp 352-357
  • Contribution to proceedings
    The 3rd International Symposium on Electromagnetic Processing of Materials (EPM2000) April 3-6 / Nagoya, Japan, Published by: The Iron and Steel Institute of Japan, pp 352-357

Permalink: https://www.hzdr.de/publications/Publ-2558
Publ.-Id: 2558


A New Criterion for the Bubble Slug Transition in Vertical Tubes

Krüssenberg, A.-K.; Prasser, H.-M.; Schaffrath, A.

Vertical two-phase flow is normally classified into the four basic flow regimes bubble, slug, churn and annular flow. The transition between the different flow regimes does not occur suddenly and many extensions of this classification can be found in literature. For the prediction of flow patterns empirical and theoretical flow pattern maps have been developed.
A new criterion is presented for the transition between bubble and slug flow which is based on local instantaneous conductivity measurements with a wire mesh sensor (1 kHz that means 1000 frames per second, 242 measuring points in a tube cross section area). The high resolution allows the calculation of particle size distributions.
The transition from homogeneous bubble flow to heterogeneous bubble flow is indicated by the appearance of a bimodal bubble size distribution. If the equivalent bubble diameter exceeds the tube diameter the transition from bubble to slug flow occurs. The new criterion is compared with different empirical (Govier & Aziz, Weisman & Kang) and theoretical flow maps (Taitel, Bornea & Dukler, Ishii & Mishima) and shows a good agreement.

Keywords: Bubble Size Distribution; Bubble Slug Flow Transition Criteria

  • Kerntechnik 65/1 (2000) 7-13
  • Contribution to external collection
    NURETH-9, San Francisco, California, USA, October 3-8, 1999

Permalink: https://www.hzdr.de/publications/Publ-2557
Publ.-Id: 2557


Numerical Simulation of the Emergency Condenser of the SWR1000

Krepper, E.; Schaffrath, A.; Aszódi, A.

The SWR1000 is a new innovative boiling water reactor concept, which is developed by Siemens AG. This concept is characterized in particular by passive safety systems (e.g. four emergency condensers, four building condensers, eight passive pressure pulse transmitters, six gravity-driven core flooding lines). In the framework of BWR Physics and Thermohydraulic Complementary Action (BWR-CA) to the EU BWR R&D Cluster emergency condenser tests were performed by Forschungszentrum Jülich at the NOKO test facility. In this paper post test calculations with ATHLET are presented, which aim at the determination of the removable power of the emergency condenser and its operation mode. The 1D thermal-hydraulic code ATHLET was extended by the module KONWAR for the calculation of the heat transfer coefficient during condensation in horizontal tubes. In addition, results of CFD-calculations using the code CFX-4 are presented, which investigate the natural convection during the heat up process at the secondary side of the NOKO test facility.

Keywords: BWR; emergency condenser; condensation inside horizontal tubes; natural convection; CFD

  • Kerntechnik 64 (1999) 5-6, p. 243-252

Permalink: https://www.hzdr.de/publications/Publ-2556
Publ.-Id: 2556


ROBL (German Beamline) on BM20: Structural and radiochemical investigations

Matz, W.; Schell, N.; Funke, H.; Bernhard, G.

  • ESRF- Newsletter 30 (1998) 45

Permalink: https://www.hzdr.de/publications/Publ-2554
Publ.-Id: 2554


Rossendorfer Beamline an der ESRF

Matz, W.

  • Phys. Bl. 54 (1998) Nr. 9, 785

Permalink: https://www.hzdr.de/publications/Publ-2553
Publ.-Id: 2553


Investigation of liquid metal two phase flow characteristics by means of local resistivity probes and X-ray screening technique

Eckert, S.; Gerbeth, G.; Guttek, B.; Stechemesser, H.; Lielausis, O.

In many technologies such as the refinement of metallic melts the injection of gas bubbles is used to drive some liquid motion, enhance transport processes or to control the rate of chemical reactions. The resulting flow structure strongly depends on two phase flow parameters such as bubble size, bubble distribution or the local void fraction. Magnetic fields can be used to control the characteristics of a liquid metal bubbly flow.
We present experimental investigations of the bubble formation in heavy liquid metals as well as the influence of external magnetic fields on the turbulent dispersion of gas bubbles and the slip ratio in liquid metal bubbly flows, respectively.

a) Bubble formation
If gas bubbles are injected into a liquid metal characterised by a large surface tension one should be care to get a good wetting between the fluid and the surface of the gas injector. Otherwise, the gas would try to spread out along this interface to form gas layers. A control of the bubble size and formation rate becomes difficult. The comparison between experiment and theoretical models describing bubble formation processes requires an ideal wetted gas injector.
The bubble formation in mercury and the eutectic alloy InGaSn has been studied by means of several methods of gas injection, for instance through single orifices or injectors made from sintered metals with a mean porosity of a few microns. X-ray measurements have been used to directly observe the resulting gas bubbles rising in the liquid metal. In the case of an single orifce the influence of electromagnetic forces on the bubble frequency has been demonstrated.

b) Turbulent bubble dispersion, slip ratio
The transport properties of small argon bubbles have been studied in turbulent upwards channel flows of sodium and mercury. The bubbles were injected by a single orifice located in the centre of the channel cross section. After a distinct distance the local void fraction and the bubble velocity has been measured by means of electrical resistivity probes. The flow has been exposed to external magnetic fields directed transverse or longitudinal to the mean flow direction.
We will present and discuss measuring results showing the effect of the magnetic field strength and direction on the horizontal gas distribution and the ratio between gas and liquid velocity.

Keywords: two-phase flow; bubbly regime; liquid metals; void fraction measurements; electric resistivity probe; X-ray imaging

  • Lecture (Conference)
    International Workshop on Measuring Techniques for Liquid Metal Flows (MTLM), Dresden, October 11-13, 1999

Permalink: https://www.hzdr.de/publications/Publ-2552
Publ.-Id: 2552


Local velocity measurements in high temperature liquid metals by means of mechano-optical probes

Eckert, S.; Witke, W.; Pisseloup, L.; Gerbeth, G.

Model experiments are an important tool to understand the details of the flow structure and the transport properties of
flows occurring in real-scale metallurgical facilities as well as to validate the multitude of numerical codes for flow
simulation. Generally, water experiments are often performed to characterise the flow. Nevertheless, due to the large
differences of material properties like density, heat conductivity, surface tension or electrical conductivity the use of liquid
metals has clearly to be preferred if heat transfer phenomena, two-phase flows or the influence of electromagnetic fields
on the flow should be investigated. The application of suitable alloys with low melting points, for instance PbBi (Tm = 125
°C) or InGaSn (Tm = 5...10 °C), makes such kind of experiments very flexible and offers the ability to measure the
essential flow quantities like velocity, pressure or void fraction.

In this lecture we want to discuss a novel sensor which has been developed by the Rossendorf group to measure the local
velocities in opaque liquid flows. The measuring principle is based on the separation of a direct mechanical interaction
between flow and sensor tip and the optical acquisition and processing of the signal. In principle, this fact allows the
extension of the range of applicability to higher temperatures. Furthermore, the insensitivity of the system to electrical
noise and external magnetic fields can be considered as an important advantage. Until now, the sensor has been tested in
metallic melts up to temperatures of about 350 °C . In principle, an extension of the range of application up to
temperatures of about 1100 °C should be possible by the utilisation of quartz glass as material for the sensitive sensor tips.
The first sensors have been manufactured and tested with low temperature melts.

We present measurements of the local velocity obtained in an eutectic InGaSn melt driven by a rotating magnetic field.
The interest is focussed on geometry and parameters relevant for crystal growth technologies and mixing processes in
metallurgical applications, respectively. Measured profiles of the azimuthal velocity have been obtained at different
frequencies and field amplitudes.

Keywords: flow measurement technique; fluid velocity; mechano-optical principle; local sensor; liquid metals; rotating magnetic field

  • Lecture (Conference)
    International Workshop on Measuring Techniques for Liquid Metal Flows (MTLM) , Dresden, October 11-13, 1999

Permalink: https://www.hzdr.de/publications/Publ-2551
Publ.-Id: 2551


Reaktorsicherheitsforschung im Institut für Sicherheitsforschung des Forschungszentrums Rossendorf

Weiß, F.-P.; Rohde, U.; Prasser, H.-M.; Altstadt, E.; Böhmert, J.; Böhmer, B.; Carl, H.

Das Institut für Sicherheitsforschung ist eines von fünf wissenschaftlichen Instituten des Forschungszentrums Rossendorf e. V. (FZR). Die Rossendorfer Sicherheitsforschung baut auf langjährige Erfahrungen zur Analyse von Druckwasserreaktoren des russischen WWER-Types auf. WWER-Reaktoren nehmen bis heute einen wichtigen Platz im Spektrum des Institutes ein. So unterstützt das Institut im Rahmen eines Programmes des Bundesministeriums für Umwelt, Naturschutz, und Reaktorsicherheit die ukrainische Atomaufsichtsbehörde beim Aufbau einer modernen KKW-Überwachung. Inzwischen hat das Institut ebenso Kompetenz zur Sicherheitsforschung für westliche Leichtwasserreaktoren aufgebaut und kooperiert mit deutschen, europäischen und amerikanischen Forschungseinrichtungen und der Industrie.
Die Schwerpunkte der Sicherheitsforschung in Rossendorf liegen auf der Modellierung thermohydraulischer Phänomene bei unterstellten Störfallabläufen, der Reaktorphysik und dem Strahlungstransport und dem Verhalten von Komponenten und Materialien.
Der erste Teil des Forschungsberichtes beschäftigt sich ausschließlich mit den thermohydraulischen Arbeiten des Institutes wie den Vermischungsvorgängen im Primärkreis bei Borverdünnungs- und Kaltwassertransienten sowie der Modellentwicklung für transiente Zweiphasenströmungen. Für die thermohydraulischen Arbeiten hat das Institut ein 1:5 Modell eines deutschen DWR aufgebaut, die Experimente werden mit CFD-Codes (Computational Fluid Dynamics) nachgerechnet.

  • atw 44. Jg. (1999) Heft 6 - Juni, S. 348

Permalink: https://www.hzdr.de/publications/Publ-2550
Publ.-Id: 2550


Measuring techniques for model experiments in liquid metal alloys

Eckert, S.; Witke, W.; Gerbeth, G.

Model experiments are an important tool to understand the details of the flow structure and the transport properties of flows occurring in real-scale metallurgical facilities as well as to validate the multitude of numerical codes for flow simulation. The application of suitable alloys with low melting points, for instance PbBi (T = 125 °C) or InGaSn (T = 5...10 °C), guarantees realistic flow parameters and also offers the ability to measure essential flow quantities like velocity, pressure or void fraction. Two approaches will be discussed to measure the local velocities in opaque liquid flows such as liquid metals: a mechano-optical sensor and the ultrasonic Doppler method, respectively. Today, with respect to problems like high temperatures or material compatibility both techniques reveal severe limitations considering velocity measurements in liquid steel or aluminium, however, their reliability at moderate temperatures has been demonstrated. Here, we present velocity measurements obtained by means of both methods for the case of a cylinder filled with an eutectic InGaSn melt driven by a rotating magnetic field.

Keywords: flow measurement technique; fluid velocity; mechano-optical principle; ultrasonic Doppler method; liquid metals; rotating magnetic field

  • Lecture (Conference)
    EPM2000, The 3rd International Symposium on Electromagnetic Processing of materials, April 3-6, Nagoya, Japan, Published by: The Iron and Steel Institute of Japan, pp. 43-48
  • Contribution to proceedings
    EPM2000, The 3rd International Symposium on Electromagnetic Processing of materials, April 3-6, Nagoya, Japan, Published by: The Iron and Steel Institute of Japan, pp. 43-48

Permalink: https://www.hzdr.de/publications/Publ-2549
Publ.-Id: 2549


Comparative Study of Methods to Estimate Elastic-Plastic Dynamic Fracture Initiation Toughness

Richter, H.

There has not yet been generally accepted single specimen technique in order to obtain dynamic fracture mechanical parameters. A potential candidate could be the measurement of the acoustic emission (AE). Previous investigations showed that characteristic AE signals appears in the vicinity of crack initiation for the first time. With a specially developed measuring arrangement the method could be compared with simultaneously measuring additional physical parameters at specimens of strongly different levels of toughness and strength. Furthermore the results could be verified by the results of multiple specimens technique. With this technique the dynamic crack resistance curve was determined and the physical crack initiation toughness was deduced by measurement of the stretch zone width. To realize the idea the inverted impact pendulum developed and installed by VTT Espoo/Finland was modified with an AE transducer and a magnetic emission (ME) probe. The inverted impact pendulum design reduces the inertia and oscillation effects in the recorded load curve and allows to measure the crack opening (COD) by a laser scattering light method. In this way, at the same specimen crack opening displacement (COD), AE, and ME could be measured.
Neither of the three single specimen methods can directly detect crack initiation. Except the lower shelf region, were only a tiny amount of ductile crack growth occurs before cleavage, the stable crack initiation could be proven by AE and COD. Good agreement between initiation parameters based on SZW and AE was found for all toughness levels. In some cases a strong scattering of toughness parameters was, however, observed and the ranking did not correspond. COD indicates crack initiation after an amount of macroscopic stable crack growth, which is small but cannot be ignored. The correlation to the SZW is not independent of the toughness; for steels with high toughness the correlation is unsatisfied. Eventually, ME does not reflect stable crack initiation and growth.
Obviously, the physical connection between crack initiation and AE cannot be revealed. The AE method has been proved as very sensible for microscopically active processes, which coincide spatially and chronologically with ductile crack initiation. Thus, it is appropriate to estimate the dynamic fracture mechanical parameter "crack initiation toughness" better than other recently applied methods.

  • Lecture (Conference)
    Beitrag zu European Conference Junior Euromat‘98, 7.-11.9.1998, Lausanne, Switzerland, p. 333
  • Contribution to proceedings
    Beitrag zu European Conference Junior Euromat‘98, 7.-11.9.1998, Lausanne, Switzerland, p. 333

Permalink: https://www.hzdr.de/publications/Publ-2548
Publ.-Id: 2548


TRIDYN-Computersimulationen zur Schicht-Deposition von BN und zur Hochdosisimplantation in Si

Schwieger, T.

  • Other report
    Friedrich-Schiller-Universität Jena, April 1997

Permalink: https://www.hzdr.de/publications/Publ-2547
Publ.-Id: 2547


Synthese schwermetallionensensitiver Membranen für ISFETs mittels Ionenimplantation

Möller, D.

  • Other report
    TU Dresden, July 1997

Permalink: https://www.hzdr.de/publications/Publ-2546
Publ.-Id: 2546


Crystal-GRID: Eine neue nukleare Sonde zur Untersuchung atomarer Bewegung im Festkörper

Jentschel, M.

  • Other report
    TU Dresden, April 1997

Permalink: https://www.hzdr.de/publications/Publ-2545
Publ.-Id: 2545


Defect engineering and prevention of imurity gettering in ion implanted silicon

Kögler, R.; Peeva, A.; Skorupa, W.; Kaschny, J.; Hutter, H.

Additional self-interstitials were introduced into the vacancy-rich depth range around half of the projected ion range of high energy ion implanted silicon in order to balance radiation induced excess vacancies. The trapping of Cu atoms was found to be not effected by this procedure. Additional interstitial loops were formed during annealing if the concentration of self-interstitials exceeded a certain threshold. These dislocation loops did not act as gettering centres for Cu atoms. The results obtained are not in agreement with the assumption that excess vacancies are the gettering centres for metal impurities like Cu. Instead, it may be assumed that small clusters of self-interstitials act as gettering centres.

Keywords: silicon; ion implantation; point defects; gettering; impurities

  • Solid State Phenom. 82-84, 399 (2001)
  • Lecture (Conference)
    Int. Autum Meeting Gettering an Defect Engineering in Semiconductor Technology, GADEST 2001, St. Tecla, Sept. 30- Oct. 3., 2001

Permalink: https://www.hzdr.de/publications/Publ-2544
Publ.-Id: 2544


Transport und Strukturmodifikation bei der Stickstoffimplantation in amorphen Kohlenstoff

Grigull, S.

  • Other report
    TU Dresden, July 1997

Permalink: https://www.hzdr.de/publications/Publ-2543
Publ.-Id: 2543


Morphologie, chemische Heterogenität und Lumineszenz von Zirkonen und ihre Bedeutung für petrogenetische Typologie und Genchronologie

Wolf, D.; Oberhänsli, R.; Grambole, D.; Gruner, T.

  • Other report
    DFG-Abschlußbericht zur Sachbeihilfe Wo 489/2 - 2

Permalink: https://www.hzdr.de/publications/Publ-2542
Publ.-Id: 2542


Entwicklung eines Permeable Base Transistors mit Kobaltdisilizid-Gate auf der Basis maskenloser Implantation mit feinfokussiertem Ionenstrahl

Teichert, J.; Hausmann, S.

  • Other report
    DFG-Te 250/1-1, Zwischenbericht, 12/97

Permalink: https://www.hzdr.de/publications/Publ-2541
Publ.-Id: 2541


Hochstromionenquelle für Dünnschichttechnologien

Siemroth, P.; Richter, E.; Schülke, T.; Witke, T.; Brückner, J.; Brutscher, J.

  • Other report
    SMWK 4-7541.83-IWS/504

Permalink: https://www.hzdr.de/publications/Publ-2540
Publ.-Id: 2540


Schlußbericht: Anwendungsgerechte Systemintegration und Zuverlässigkeit für die intelligente mikro-mechanische Sensorik (AN-SYS), Teilvorhaben: Silizium-Glas- und Silizium-Silizium-Bonden

Schmidt, B.; Lange, K.; Harz, M.; Nitsche, P.

  • Other report
    BMBF-Verbundprojekt, Förderkennzeichen 13 MV 0266, Mai 1997

Permalink: https://www.hzdr.de/publications/Publ-2539
Publ.-Id: 2539


Fluorine profiles in antarctic meteorites by nuclear reaction analysis

Noll, K.; Döbeli, M.; Tobler, L.; Grambole, D.; Krähenbühl, U.

  • Contribution to external collection
    Annual Report 1996, Labor f. Radio- u. Umweltchemie der Univ. Bern u. des PSI

Permalink: https://www.hzdr.de/publications/Publ-2538
Publ.-Id: 2538


Dotierte und undotierte Diamantfilme

Fontaine, F.; von Borany, J.; Heera, V.

  • Other report
    SMWK: 4-7531.50-03-IFW/602, Zwischenberichte 25.6.1997, 11.12.1997

Permalink: https://www.hzdr.de/publications/Publ-2537
Publ.-Id: 2537


Abschlußbericht zum Verbundprojekt "Strukturelle Ursachen und Mechanismen der bestrahlungsinduzierten Versprödung in Reaktordruckbehälterstählen"

Böhmert, J.; Brauer, G.

  • Other report
    Verbundprojekt Forschungsförderung SMWK 1994, 4-7541.83 - FZR/403 Berichtsdatum: 15.01.1997

Permalink: https://www.hzdr.de/publications/Publ-2536
Publ.-Id: 2536


Impurity gettering effects in separation-by-implanted-oxygen (SIMOX) structures: what getters what, where and how

Yankov, R. A.

  • Lecture (others)
    Bell Labs, Lucent Technologies, Murray Hill, NJ, USA, Dec. 8, 1997

Permalink: https://www.hzdr.de/publications/Publ-2535
Publ.-Id: 2535


A neural network approach for acoustic leak monitoring in the VVER440 pressure vessel head

Hessel, G.; Schmitt, W.; van der Vorst, K.; Weiß, F.-P.

A neural network approach has been developed for localizing leakages and estimating the leak rate in the VVER-440 pressure vessel head. Results are presented from experiments with simulated leaks. Three-layer perceptron networks were found to be best suited for leak localization and for the estimation of leak rates. However, the estimation of leak rates required an additional neural network because a different normalization procedure was necessary for extracting features from RMS values of the acoustic emission sensors. Perceptron networks with continuously valued outputs corresponding to the coordinates of the leak positions were useful for indentifying even leak positions which had not been offered during training.

Keywords: Leak; monitoring; neural networks; pressurized water reactors; VVER reactors

  • Progress in Nuclear Energy, Vol. 34, No. 3, pp. 173 - 183, 1999

Permalink: https://www.hzdr.de/publications/Publ-2534
Publ.-Id: 2534


Interaction of high-energy ion beams with silicon: buried layers, gettering and defect engineering

Yankov, R. A.

  • Lecture (others)
    VARIAN Company, Gloucester, MA, USA, Dec. 4, 1997

Permalink: https://www.hzdr.de/publications/Publ-2533
Publ.-Id: 2533


Proximity gettering of transition-metal impurities in separation-by-implanted-oxygen (SIMOX) structures using buried carbon- and helium-implanted layers

Yankov, R. A.

  • Lecture (others)
    Naval Res. Lab, Electronics Division, Washington D.C., USA, Nov. 26, 1997

Permalink: https://www.hzdr.de/publications/Publ-2532
Publ.-Id: 2532


Effekte bei der Implantationsdotierung von Bor und Aluminium in 6H-SiC

Wirth, H.

  • Lecture (others)
    Daimler-Benz-AG, FZ Frankfurt/M., Oct. 29, 1997

Permalink: https://www.hzdr.de/publications/Publ-2531
Publ.-Id: 2531


Verfahren zur Minimierung des Einflusses von Resonanzfluktuationen auf das Meßsignal bei Ultraschall-Durchschallungsuntersuchungen

Prasser, H.-M.; Hensel, F.; Schütz, P.

Das Patent beschreibt ein Verfahren zur Minimierung des Einflusses von Resonanzfluktuationen des Meßmediums bei Ultraschall-Durchschallungsuntersuchungen an in Rohrleitungen geführten Zwei- und Mehrphasenströmungen durch eine schnelle Variation der Arbeitsfrequenz des Senders der Meßeinrichtung.

Keywords: ultrasonic transmission measurement; wobbling; Wobbeln; Ultraschall-Transmissionsmessung

  • Patent
    DE 4333645 A1
  • Patent
    EP 0721572 B1

Downloads:

Permalink: https://www.hzdr.de/publications/Publ-2530
Publ.-Id: 2530


Using ANSYS/FLOTRAN® and CFX-4® for the solution of a mixed convection flow benchmark

Krepper, E.; Willschütz, H.-G.; Altstadt, E.; Weiß, F.-P.

For the design, optimisation and safety analysis of nuclear plants, the use of 1D system codes is state of the art. However, for the modelling of passive equipment the range of validity of the 1D-codes is exceeded, because in these structures 3D-flow phenomena are often dominating. The fast progress of the computer technique and of Computational-Fluid-Dynamics (CFD-) codes gives the opportunity, to apply CFD-codes to the assessment of the efficiency of those components. Most of these codes are based either on the finite-volume or the finite-element method.
Integrated simulation of thermo-hydraulic phenomena and the resulting thermo-mechanical loadings for the surrounding structures (e. g. the reactor pressure vessel) can be achieved using a finite-element-code like ANSYS/Multiphysics®. The finite volume code CFX® has been proven to be an appropriate tool for modelling of 3D single phase fluid phenomena.
The governing mechanism in passive components for decay heat removal is natural convection and heat transfer with internal heating. To assess the capability of both codes describing a mixed convection flow, post test calculations of an IAHR (International Association for Hydraulic Research) benchmark exercise were performed (Kamide et. al, 1991). The working fluid was water in the temperature range of 15 to 50°C at atmospheric pressures.
This paper presents a discussion of the problems and capabilities of each code to calculate complex flow regimes and temperature fields.

Keywords: buoyancy driven fluid flow; CFD post-test analysis; ANSYS/FLOTRAN; CFX-4; heat transfer; natural convection

  • Lecture (Conference)
    17. CAD-FEM Users´ Meeting, 6.-8. Oktober 1999, Sonthofen, Germany, Proceedings Paper No. I 2.4
  • Contribution to proceedings
    17. CAD-FEM Users´ Meeting, 6.-8. Oktober 1999, Sonthofen, Germany, Proceedings Paper No. I 2.4

Permalink: https://www.hzdr.de/publications/Publ-2529
Publ.-Id: 2529


Subthreshold Production of Kaons and Antikaons in Nucleus-Nucleus Collisions at Equivalent Beam Energies

Barth, R.; Senger, P.; Ahner, W.; Beckerle, P.; Bormann, C.; Brill, D.; Cieslak, M.; Debowski, M.; Grosse, E.; Koczon, P.; Kohlmeyer, B.; Miskowiec, D.; Müntz, C.; Oeschler, H.; Pühlhofer, F.; Schwab, E.; Schicker, R.; Shin, Y.; Speer, J.; Ströbele, H.; Sturm, C.; Völkel, K.; Wagner, A.; Walus, W.

  • Physical Review Letters, Volume 78, Number 21, 26 May 1997, 4007-4010

Permalink: https://www.hzdr.de/publications/Publ-2528
Publ.-Id: 2528


Enhanced Out-of-Plane Emission of K+ Mesons Observed in Au + Au Collisions at 1 A GeV

Shin, Y.; Ahner, W.; Barth, R.; Beckerle, P.; Brill, D.; Cieslak, M.; Debowski, M.; Grosse, E.; Koczon, P.; Kohlmeyer, B.; Mang, M.; Miskowiec, D.; Müntz, C.; Oeschler, H.; Pühlhofer, F.; Schwab, E.; Schicker, R.; Senger, P.; Speer, J.; Ströbele, H.; Sturm, C.; Völkel, K.; Wagner, A.; Walus, W.

  • Physical Review Letters, Volume 81, Number 8, 24 August 1998, 1576-1579

Permalink: https://www.hzdr.de/publications/Publ-2527
Publ.-Id: 2527


Ionenimplantation in 6H-SiC; Elektrische Untersuchungen und Sublimation

Wirth, H.

  • Lecture (others)
    Daimler-Benz-AG, FZ Frankfurt/M., Jan. 8, 1997

Permalink: https://www.hzdr.de/publications/Publ-2526
Publ.-Id: 2526


Bestimmung von Ni-Tiefenprofilen in Al und Aufklärung der Phasenbildung bei Ionenimplantation in Al

Wieser, E.

  • Lecture (others)
    Seminar des Sonderforschungsbereiches "Strukturbildung und Eigenschaften in Grenzschichten", Dresden, Nov. 20, 1997

Permalink: https://www.hzdr.de/publications/Publ-2525
Publ.-Id: 2525


Flüssigmetall-Ionenquellen und ihre Anwendung in Ionenfeinstrahlanlagen

Teichert, J.

  • Lecture (Conference)
    Univ. Magdeburg, Inst. f. experimentelle Physik, Nov. 27, 1997

Permalink: https://www.hzdr.de/publications/Publ-2524
Publ.-Id: 2524


Monte-Carlo and rate-equation simulations describing the evolution of nanoclusters in high-dose ion implantation

Strobel, M.

  • Lecture (others)
    Solid State Division, Oak Ridge National Laboratory, Oak Ridge, USA, Oct. 23, 1997

Permalink: https://www.hzdr.de/publications/Publ-2523
Publ.-Id: 2523


Medium Effects in Kaon and Antikaon Production in Nuclear Collisions at Subthreshold Beam Energies

Laue, F.; Sturm, C.; Böttcher, I.; Debowski, M.; Förster, A.; Grosse, E.; Koczon, P.; Kohlmeyer, B.; Mang, M.; Naumann, L.; Oeschler, H.; Pühlhofer, F.; Schwab, E.; Senger, P.; Shin, Y.; Speer, J.; Ströbele, H.; Surowka, G.; Uhlig, F.; Wagner, A.; Walus, W.

  • Physical Review Letters Volume 82, Number 8, 22 February 1999, 1640-1643

Permalink: https://www.hzdr.de/publications/Publ-2522
Publ.-Id: 2522


High energy implantation into silicon: Gettering and Defect Engineering

Skorupa, W.

  • Lecture (others)
    Bell Labs, Lucent Technologies, Murray Hill, NJ, USA, Dec. 8, 1997

Permalink: https://www.hzdr.de/publications/Publ-2521
Publ.-Id: 2521


Ion beam processing of Semiconductors: Research activities at the Forschungszentrum Rossendorf

Skorupa, W.

  • Lecture (others)
    VARIAN Company, Gloucester, MA, USA, Dec. 4, 1997

Permalink: https://www.hzdr.de/publications/Publ-2520
Publ.-Id: 2520


Blaue Lumineszenz hoher Intensität aus implantierten SiO2-Schichten: Nanocluster oder ....?

Skorupa, W.

  • Lecture (others)
    Innovationskolleg "Methoden und Materialsysteme für den Nanometerbereich", Institut für Physik, TU Chemnitz, Oct. 24, 1997

Permalink: https://www.hzdr.de/publications/Publ-2519
Publ.-Id: 2519


Strong blue photo-and electroluminescence from ion beam synthesized Ge-rich SiO2-layers

Skorupa, W.

  • Lecture (others)
    Dept. de Fisica Aplicada i Electronica, Univ.Barcelona, Spain, Nov. 11, 1997
  • Lecture (others)
    Naval Res. Lab, Electronics Division, Washington, D.C., USA, Nov. 26, 1997

Permalink: https://www.hzdr.de/publications/Publ-2518
Publ.-Id: 2518


Defectengineering and gettering by high energy implantation into Silicon

Skorupa, W.

  • Lecture (others)
    Center for Analysis of Substances, Moscow, Russia, May 26, 1997

Permalink: https://www.hzdr.de/publications/Publ-2517
Publ.-Id: 2517


Hochenergieimplantation in Silicium: Defekt-Engineering und Gettern

Skorupa, W.

  • Lecture (others)
    Institut für Physik, FSU Jena, May 16, 1997

Permalink: https://www.hzdr.de/publications/Publ-2516
Publ.-Id: 2516


Ionenstrahlmodifizierung von Halbleitermaterialien: Forschungsaktivitäten am Institut für Ionenstrahlphysik und Materialforschung

Skorupa, W.

  • Lecture (others)
    Vortrag zur Evaluierung durch den Wissenschaftlichen Beirat des FZR, Rossendorf, Apr. 29, 1997
  • Lecture (others)
    Treffen der Dresdener Forschungsinstitute mit der Sächsischen Industrie, Dresden, June 27, 1997

Permalink: https://www.hzdr.de/publications/Publ-2515
Publ.-Id: 2515


Verschleißschutz von Alumnium- und Magnesiumlegierungen durch Ionenimplantation

Richter, E.; Chudoba, T.; Wieser, E.

  • Lecture (others)
    Innovative Verfahren der Oberflächenvergütung von Leichtmetallen, Essen, June 5, 1997

Permalink: https://www.hzdr.de/publications/Publ-2514
Publ.-Id: 2514


Strong blue and violet light emission from silicon- and germanium-implanted silicon dioxide

Rebohle, L.

  • Lecture (others)
    Bell Labs, Lucent Technologies, Murray Hill, NJ, USA, Dec. 8, 1997

Permalink: https://www.hzdr.de/publications/Publ-2513
Publ.-Id: 2513


Erzeugung blauer Lumineszenz-Zentren in SiO2 durch Ionenstrahlsynthese

Rebohle, L.

  • Lecture (others)
    Vortrag zur Evaluierung durch den Wissenschaftlichen Beirat des FZR, Rossendorf, Apr. 4, 1997

Permalink: https://www.hzdr.de/publications/Publ-2512
Publ.-Id: 2512


Theoretische Beschreibung von Implantationsprozessen: Grundlagen, Methoden, Anwendungen

Posselt, M.

  • Lecture (Conference)
    Sommerschule "Nukleare Sonden und Ionen", Bad Blankenburg, Germany, Sept. 1-5, 1997

Permalink: https://www.hzdr.de/publications/Publ-2511
Publ.-Id: 2511


Recent positron annihilation studies of the CuMn-system

Nicht, E.-M.

  • Lecture (others)
    Lehrstuhl für Tieftemperaturphysik, Univ. Prag, Oct. 30, 1997

Permalink: https://www.hzdr.de/publications/Publ-2509
Publ.-Id: 2509


Ionenstrahlen in Forschung und Technik

Möller, W.

  • Lecture (others)
    Physikalisches Kolloquium des Inst. für Physikalische Hochtechnologie, Jena, June 4, 1997

Permalink: https://www.hzdr.de/publications/Publ-2508
Publ.-Id: 2508


Ion beam analysis in Europe and Germany

Möller, W.

  • Lecture (others)
    Univ. of Surrey, Dept. Electrica Engineering, Guildford, U.K., Feb. 4, 1997

Permalink: https://www.hzdr.de/publications/Publ-2507
Publ.-Id: 2507


Das Rossendorfer Strahlrohr ROBL an der ESRF

Matz, W.

  • Lecture (others)
    Zentrumsseminar FZR, Dec. 4, 1997

Permalink: https://www.hzdr.de/publications/Publ-2506
Publ.-Id: 2506


Synchrotronstrahlung: Eigenschaften, Quellen, Anwendungen

Matz, W.

  • Lecture (others)
    Zentrumsseminar FZR, Nov. 20, 1997

Permalink: https://www.hzdr.de/publications/Publ-2505
Publ.-Id: 2505


Der Materialforschungsmeßplatz der Rossendorfer Beamline an der Europäischen Synchrotronstrahlungs-quelle in Grenoble

Matz, W.

  • Lecture (others)
    TU Dresden, Institut für Kristallographie und Festkörperphysik, Nov. 11, 1997

Permalink: https://www.hzdr.de/publications/Publ-2504
Publ.-Id: 2504


Experimente der Materialforschung an ROBL

Matz, W.; Prokert, F.; Eichhorn, F.; Schell, N.; Betzl, M.

  • Lecture (others)
    Nutzertreffen ROBL, FZR, Rossendorf, June 19, 1997

Permalink: https://www.hzdr.de/publications/Publ-2503
Publ.-Id: 2503


ROBL: Strahlrohr und Experimentierausrüstung

Matz, W.

  • Lecture (others)
    Nutzertreffen ROBL, FZR, Rossendorf, June 19, 1997

Permalink: https://www.hzdr.de/publications/Publ-2502
Publ.-Id: 2502


Basics and applications of plasma immersion ion implantation

Mändl, S.

  • Lecture (others)
    University of Augsburg, Nov. 20, 1997

Permalink: https://www.hzdr.de/publications/Publ-2501
Publ.-Id: 2501


Plasma immersion ion implantation

Mändl, S.

  • Lecture (others)
    City University of Hongkong, Oct. 13, 1997

Permalink: https://www.hzdr.de/publications/Publ-2500
Publ.-Id: 2500


Defective zones in Si detected by means of metal gettering

Kögler, R.

  • Lecture (others)
    Univ. Barcelona, Dept. Fisica Aplicada i Electronica, Barcelona, Spain, Nov. 10, 1997

Permalink: https://www.hzdr.de/publications/Publ-2499
Publ.-Id: 2499


Detektion von Defektzonen in ionenimplantiertem Si

Kögler, R.

  • Lecture (others)
    MLU Halle-Wittenberg, FB Physik, Halle (Saale), Apr. 10, 1997

Permalink: https://www.hzdr.de/publications/Publ-2498
Publ.-Id: 2498


Theoretische Grundlagen der Ionenstrahlsynthese: Computersimulationen auf atomarer Ebene

Heinig, K.-H.

  • Lecture (others)
    Seminar an der TU Chemnitz, Chemnitz, Germany, May 13, 1997

Permalink: https://www.hzdr.de/publications/Publ-2497
Publ.-Id: 2497


Theoretische Grundlagen der Ionenstrahlsynthese: Beschreibungen basierend auf Ratengleichungen

Heinig, K.-H.

  • Lecture (others)
    Seminar an der TU Chemnitz, Chemnitz, Germany, May 6, 1997

Permalink: https://www.hzdr.de/publications/Publ-2496
Publ.-Id: 2496


Grundlagen der Synthese von Nanoclustern und dünnen Schichten mit Ionenstrahlen

Heinig, K.-H.

  • Lecture (others)
    Seminar am ISI des Forschungszentrum Jülich, Jülich, Germany, February 27, 1997

Permalink: https://www.hzdr.de/publications/Publ-2495
Publ.-Id: 2495


Implantations- und Ausheileffekte in SiC

Heera, V.

  • Lecture (others)
    Institutsseminar FWI-FZR, Rossendorf, June 5, 1997

Permalink: https://www.hzdr.de/publications/Publ-2494
Publ.-Id: 2494


Verschleißfester Edelstahl – ein Erfolg der Ionenstrahltechnik

Günzel, R.; Richter, E.

  • Lecture (others)
    Workshop "Werkstoffe innovativ", Hannovermesse 1997

Permalink: https://www.hzdr.de/publications/Publ-2493
Publ.-Id: 2493


Plasma source ion implantation in the Forschungszentrum Rossendorf: state of the art and recent developments

Günzel, R.

  • Lecture (others)
    IPR, Ghandinagar, March 18, 1997

Permalink: https://www.hzdr.de/publications/Publ-2492
Publ.-Id: 2492


Recent developments of in situ ion beam analysis at Rossendorf

Grötzschel, R.

  • Lecture (others)
    Faure, South Africa, Nov. 19, 1997

Permalink: https://www.hzdr.de/publications/Publ-2491
Publ.-Id: 2491


Grundlagen der Ionenstrahlanalytik

Grötzschel, R.

  • Lecture (others)
    TU Chemnitz, Graduiertenkolleg, Jan./Feb., 1997

Permalink: https://www.hzdr.de/publications/Publ-2490
Publ.-Id: 2490


Möglichkeiten der Oberflächenanalytik mit Ionenstrahlverfahren im Forschungszentrum Rossendorf

Grambole, D.

  • Lecture (others)
    TU Dresden, Inst. f. Werkstoffwissenschaften, Aug. 13, 1997

Permalink: https://www.hzdr.de/publications/Publ-2489
Publ.-Id: 2489


Ellipsometry as a diagnostic tool for thin film processing

Fukarek, W.

  • Lecture (others)
    Institute of Polymer Physics, Charles University Prague, Nov. 27, 1997

Permalink: https://www.hzdr.de/publications/Publ-2488
Publ.-Id: 2488


The Rossendorf electrostatic accelerator

Friedrich, M.

  • Lecture (others)
    SINR Shanghai, Dept. of Physics, P. R. China, April 17, 1997

Permalink: https://www.hzdr.de/publications/Publ-2487
Publ.-Id: 2487


Progress in the study of vacancy-type defects in ion implanted SiC by slow positron implantation spectroscopies

Brauer, G.

  • Lecture (others)
    Univ. of East Anglia (School of Physics), Norwich, Nov. 7, 1997

Permalink: https://www.hzdr.de/publications/Publ-2486
Publ.-Id: 2486


Positron studies of defects in ion-implanted and annealed SiC

Brauer, G.

  • Lecture (others)
    Lawrence Livermore National Lab, Physics and Space Technology, Livermore, USA, May 22, 1997

Permalink: https://www.hzdr.de/publications/Publ-2485
Publ.-Id: 2485


Ionenstrahlsynthese von Nanoclustern für elektrooptische Anwendungen

von Borany, J.

  • Lecture (others)
    1. Materialwissenschaftliche Tagung der WGL, Berlin, Oct. 14, 1997

Permalink: https://www.hzdr.de/publications/Publ-2484
Publ.-Id: 2484


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