Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

"Online First" included
Without submitted and only approved publications
Only approved publications

33168 Publications

Investigation of ion-implantation induced damage in 6H-SiC by RBS/C and Positron Annihilation Spectroscopy

Wirth, H.; Anwand, W.; Brauer, G.; Voelskow, M.; Panknin, D.; Skorupa, W.; Coleman, P. G.;
  • Lecture (Conference)
    Int. Conf. on Silicon Carbide, III-Nitrides and Related Materials, Stockholm, Sweden, Aug. 31 - Sept. 5, 1997

Permalink: https://www.hzdr.de/publications/Publ-2477
Publ.-Id: 2477


Synchrotron X-ray studies of AlGaAs/GaAs epitaxial layers implanted with Se ions

Wieteska, K.; Wierzchowski, W.; Turos, A.; Grötzschel, R.;
  • Lecture (Conference)
    4th Symp. on Synchrotron Radiation, Krakow, PL, 1997

Permalink: https://www.hzdr.de/publications/Publ-2476
Publ.-Id: 2476


Teilchenbeschleuniger - Grundlagen

Guratzsch, H.;
Ausgehend von der Wirkung elektischer und magnetischer Felder auf elektrisch geladene Teilchen, wie Elektronen und Ionen, wird die Funktion der Teilchenbeschleuniger erläutert. Auf die Analogie zwischen Lichtoptik und Elektronen- bzw. Ionenoptik wird bei der Betrachtung der Strahlführung hingewiesen. Wichtig für das Funktionieren eines Beschleunigers ist die korrekte Berücksichtigung der kinematischen Beziehungen zwischen Energie, Masse und Geschwindigkeit. Mit Hilfe von schematischen Darstellungen werden verschiedene Beschleunigertypen vorgestellt. Die Emission von Synchrotronstrahlung begrenzt bei Elektronen-Kreisbeschleunigern die praktisch erreichbare Energie. Der LEP-Ring im CERN erreicht mit 27 km Umfang eine Energie von 50 GeV. Für noch höhere Energien müssen Linearbeschleuniger gebaut werden. Am TESLA-Projekt für einen 33 km langen Elektronen-Positronen-Collider mit einer Energie im Wechselwirkungspunkt von 500 GeV wird im DESY Hamburg gearbeitet. Auf der Basis der supraleitenden TESLA-Beschleunigungsstrukturen wird derzeit im Forschungszentrum Rossendorf ein 40-MeV-Linearbeschleuniger für Elektronen aufgebaut. In Zukunft werden mit diesem Beschleuniger kern- und strahlungsphysikalische Forschungsarbeiten durchgeführt sowie kohärente Infrarotstrahlung (Freier-Elektronen-Laser) für materialwissenschaftliche Untersuchungen erzeugt.
Keywords: Beschleuniger, Elektronen, Ionen
  • Lecture (others)
    Lehrerfortbildung 1999 im Forschungszentrum Rossendorf, 26. August 1999

Permalink: https://www.hzdr.de/publications/Publ-2475
Publ.-Id: 2475


Blue photoluminescence from high-dose Si+- and Ge+-implanted silicon-dioxide layers

Tyschenko, I. E.; Kachurin, G. A.; Zhuravlev, K. S.; Pazdnikov, N. A.; Volodin, V. A.; Gutakovsky, A. K.; Leier, A. F.; Fröb, H.; Leo, K.; Böhme, T.; Rebohle, L.; Yankov, R. A.; Skorupa, W.;
  • Lecture (Conference)
    Int. Workshop des Innovationskollegs der TU Chemnitz "Methoden und Materialsysteme für den Nanometerbereich", Schöneck/Vogtl., March 3 - 5, 1997

Permalink: https://www.hzdr.de/publications/Publ-2474
Publ.-Id: 2474


A computational model of the formation of (SiC)1-x(AlN)x structures by hot, high-dose N+ and Al+ coimplants in 6H-SiC

Trushin, Y. V.; Yankov, R. A.; Kharlamov, V. S.; Kulikov, D. V.; Tsigankov, D. N.; Kreißig, U.; Voelskow, M.; Pezoldt, J.; Skorupa, W.;
  • Lecture (Conference)
    Int. Conf. on Silicon Carbide, III-Nitrides and Related Materials, Stockholm, Sweden, Aug. 31 - Sept. 5, 1997

Permalink: https://www.hzdr.de/publications/Publ-2473
Publ.-Id: 2473


Formation and self-organization of nanoclusters by ion beam synthesis: a combined atomistic and continuum description

Strobel, M.; Heinig, K.-H.; Möller, W.;
  • Lecture (Conference)
    MRS Fall Meeting, Boston, USA, Dec. 1-5, 1997

Permalink: https://www.hzdr.de/publications/Publ-2472
Publ.-Id: 2472


Computersimulationen zur Evolution von Nanoclustern

Strobel, M.; Heinig, K.-H.; Möller, W.;
  • Lecture (Conference)
    Frühjahrstagung der DPG, Münster, Germany, March 17-21, 1997

Permalink: https://www.hzdr.de/publications/Publ-2471
Publ.-Id: 2471


A comparative study of ERDA, EELS and XPS for structural analysis of amorphous carbon nitride films

Späth, C.; Kühn, M.; Richter, F.; Falke, U.; Hietschold, M.; Kilper, R.; Kreißig, U.;
  • Lecture (Conference)
    Int. Conf. Diamond '97

Permalink: https://www.hzdr.de/publications/Publ-2470
Publ.-Id: 2470


MeV-Implantation in Silicium

Skorupa, W.;
  • Lecture (Conference)
    20. Dt. Nutzertreffen Ionenimplantation, SIMEC-Werk der Siemens AG, Dresden, Oct. 29 -30, 1997

Permalink: https://www.hzdr.de/publications/Publ-2469
Publ.-Id: 2469


Composition, structural and hardeness change of aluminium implanted with carbon

Segrouchni, Z.; Betzl, M.; Richter, E.;
  • Lecture (Conference)
    SMMIB 97, Gatlinburg, TE, USA, Sept. 1997

Permalink: https://www.hzdr.de/publications/Publ-2468
Publ.-Id: 2468


Abscheidung von Si/SiO2-Cluster-Schichten durch reaktives Magnetron-Sputtern

Seifarth, H.; Grötzschel, R.; Markwitz, A.; Matz, W.; Nitsche, P.; Rebohle, L.;
  • Lecture (Conference)
    8. Bundesdeutsche Fachtagung Plasmatechnologie, Dresden, Sept. 14 - 17, 1997

Permalink: https://www.hzdr.de/publications/Publ-2467
Publ.-Id: 2467


Atomistic modeling of ion implantation within a 2d process simulator

Schmidt, B.; Posselt, M.; Strecker, N.; Feudel, T.;
  • Lecture (Conference)
    MRS Fall Meeting, Boston, USA, Dec. 1 - 5, 1997
  • Contribution to external collection
    Mat. Res. Soc. Symp. Proc. 490 (1998) 21

Permalink: https://www.hzdr.de/publications/Publ-2466
Publ.-Id: 2466


Applying ANSYS/Multiphysics to In-Vessel and Ex-Vessel Core Melt Phenomena

Willschütz, H.-G.;
For future nuclear power plants it is demanded that there are no consequences for the environment and the population even in the closest vicinity of the plant during and after every possible accident scenario. This includes the hypothetical scenario of a severe accident with subsequent core meltdown, corium relocation and formation of a melt pool with internal heat sources in the reactor pressure vessel (RPV) lower head (LH). Some reactor concepts have the aim to arrest the melt in the lower head removing the decay heat by external water flooding. In other concepts a dry reactor pit is designed and after the vessel failure a core catcher shall assure the long term stabilization of the corium within the containment.

For both strategies investigations on the transient behaviour of the RPV or of the core catcher are necessary. Two kinds of vessel failure can be distinguished: thermal and structural failure. Thermal failure means that the heat flux through the vessel wall becomes so high that the steel solidus temperature at any position of the vessel outside is exceeded. Structural failure means that a combination of thermal and mechanical loads causes the failure, e. g. the wall thickness of the vessel is reduced by thermal ablation and at the same time the internal pressure and the gravitational forces induce creeping with subsequent creep failure.

Different melt configurations can be assumed. They can be distinguished by the melt masses released into the LH, the melt composition, the segregation behaviour of the oxidic and the metallic component, and the density and the distribution of the internal heat sources. One of the most dangerous accident scenarios for a pressurized water reactor (PWR) assumes the relocation of a melt mass in the range of 200 Mg or more which is segregated into some 150 Mg of the heavier oxidic component at the bottom and some 50 Mg of a metallic melt above. The oxidic melt is surrounded by an oxidic crust due to the high solidification temperature of the oxide. The internal heat sources are mainly in the oxidic component, but due to the geometric configuration and the different fluid properties the highest heat fluxes and the major thermal ablation is expected between the metallic layer and the vessel wall. This phenomenon is called focussing effect.

An in-vessel-scenario of a PWR has been assumed and modelled with ANSYS/ Multiphysics. Using this Finite Element (FE) code package it is possible to simulate the velocity and temperature field for a fluid region and the corresponding temperature field within the surrounding solid structures. This thermo-fluiddynamic calculation can be coupled with a mechanical FE-model of the solid structures to analyse the stress and possible creeping forced by the mechanical and thermal loads. In this presentation, the recent modelling approach and the results obtained with the code ANSYS/Multiphysics are discussed. An outlook on the further development is given.

Keywords: Severe Accident, Core Meltdown, In-Vessel-Retention, Core Catcher, Finite Element Code, Transient Calculation, Computational Fluid Dynamics, Coupled Solid Structures, Thermal Failure, Structural or Creep Failure
  • Lecture (others)
    Seminar held at the Division of Nuclear Power Safety at the Royal Institute of Technology, Stockholm, Sweden, August 2nd, 1999.

Permalink: https://www.hzdr.de/publications/Publ-2465
Publ.-Id: 2465


Dünnschichtsysteme für die Photo- und Elektrolumineszenz

Schmidt, B.; von Borany, J.; Grötzschel, R.; Heinig, K.-H.; Markwitz, A.; Matz, W.; Nitzsche, P.; Rebohle, L.; Seifarth, H.; Strobel, M.; Skorupa, W.;
  • Lecture (Conference)
    Photonik-Symposium, Würzburg, Oct. 8 - 10, 1997

Permalink: https://www.hzdr.de/publications/Publ-2460
Publ.-Id: 2460


Influence of the substrate structure (SIMOX, bulk Si) on the SiC synthesis by high dose carbon implantation

Romano-Rodriguez, A.; Kögler, R.; Bachrouri, A.; Perez-Rodriguez, A.; Serre, C.; Reuther, H.; Voelskow, M.; Skorupa, W.; Calvo-Barrio, L.; Morante, J. R.;
  • Lecture (Conference)
    7th Int. Conf. on Gettering and Defect Engineering in Semiconductor Technology, GADEST'97, Spa, Belgium, Oct. 5-10, 1997

Permalink: https://www.hzdr.de/publications/Publ-2459
Publ.-Id: 2459


Nitrierung austenitischer Edelstähle mittels Plasma-Immersions-Ionenimplantation

Richter, E.;
  • Lecture (Conference)
    OWT-97, Chemnitz, June 16-18, 1997

Permalink: https://www.hzdr.de/publications/Publ-2458
Publ.-Id: 2458


The influence of heat treatment during the implantation of oxygen into magnesium

Richter, E.; Reuther, H.; Kreißig, U.;
  • Lecture (Conference)
    SMMIB 97, Gatlinburg, TE, USA, Sept. 1997

Permalink: https://www.hzdr.de/publications/Publ-2457
Publ.-Id: 2457


Investigation of Fe-Mg-alloys produced by ion implantation

Reuther, H.; Betzl, M.; Matz, W.; Richter, E.;
  • Lecture (Conference)
    10th Int. Conf. Surface Modification of Metals by Ion Beams, Gatlinburg, USA, Sept. 21 - 26, 1997

Permalink: https://www.hzdr.de/publications/Publ-2456
Publ.-Id: 2456


Angle dependent Mössbauer spectroscopy on beta-FeSi2 single crystals

Reuther, H.; Behr, G.; Dobler, M.; Teresiak, A.;
  • Lecture (Conference)
    Int. Conf. Appl. Mössbauer Effect, Rio de Janeiro, Brazil, Sept. 14 - 20, 1997

Permalink: https://www.hzdr.de/publications/Publ-2455
Publ.-Id: 2455


Alloying by high dose ion implantation of iron into magnesium and aluminium

Reuther, H.;
  • Invited lecture (Conferences)
    Int. Conf. Appl. Mössbauer Effect, Rio de Janeiro, Brazil, Sept. 14 - 20, 1997 (invited lecture)

Permalink: https://www.hzdr.de/publications/Publ-2454
Publ.-Id: 2454


XRS and TEM investigations on argon profiled metal-silicon thin films

Reiche, R.; Oswald, S.; Thomas, J.; Wetzig, K.; Reuther, H.; Dobler, M.;
  • Lecture (Conference)
    7th European Conf. Appl. Surf. Interface Analysis, Göteborg, Sweden, June 16 - 20, 1997

Permalink: https://www.hzdr.de/publications/Publ-2452
Publ.-Id: 2452


Erzeugung blauer Lumineszenzzentren durch Ionenstrahlsynthese

Rebohle, L.; Tyschenko, I. E.; Fröb, H.; Leo, K.; Yankov, R. A.; Skorupa, W.;
  • Lecture (Conference)
    DPG-Frühjahrstagung, Münster, March 17 - 21, 1997

Permalink: https://www.hzdr.de/publications/Publ-2451
Publ.-Id: 2451


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

Rebohle, L.; von Borany, J.; Grötzschel, R.; Markwitz, A.; Schmidt, B.; Tyschenko, I. E.; Skorupa, W.; Fröb, H.; Leo, K.;
  • Lecture (Conference)
    II. Int. Workshop on Light Emitting Low Dimensional Silicon Structures, Lagonissi-Attiki, Greece, June 23 - 25, 1997

Permalink: https://www.hzdr.de/publications/Publ-2450
Publ.-Id: 2450


Das ROBL-Strahlrohr an der ESRF: (Röntgenoptik und Strahlcharakteristika, der MRH-Meßplatz)

Prokert, F.; Betzl, M.; Eichhorn, F.; Matz, W.; Schell, N.;
  • Lecture (Conference)
    Workshop "Strukturanalyse von Kristalloberflächen und dünnen Schichten mit Synchrotronstrahlung", LMU München, Oct. 8 - 10, 1997

Permalink: https://www.hzdr.de/publications/Publ-2449
Publ.-Id: 2449


Modeling of implantation damage in silicon

Posselt, M.;
  • Invited lecture (Conferences)
    Int. Workshop on Challenges in Predictive Process Simulation (ChiPPS'97), Wandlitz, Germany, Aug. 17 - 20, 1997 (invited lecture)

Permalink: https://www.hzdr.de/publications/Publ-2448
Publ.-Id: 2448


Computer simulation of random-to-channeling and blocking-to-channeling transitions

Posselt, M.;
  • Invited lecture (Conferences)
    Workshop on Channeling and Blocking Effects with Heavy Ion Beams, München, Germany, April 18 - 19, 1997 (invited lecture)

Permalink: https://www.hzdr.de/publications/Publ-2447
Publ.-Id: 2447


Growth and characterization of boron nitride thin films

Plass, M. F.; Fukarek, W.; Kolitsch, A.; Möller, W.;
  • Lecture (Conference)
    SMMIB 97, Gatlinburg, TE, USA, Sept. 1997

Permalink: https://www.hzdr.de/publications/Publ-2446
Publ.-Id: 2446


Characterization of noncubic boron nitride films grown by a nonnormal angle of ion bombardment

Plass, M. F.; Fukarek, W.; Kolitsch, A.; Mücklich, A.; Möller, W.;
  • Lecture (Conference)
    ICMCTF 97, San Diego, USA

Permalink: https://www.hzdr.de/publications/Publ-2445
Publ.-Id: 2445


Infrared investigation and ion beam analysis of boron nitride coatings

Plass, M. F.; Fukarek, W.; Kolitsch, A.; Möller, W.;
  • Lecture (Conference)
    E-MRS '97 Spring Meeting, Strasbourg, France, June 16-20, 1997

Permalink: https://www.hzdr.de/publications/Publ-2444
Publ.-Id: 2444


Structural studies of buried (SiC)1-x(AlN)x layers fabricated by co-implantation of nitrogen and aluminium ions in 6H-SiC

Pezoldt, J.; Yankov, R. A.; Fukarek, W.; Hatzopoulos, N.; Voelskow, M.; Kreißig, U.; Mücklich, A.; Brauer, G.; Anwand, W.; Heera, V.; Skorupa, W.;
  • Lecture (Conference)
    7th Int. Conf. on Defect Recognition and Image Processing in Semiconductors (DRIP VII), Templin, Germany, Sept. 7 - 10, 1997

Permalink: https://www.hzdr.de/publications/Publ-2443
Publ.-Id: 2443


Ion beam sensitizing of titanium surfaces to hydroxyapatite formation

Pham, M. T.; Matz, W.; Reuther, H.; Richter, E.; Steiner, G.; Oswald, S.;
CaO and P2O5 containing Ti surfaces were prepared and examined for their bioactivity. The preparation involved the incorporation of Ca and P into Ti by ion implantation to a total dose of up to 8 x 1017 ions/cm² with a 1.7 Ca/P ratio and a subsequent oxidation at 500 °C in O2 for 40 min. The model surfaces were examined for their reactivity toward hydroxyapatite formation by microscopically recording the mineralization in a simulated body fluid. The ion implantation modified surfaces were shown to exhibit enhanced mineralization by inducing heterogeneous nucleation, growth, and proliferation of hydroxyapatite, relative to a control sample of pure Ti. The surface induced reactivity was shown to relate to the enhanced provision of the ionic mineral components Ca2+ and HPO42- directly supplied from the surface and the substrate-mediated nucleation by hydroxylated surface TiO2.
Keywords: biomaterials, ion implantation, surface coatings, Ti, hydroxyapatite
  • Contribution to proceedings
    Proceedings of the Eleventh International Conference on Surface Modification of Metals by Ion Beams (SMMIB'99), Sept. 19-14, 1999, Beijing, P.R. China.
  • Surface & Coatings Technology 128-129 (2000) 313-319

Downloads:

  • available with HZDR-Login

Permalink: https://www.hzdr.de/publications/Publ-2442
Publ.-Id: 2442


Ion beam synthesis and characterization of buried (SiC)1-x(AlN)x layers in 6H-SiC

Pezoldt, J.; Yankov, R. A.; Fukarek, W.; Hatzopoulos, N.; Brauer, G.; Anwand, W.; Kreißig, U.; Mücklich, A.; Voelskow, M.; Heera, V.; Skorupa, W.;
  • Lecture (Conference)
    39th Electronic Materials Conf., Fort Collins, Colorado, USA, June 25-27, 1997

Permalink: https://www.hzdr.de/publications/Publ-2441
Publ.-Id: 2441


Roles of implantation parameters on the formation of expanded austenite

Parascandola, S.; Betzl, M.; Richter, E.; Möller, W.;
High-current ion implantation of nitrogen into austenitic stainless steel (AISI 316Ti) at temperatures about 400°C results in the formation of a surface layer, called expanded austenite. A tensor of nitrogen ion energies (1.2, 2.0 and 2.8 keV), ion fluxes (0.2 and 1.0 mA/cm2) and times (2, 10 and 40 min.) has been selected to investigate the roles of the implantation parameters: ion energy, current density and treatment time. In addition, a temperature series has been performed over the range from 280°C to 480°C at fixed processing conditions of 1.2 keV, 0.5 mA/cm2 and 20 min. Nitrogen content and layer thickness have been determined by nuclear reaction analysis. Structural and micromechanical analyses have been performed by X-ray diffraction and microhardness measurements.
  • Poster
    SMMIB 97, Gatlinburg, TE, USA, Sept. 1997

Permalink: https://www.hzdr.de/publications/Publ-2440
Publ.-Id: 2440


Stickstoffdiffusion in austenitischem Edelstahl unter Hochstrom-Ionenimplantation

Parascandola, S.; Günzel, R.; Grötzschel, R.; Richter, E.; Möller, W.;
Die Hochstrom-Ionenimplantation von Stickstoff ermöglicht die Aufstickung von Oberflächen bei niedrigen Temperaturen und in kurzen Zeiten. Die Tribologie von austenitischen Edelstählen kann durch diesen Prozeß extrem verbessert werden. Das Diffusionsverhalten von hochstrom-implantiertem Stickstoff in austenitischem Edelstahl wird untersucht. Dazu werden die Stickstoffprofile von 14N und 15N implantierten Proben mit Kernreaktionsanalyse (NRA) bestimmt und die Oberflächen mit Röntgenbeugungsspektroskopie (XRD) auf strukturelle Veränderungen analysiert. Verschiedene Diffusionsszenarien werden diskutiert und auf Konsistenz mit den experimentellen Ergebnissen getestet.
  • Lecture (Conference)
    DPG Frühjahrstagung Münster, March 18, 1997

Permalink: https://www.hzdr.de/publications/Publ-2439
Publ.-Id: 2439


Surface excitation processes of adsorbed gas molecules on metal surface

Obara, K.; Yiji, P.; Chiba, K.; Fukarek, W.; Möller, W.;
  • Lecture (Conference)
    ICRP-3/SPP-14, Nara, Jan. 1997

Permalink: https://www.hzdr.de/publications/Publ-2437
Publ.-Id: 2437


Positron annihilation spectroscopy, electrical resistivity, and microstructural transmission electron microscopy studies of the CuMn system

Nicht, E.-M.; Brauer, G.; Vostry, P.; Cieslar, M.; Blasek, P.;
  • Lecture (Conference)
    11th Int. Conf. on Positron Annihilation (ICPA-11), Kansas City, USA, May 25-30, 1997

Permalink: https://www.hzdr.de/publications/Publ-2436
Publ.-Id: 2436


Direct measurements of high-energy secondary electrons during plasma immersion ion implantation

Nakamura, K.; Mändl, S.; Brutscher, J.; Günzel, R.; Möller, W.;
  • Lecture (Conference)
    3rd Int. Conf. Reactive Plasmas, Nara, Japan, Jan. 21 - 24, 1997

Permalink: https://www.hzdr.de/publications/Publ-2435
Publ.-Id: 2435


Synchrotron Mössbauer reflectometry: feasibility of depth selective phase analysis of thin films and multilayers

Nagy, D. L.; Bottyan, L.; Deak, L.; Gerdau, E.; Gittsovich, V. N.; Korecki, J.; Leupold, O.; Reuther, H.; Semenov, V. G.; Szilagyi, E.;
  • Lecture (Conference)
    XXXII Zakopane School of Physics, May 10 - 17, 1997

Permalink: https://www.hzdr.de/publications/Publ-2434
Publ.-Id: 2434


Structure and magnetic properties in the low temperature annealing range of FeZrBCu-base alloys

Müller, M.; Grahl, H.; Mattern, N.; Schnell, B.; Reibold, M.; Reuther, H.;
  • Lecture (Conference)
    Soft Magnetic Materials 13, Grenoble, Sept. 24 - 26, 1997

Permalink: https://www.hzdr.de/publications/Publ-2433
Publ.-Id: 2433


In-situ diagnostics using high-energy ion beam analysis

Möller, W.; Fukarek, W.; Grigull, S.; Kruse, O.; Parascandola, S.;
  • Invited lecture (Conferences)
    13th Int. Conf. on Ion Beam Analysis (IBA-13), Lisboa, Portugal, July 1997 (invited lecture)

Permalink: https://www.hzdr.de/publications/Publ-2432
Publ.-Id: 2432


Positronen-Emissions-Tomographie zur Untersuchung von Zweiphasenströmungen

Hensel, F.;
Die Technik der Positronen-Emissions-Tomographie (Positron Emission Tomography, PET) ist ein bildgebendes Verfahren, das für die Nuklearmedizin entwickelt wurde. Im medizinischen Bereich wird diese Technik hauptsächlich als nichtinvasives Untersuchungsverfahren für die quantitative Erfassung von Stoffwechselvorgängen in-vivo genutzt. Hierzu werden die interessierenden Stoffsysteme mit Positronen emittierenden Nukliden wie 11C, 13N, 15O oder 18F markiert. Die Halbwertszeiten dieser Nuklide liegen im Bereich einiger Minuten bis zu einigen Stunden. In einer Vielzahl von organischen Verbindungen können damit die natürlich vorkommenden Nuklide durch ein β+-instabiles Isotop ersetzt werden.

Die Methode Verfahren PET wurde zur Untersuchung von Zweiphasenströmungen gasförmig / flüssig angewendet. Inhalt des Vortrages sind die Darstellung von Ergebnissen der Messung des Dispersionskoeffizienten in einer turbulenten Blasenströmung und die Vorstellung geplanter Anwendungen dieser Tracertechnik in einem derzeit in Aufbau befindlichen PET-Tomographen für Schaumuntersuchungen.

  • Lecture (Conference)
    Workshop "Meßtechnik für stationäre und transiente Mehrphasenströmungen", Rossendorf, 24.-25.September 1998
  • Contribution to HZDR-Annual report
    Prasser, Horst-Michael: (Hrsg.): Workshop "Meßtechnik für stationäre und transiente Mehrphasenströmungen", Forschungszentrum Rossendorf; FZR-241, 1998, 91-96

Permalink: https://www.hzdr.de/publications/Publ-2430
Publ.-Id: 2430


Ionenstrahlen zur Modifizierung und Analyse von Oberflächen

Möller, W.;
  • Invited lecture (Conferences)
    GDCh-Tagung "Oberflächenanalytik", Chemnitz, June 25, 1997 (invited lecture)

Permalink: https://www.hzdr.de/publications/Publ-2429
Publ.-Id: 2429


Basic aspects and applications of plasma immersion ion implantation

Möller, W.;
  • Invited lecture (Conferences)
    German-Japanese Seminar "Physics and Application of Low-Pressure Plasmas", Bad Honnef, June 18, 1997 (invited lecture)

Permalink: https://www.hzdr.de/publications/Publ-2428
Publ.-Id: 2428


Physik und Anwendungen der Plasma-Immersions-Ionenimplantation

Möller, W.;
  • Invited lecture (Conferences)
    VDE/ITG-Seminar "Teilchenstrahl- und Plasmatechnik", Helmsdorf b. Dresden, March 7, 1997 (invited lecture)
  • Lecture (others)
    Elektrotechnisches Kolloquium der Univ. Stuttgart, Jan. 23, 1997

Permalink: https://www.hzdr.de/publications/Publ-2427
Publ.-Id: 2427


X-ray high resolution diffraction and reflectivity studies of the mechanical treatment related defects in opi-ready wafers

Mazur, K.; Sass, J.; Eichhorn, F.;
  • Lecture (Conference)
    3th Autumn School on "X-ray scattering from surfaces and thin layers", Smolenice, Slovakia, Oct. 1 - 4, 1997

Permalink: https://www.hzdr.de/publications/Publ-2426
Publ.-Id: 2426


ROBL - ein Strahlrohr für Radiochemie und Materialforschung an der ESRF

Matz, W.; Schell, N.; Prokert, F.; Schlenk, R.; Claußner, J.; Pröhl, D.; Betzl, M.; Eichhorn, F.; Dienel, S.; Oehme, W.; Bernhard, G.; Funke, H.;
  • Lecture (Conference)
    Gemeinsames Statusseminar im Kloster Seeon, Sept. 14 - 17, 1997

Permalink: https://www.hzdr.de/publications/Publ-2425
Publ.-Id: 2425


Cross-Section TEM analysis of Germanium nanoclusters in thin implanted SiO2 films

Markwitz, A.; Mücklich, A.; von Borany, J.; Matz, W.; Schmidt, B.; Möller, W.;
  • Lecture (Conference)
    Tagung Elektronenmikroskopie, Regensburg , Sept. 7 - 12, 1997

Permalink: https://www.hzdr.de/publications/Publ-2424
Publ.-Id: 2424


Plasma immersion ion implantation of 3D-Objects

Mändl, S.; Günzel, R.; Möller, W.;
  • Lecture (Conference)
    8th German Meeting on Plasma Technology, Dresden, Germany, Sept. 15 – 17, 1997

Permalink: https://www.hzdr.de/publications/Publ-2423
Publ.-Id: 2423


Implantation in 3D-objects using plasma immersion ion implantation

Mändl, S.; Günzel, R.; Möller, W.;
  • Lecture (Conference)
    Spring Meeting, German Physical Society, Münster, Germany, March 17 – 21, 1997

Permalink: https://www.hzdr.de/publications/Publ-2421
Publ.-Id: 2421


Kolorierten Holzschnitten zerstörungsfrei auf der Spur

Mäder, M.; Neelmeijer, C.; Schramm, H.-P.;
  • Lecture (Conference)
    Jahrestagung der GDCh, Archäometrie und Denkmalpflege, Vienna, Austria, March 24 - 26, 1997

Permalink: https://www.hzdr.de/publications/Publ-2420
Publ.-Id: 2420


Hochauflösende Ionenstrahlanalytik (ERDA, RBS) unter Verwendung elektrostatischer und magnetischer Spektrometer

Kruse, O.; Carstanjen, H. D.;
  • Lecture (Conference)
    BMBF-Statusseminar zur Erforschung kondensierter Materie mit Neutronen, nuklearen Sonden, Ionen- und Synchrotronstrahlung, Kloster Seeon, Sept. 14 - 17, 1997

Permalink: https://www.hzdr.de/publications/Publ-2418
Publ.-Id: 2418


Hochauflösende Ionenstrahlanalytik unter Verwendung eines elektrostatischen Spektrometers

Kruse, O.; Carstanjen, H. D.;
  • Lecture (Conference)
    Jahressitzg. d. HS-Arbeitsgruppe "Energiereiche atomare Stöße", Sonthofen, Jan. 27 - 13, 1997

Permalink: https://www.hzdr.de/publications/Publ-2417
Publ.-Id: 2417


Doppler broadening in high resolution ion scattering

Kruse, O.;
  • Lecture (Conference)
    13th Int. Conf. on Ion Beam Analysis (IBA-13), Lisboa, Portugal, July 27 - Aug. 1, 1997

Permalink: https://www.hzdr.de/publications/Publ-2416
Publ.-Id: 2416


High depth resolution ion scattering (ERDA and RBS) by means of an electrostatic spectrometer

Kruse, O.;
  • Lecture (Conference)
    4th Int. Workshop Measurements, Characterization and Modeling of Ultra-Shallow Doping Profiles in Semicond., Res. Triangle Park, USA, April 6 - 9, 1997

Permalink: https://www.hzdr.de/publications/Publ-2415
Publ.-Id: 2415


DCEMS-Tiefenanalyse der Phasenbildung in Al-ionenimplantierten Fe-Oberflächen

Kruijer, S.; Nikolov, O.; Reuther, H.; Weber, S.; Scherrer, S.;
  • Lecture (Conference)
    DPG-Frühjahrstagung, Münster, March 17 - 21, 1997

Permalink: https://www.hzdr.de/publications/Publ-2413
Publ.-Id: 2413


DCEMS-Tiefenanalyse der Phasenbildung in Fe-ionenimplantiertem Si

Kruijer, S.; Dobler, M.; Reuther, H.; Keune, W.;
  • Lecture (Conference)
    DPG-Frühjahrstagung, Münster, March 17 - 21, 1997

Permalink: https://www.hzdr.de/publications/Publ-2412
Publ.-Id: 2412


In situ ERDA studies of ion drift processes during anodic bonding of alkali-borosilicate glasses to metal

Kreißig, U.; Grigull, S.; Lange, K.; Nitzsche, P.; Schmidt, B.;
  • Lecture (Conference)
    13th Int. Conf. on Ion Beam Analysis (IBA-13), Lissabon, Portugal, July 27 - Aug. 1, 1997

Permalink: https://www.hzdr.de/publications/Publ-2411
Publ.-Id: 2411


Development of a user data base system for ion implanter operation

Kolitsch, A.; Schöneich, J.;
  • Lecture (Conference)
    4th DANFYSIK User Meeting, Ispra, Italy, Sept. 1997

Permalink: https://www.hzdr.de/publications/Publ-2410
Publ.-Id: 2410


Deposition by IBAD and characterization of CNx films

Kolitsch, A.; Möller, W.; Magula, V.;
  • Lecture (Conference)
    COST PISE, Final Meeting, Nancy, France, Sept. 1997

Permalink: https://www.hzdr.de/publications/Publ-2409
Publ.-Id: 2409


Growth and characterization of boron nitride thin films

Kolitsch, A.; Möller, W.;
  • Lecture (Conference)
    COST PISE, Final Meeting, Nancy, France, Sept. 1997

Permalink: https://www.hzdr.de/publications/Publ-2408
Publ.-Id: 2408


Metal gettering by defective regions in carbon-implanted silicon

Kögler, R.; Kaschny, J. R.; Yankov, R. A.; Skorupa, W.; Werner, P.; Danilin, A. B.;
  • Lecture (Conference)
    7th Int. Conf. on Gettering and Defect Engineering in Semiconductor Technology, GADEST'97, Spa, Belgium, Oct. 5 - 10, 1997

Permalink: https://www.hzdr.de/publications/Publ-2407
Publ.-Id: 2407


Implantationsdefekte in Silizium: Der Rp/2-Effekt

Kögler, R.;
  • Lecture (Conference)
    34. Treffen des Dt. Arbeitskreises"Punktdefekte", MPI-FKF, Stuttgart, Nov. 26 - 27, 1997

Permalink: https://www.hzdr.de/publications/Publ-2406
Publ.-Id: 2406


Computer-simulation and RBS/C studies of high-dose N+ and Al+ co-implantation in 6H-SiC

Kharlamov, V. S.; Kulikov, A. V.; Trushin, Y. V.; Tsigankov, D. N.; Yankov, R. A.; Voelskow, M.; Skorupa, W.; Pezoldt, J.;
  • Lecture (Conference)
    Int. Workshop on New Approaches to Hi-Tech Materials'97 - Nondestructive Testing and Comp. Simulat. in Mat. Sc. and Eng., St. Petersburg, Russia, June 9 - 12, 1997

Permalink: https://www.hzdr.de/publications/Publ-2405
Publ.-Id: 2405


Helium induced cavities in silicon: their formation, microstructure and gettering ability

Kaschny, J. R.; Mücklich, A.; Kreißig, U.; Yankov, R. A.; Kögler, R.; Skorupa, W.; Fichtner, P. F. P.; Danilin, A. B.;
  • Lecture (Conference)
    MRS Spring Meeting, San Francisco, CA, USA, March 31 - April 4, 1997
  • Contribution to external collection
    MRS Conf. Proc. 469 (1997) 321

Permalink: https://www.hzdr.de/publications/Publ-2404
Publ.-Id: 2404


Ion microprobe analyses of ancient human bone

Jankuhn, S.; Butz, T.; Flagmeyer, R.-H.; Reinert, T.; Vogt, J.; Barckhausen, B.; Hammerl, J.; Protsch Von Zieten, R.; Grambole, D.; Herrmann, F.; Bethge, K.;
At the Rossendorf nuclear microprobe facility, a beam of protons with MeV energy was used to analyse ancient human bones of the Merowingian period (6-8th
century AD), Emitted X-rays were detected to determine the elemental composition of the bones and to estimate the influence of the burial environment on the
elemental content of the skeletons, In cross sections of human femora, a different behaviour of the radial distributions of the main and trace elements like P, Ca, Mn,
Fe, Zn, Br, and Sr was observed using lateral-resolved mu PIXE. This result indicates post mortem mineral exchange processes and diagenetic alteration during
burial of bone tissue in soil.
Keywords: microprobe, PIXE, ancient human bone, elemental profiles
  • Lecture (Conference)
    13th Int. Conf. on Ion Beam Analysis (IBA-13), Lissabon, Portugal, July 27 - Aug. 1, 1997
  • Nucl. Instr. Meth. B 136 - 138 (1998) 329

Downloads:

  • available with HZDR-Login

Permalink: https://www.hzdr.de/publications/Publ-2403
Publ.-Id: 2403


Increased tool cutting life of drills by ion implantation

Hilke, R.; Mändl, S.;
  • Lecture (Conference)
    8th Int. Symp. Danube Adria Assoc. for Automation & Manufacturing, Dubrovnik, Croatia, Oct. 23 - 25, 1997

Permalink: https://www.hzdr.de/publications/Publ-2402
Publ.-Id: 2402


Pd defect complexes in ZnTe and CdTe and their interaction with group-V elements

Hermann, S.; Mahnke, H.-E.; Spellmeyer, B.; Wienecke, M.; Reinhold, B.; Yankov, R. A.; Gumlich, H.-E.;
  • Lecture (Conference)
    Int. Conf. on II-VI Compound Semiconductors, Grenoble, France, August 1997

Permalink: https://www.hzdr.de/publications/Publ-2401
Publ.-Id: 2401


Phase transformations during ion beam synthesis: computational approaches to the kinetics of nucleation, growth, Ostwald ripening and coalescence

Heinig, K.-H.; Strobel, M.; Schmidt, B.;
  • Lecture (Conference)
    MRS Fall Meeting, Boston, USA, Dec. 1-5, 1997

Permalink: https://www.hzdr.de/publications/Publ-2400
Publ.-Id: 2400


Predictive simulations of high-dose ion implantation

Heinig, K.-H.; Strobel, M.; Palard, M.; Schmidt, B.; Grötzschel, R.; Markwitz, A.;
  • Lecture (Conference)
    Int. Workshop on Challenges in Predictive Process Simulation (ChiPPS '97), Wandlitz, Germany, Aug. 17 - 20, 1997

Permalink: https://www.hzdr.de/publications/Publ-2399
Publ.-Id: 2399


Self-organized Ge nanocrystals produced in SiO2 layers by ion beam synthesis

Heinig, K.-H.; Schmidt, B.; Grötzschel, R.; Markwitz, A.; von Borany, J.; Strobel, M.;
  • Lecture (Conference)
    MRS Fall Meeting, Boston, USA, Dec. 1-5, 1997

Permalink: https://www.hzdr.de/publications/Publ-2398
Publ.-Id: 2398


Ionenstrahlsynthese von Nanoclustern und Schichten: Kinetik von Keimbildung, Wachstum und Ostwald-Reifen

Heinig, K.-H.; Reiss, S.; Strobel, M.; Möller, W.;
  • Invited lecture (Conferences)
    Frühjahrstagung der DPG, Münster, Germany, March 17-21, 1997 (invited lecture)

Permalink: https://www.hzdr.de/publications/Publ-2397
Publ.-Id: 2397


Kinetic 3D lattice Monte-Carlo simulation of phase transformations at ion beam synthesis of nanoclusters

Heinig, K.-H.; Strobel, M.;
  • Lecture (Conference)
    E-MRS Spring Meeting, Strasbourg, France, June 16 - 20, 1997

Permalink: https://www.hzdr.de/publications/Publ-2396
Publ.-Id: 2396


Fundamentals of ion beam synthesis of nanoclusters and buried layers

Heinig, K.-H.;
  • Invited lecture (Conferences)
    European Conference on Accelerators in Applied Research and Technology (ECAART5), Eindhoven, The Netherlands, Aug. 26 - 30, 1997 (invited lecture)

Permalink: https://www.hzdr.de/publications/Publ-2395
Publ.-Id: 2395


Precipitation of nanoclusters with ion beam synthesis

Heinig, K.-H.;
  • Invited lecture (Conferences)
    Gordon Research Conference "Materials Processing far from Equilibrium", Meriden , USA, Aug. 17 - 22, 1997 (invited lecture)

Permalink: https://www.hzdr.de/publications/Publ-2394
Publ.-Id: 2394


Co-Implantation in Si(111) bei Stromdichten größer 1 A/cm2

Hausmann, S.; Bischoff, L.; Teichert, J.; Herrmann, F.; Grambole, D.;
  • Lecture (Conference)
    DPG-Frühjahrstagung, Münster, March 17 - 21, 1997

Permalink: https://www.hzdr.de/publications/Publ-2393
Publ.-Id: 2393


Plasma-source ion implantation compared with glow-discharge plasma nitriding of stainless steel

Günzel, R.; Betzl, M.; Alphonsa, I.; Ganguly, B.; John, P. I.; Mukherjee, S.;
  • Lecture (Conference)
    AEPSE `97, Seoul, Korea, Oct. 5-9, 1997
  • Surface & Coatings Technology 112 (1999) 307-309

Downloads:

  • available with HZDR-Login

Permalink: https://www.hzdr.de/publications/Publ-2392
Publ.-Id: 2392


Diffusion behaviour, outgasing and absorption of nitrogen during plasma immersion ion implantation of stainless steel

Günzel, R.; Möller, W.; Parascandola, S.; Richter, E.;
  • Lecture (Conference)
    AEPSE `97, Seoul, Korea, Oct. 5-9, 1997

Permalink: https://www.hzdr.de/publications/Publ-2391
Publ.-Id: 2391


Ion implantation of Ge in Si, characterization in Si1-xGex structures

Ganetsos, T.; Mair, G. L. R.; Teichert, J.; Bischoff, L.; Aidinis, C.;
  • Lecture (Conference)
    XIIIrd Greek Conf. in Solid State Physics, Thessaloninki, Greece, Sept. 1997

Permalink: https://www.hzdr.de/publications/Publ-2390
Publ.-Id: 2390


Investigations on the structure of boron nitride films

Fukarek, W.; Kruse, O.; Kolitsch, A.; Möller, W.;
  • Lecture (Conference)
    ICMCTF 97, San Diego, USA
  • Thin Solid Films 308-309 (1997) 38

Downloads:

  • available with HZDR-Login

Permalink: https://www.hzdr.de/publications/Publ-2389
Publ.-Id: 2389


Untersuchungen zur Struktur von Bornitridschichten

Fukarek, W.; Kruse, O.; Kolitsch, A.;
  • Lecture (Conference)
    4. c-BN-Expertentreffen, Reichenau, June 23 - 24, 1997

Permalink: https://www.hzdr.de/publications/Publ-2388
Publ.-Id: 2388


Simultaneous in situ ellipsometry and elastic recoil detection analysis during plasma processing

Fukarek, W.;
  • Lecture (Conference)
    ICSE-2, Charleston 1997

Permalink: https://www.hzdr.de/publications/Publ-2387
Publ.-Id: 2387


Operation and developments at the Rossendorf electrostatic accelerators

Friedrich, M.; Bürger, W.; Turuc, S.;
  • Lecture (Conference)
    12th Int. Conf. on Electrostatic Accelerators, Obninsk, Russia, Nov. 25 - 28, 1997

Permalink: https://www.hzdr.de/publications/Publ-2386
Publ.-Id: 2386


Nucleation and growth of platelet bubble structures in helium implanted silicon

Fichtner, P. F. P.; Kaschny, J. R.; Kling, A.; Trinkaus, H.; Yankov, R. A.; Mücklich, A.; Skorupa, W.; Zawislak, F. C.; Amaral, L.; Da Silva, M. F.; Soares, J. C.;
  • Lecture (Conference)
    13th Int. Conf. on Ion Beam Analysis (IBA-13), Lisboa, Portugal, July 27 - Aug 1, 1997

Permalink: https://www.hzdr.de/publications/Publ-2385
Publ.-Id: 2385


X-ray scattering characterization of Si implanted with MeV Ge ions

Eichhorn, F.; Mazur, K.; Sass, J.;
  • Lecture (Conference)
    3th Autumn School on "X-ray scattering from surfaces and thin layers", Smolenice, Slovakia, Oct. 1 - 4, 1997

Permalink: https://www.hzdr.de/publications/Publ-2384
Publ.-Id: 2384


CEMS- und AES-Untersuchungen an Eisensiliziden

Dobler, M.; Reuther, H.; Möller, W.;
  • Lecture (Conference)
    DPG-Frühjahrstagung, Münster, March 17 - 21, 1997

Permalink: https://www.hzdr.de/publications/Publ-2383
Publ.-Id: 2383


Swelling and surface profil of glass surfaces after ion bombardment

Deshkovskaya, A. A.; Richter, E.;
  • Lecture (Conference)
    VITT Minsk, Belarus, Sept. 1997

Permalink: https://www.hzdr.de/publications/Publ-2382
Publ.-Id: 2382


Investigation of phase formation and liquidation in glass layers produced by ion beam synthesis

Deshkovskaya, A. A.; Richter, E.; Komar, V.; Skornyakov, I.;
  • Lecture (Conference)
    VITT Minsk, Belarus, Sept. 1997

Permalink: https://www.hzdr.de/publications/Publ-2381
Publ.-Id: 2381


Developments at the Rossendorf electrostatic accelerators

Bürger, W.; Friedrich, M.; Turuc, S.;
  • Lecture (Conference)
    31st SNEAP Symposium, Jülich, Oct. 13 . 15, 1997

Permalink: https://www.hzdr.de/publications/Publ-2380
Publ.-Id: 2380


Metall-Plasmaimmersions-Ionenimplantation und –abscheidung (MPIIID)

Brückner, J.; Günzel, R.;
  • Lecture (Conference)
    8. Bundesdeutsche Fachtagung Plasmatechnologie, Dresden, Sept. 14 - 17, 1997

Permalink: https://www.hzdr.de/publications/Publ-2379
Publ.-Id: 2379


The ELBE radiation source project at the Research Center Rossendorf

Brauer, G.; Wendler, W.; Büttig, H.; Gabriel, F.; Gippner, P.; Gläser, W.; Grosse, E.; Guratzsch, H.; Dönau, F.; Höhnel, G.; Janssen, D.; Nething, U.; Pobell, F.; Prade, H.; Pröhl, D.; Schilling, K.-D.; Schlenk, R.; Seidel, W.; Stephan, J.; vom Stein, P.; Wenzel, M.; Wustmann, B.; Zahn, R.;
  • Lecture (Conference)
    11th Int. Conf. on Positron Annihilation (ICPA-11), Kansas City, USA, May 25-30, 1997
  • Mat. Sci. Forum 255-257 (1997) 732

Downloads:

  • available with HZDR-Login

Permalink: https://www.hzdr.de/publications/Publ-2378
Publ.-Id: 2378


Strong Blue Photo- and Electroluminescence from Ge implanted SiO2 films

von Borany, J.; Grötzschel, R.; Heinig, K.-H.; Markwitz, A.; Matz, W.; Möller, W.; Rebohle, L.; Schmidt, B.; Skorupa, W.;
  • Lecture (Conference)
    Herbstschule Elektronenmikroskopie, Halle, Sept. 20 - 25, 1997

Permalink: https://www.hzdr.de/publications/Publ-2377
Publ.-Id: 2377


Schwingungsmodellierung zur Unterstützung der Diagnostik an Druckwasserreaktoren

Altstadt, E.;
Überblicksvortrag zu den Arbeiten zur Schwingungsmodellierung und Diagnostik an Reaktoren des Typs WWER-440
Keywords: Finite-Elemente-Analyse, Schwingungsüberwachung
  • Lecture (others)
    Sächsisches Kolloquium Technische Diagnostik, TU Dresden, 29.01.1999

Permalink: https://www.hzdr.de/publications/Publ-2376
Publ.-Id: 2376


Finite element-based vibration analyses of WWER-440 type reactors

Altstadt, E.; Weiss, F.-P.;
To support the early detection of mechanical component faults at WWER-440 reactors a finite-element-model describing the mechanical vibrations of the whole primary circuit was established. A special element was developed to describe the fluid-structure interaction in the downcomer. It is based on an approximated analytical 2D-solution of the coupled system of 3D fluid equations and the structural equations of motions.
The vibration modes up to 30 Hz were calculated. It is shown that the fluid-structure interaction strongly influences those modes with a relative displacement between reactor pressure vessel and core barrel.
Moreover, by means of the model the shift of eigenfrequencies due to the degradation or to the failure of internal clamping and spring elements was investigated. Comparing the frequency spectra of the normal and the faulty structure, one could prove that a recognition of such degradations and failures even inside the reactor pressure vessel is possible by pure excore vibration measurements. The results hint at the
opportunity to establish a monitoring procedure that is capable of distinguishing between guide lug and spring pipe failures, because these two types of failures are mapped in different and well separated frequency regions. Moreover, it seems that it is possible to detect these failures by pure excore vibration measurements, what is important since incore vibration measurements are difficultly to be implemented over longer time periods. When measuring the displacements for x and y-direction even the localization of the failed guide lug might become achievable.
Keywords: finite-element analysis, FSI, vibration monitoring
  • Nuclear Technology, Vol. 128 (1999) p. 46-57

Downloads:

  • available with HZDR-Login

Permalink: https://www.hzdr.de/publications/Publ-2375
Publ.-Id: 2375


Finite-element based vibration analyses of WWER-440 type reactors

Altstadt, E.; Weiss, F.-P.;
A finite-element-model describing the mechanical vibrations of the whole WWER-440 primary circuit was established to support the early detection of mechanical component faults. A special fluid-structure module was developed to consider the reaction forces of the fluid in the downcomer upon the moving core barrel and the rector pressure vessel. This fluid-structure interaction module is based on an approximated analytical 2D-solution of the coupled system of 3D fluid equations and the structural equations of motions. By means of the vibration model all igenfrequencies up to 30 Hz and the corresponding mode shapes were calculated. It is shown that the fluid-structure interaction strongly influences those modes that lead to a relative displacement between reactor pressure vessel and core barrel. Moreover, by means of the model the shift of eigenfrequencies due to the degradation or to the failure of internal clamping and spring elements was investigated. Comparing the frequency spectra of the normal and the faulty structure, it could be proved that a recognition of such degradations and failures even inside the reactor pressure vessel is possible by pure excore vibration measurements.
Keywords: finite-element-modelling, fluid-structure interactions, vibration monitoring
  • Annals of Nuclear Energy, Vol 26 (12), 1999, pp. 1037-1052

Downloads:

  • available with HZDR-Login

Permalink: https://www.hzdr.de/publications/Publ-2374
Publ.-Id: 2374


Finite element analysis of a BWR feed water distributor under extreme transient pressure load

Altstadt, E.; Ohlmeyer, H.; Otremba, F.; Weiss, F.-P.;
During a hypothetical break of a BWR feed water line, the feed water distributor (FWD) inside the RPV is subjected to a high pressure load for a short time (10 ms). Because of the sudden coolant release from the inner volume of the FWD there is a pressure difference between the inner and outer surface. It is conservatively assumed that the pressure difference nearly can reach the operating pressure for a few milliseconds. The ring line of the feed water distributor is modelled with shell and volume elements capable of being used for large strain analyses with elastic-plastic material behaviour. It is demonstrated by non-linear static calculations (without consideration of the inertia of the material) that a buckling instability occurs at about 60% of the maximum pressure load. The arc-length method is used for the numerical solution to overcome this point of instability. To evaluate the influence of the dynamics of the process a non-linear transient analysis is done showing that the maximum strain occurs with a time delay to the pressure peak. The maximum plastic strain differs only nsignificantly between static and transient solution. Inspite of the large strains the mechanical integrity is maintained during the hypothetical event.
Keywords: BWR, Finite element analysis, Large strain, Plasticity, Transient analysis
  • Lecture (Conference)
    7th International Conference on Nuclear Engineering (ICONE-7), April 19-23, 1999, Tokyo, ICONE-7073
  • Contribution to proceedings
    7th International Conference on Nuclear Engineering (ICONE-7), April 19-23, 1999, Tokyo, ICONE-7073

Permalink: https://www.hzdr.de/publications/Publ-2373
Publ.-Id: 2373


Tritium depth profiling in carbon samples from fusion experiments

Friedrich, M.; Pilz, W.; Sun, G.; Behrisch, R.; Garcia-Rosales, C.; Bekris, N.; Penzhorn, R.-D.;
Tritium depth profiling measurements by accelerator mass spectrometry have been performed at the facility installed at the Rossendorf 3 MV Tandetron. Hydrogen and deuterium profiles are measured with the Faraday cup between the injection magnet and the accelerator, while the tritium is counted after the accelerator with semiconductor detectors. Depth profiles have been measured for carbon samples which had been exposed to the D,D plasma at the first wall of the Garching fusion experiment ASDEX-Upgrade and from the European fusion experiment JET, Culham/UK, which had been operated part time with a D,T plasma. The tritium contents of the samples from JET were up to six orders higher compared to the samples from ASDEX-Upgrade. The problem of the detector overloading during measurements of samples with a medium tritium content has been solved by installation of a scanning system in the AMS beamline, which enables defined scanning of the tritium beam over an aperture in front of the detector. The tritium beam current from samples with high tritium content has been measured directly in the Faraday cup before the accelerator. A dedicated AMS facility with an air-insulated 100 kV tandem accelerator is under construction.


Keywords: Electrostatic Accelerators, Mass Spectrometry, Tritium, Fusion
  • Nuclear Instruments and Methods B 172 (2000) 655-658

Downloads:

  • available with HZDR-Login

Permalink: https://www.hzdr.de/publications/Publ-2372
Publ.-Id: 2372


Photo-and electroluminescence from Ge implanted SiO2 films

von Borany, J.; Grötzschel, R.; Heinig, K.-H.; Markwitz, A.; Möller, W.; Rebohle, L.; Schmidt, B.; Skorupa, W.;
  • Lecture (Conference)
    Gordon Conference, New Hampshire, USA, August 1997

Permalink: https://www.hzdr.de/publications/Publ-2371
Publ.-Id: 2371


Mikro- und Nanostrukturierung mit Ionenfeinstrahlen

Bischoff, L.; Hausmann, S.; Teichert, J.; von Borany, J.;
  • Lecture (Conference)
    Messe Technologie-Dialog Mikrosystemtechnik/Neue Materialien, Gera, April 9, 1997
  • Lecture (Conference)
    Hannover Messe, April 1997 & Forschungsforum '97, Leipzig, Sept. 20, 1997

Permalink: https://www.hzdr.de/publications/Publ-2370
Publ.-Id: 2370


Maskenlose schreibende Ionenimplantation mit massensepatiertem FIB

Bischoff, L.;
  • Lecture (Conference)
    19. Deutsches Nutzertreffen Ionenimplanation, Robert-Bosch GmbH, Reutlingen, April 24 - 25, 1997

Permalink: https://www.hzdr.de/publications/Publ-2369
Publ.-Id: 2369


Positron mobility in semi-insulating 4H-SiC

Beling, C. D.; Fung, S.; Cheung, S. H.; Ling, C. C.; Brauer, G.;
  • Lecture (Conference)
    11th Int. Conf. on Positron Annihilation (ICPA-11), Kansas City, USA, May 25-30, 1997

Permalink: https://www.hzdr.de/publications/Publ-2368
Publ.-Id: 2368


Pages: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] [56] [57] [58] [59] [60] [61] [62] [63] [64] [65] [66] [67] [68] [69] [70] [71] [72] [73] [74] [75] [76] [77] [78] [79] [80] [81] [82] [83] [84] [85] [86] [87] [88] [89] [90] [91] [92] [93] [94] [95] [96] [97] [98] [99] [100] [101] [102] [103] [104] [105] [106] [107] [108] [109] [110] [111] [112] [113] [114] [115] [116] [117] [118] [119] [120] [121] [122] [123] [124] [125] [126] [127] [128] [129] [130] [131] [132] [133] [134] [135] [136] [137] [138] [139] [140] [141] [142] [143] [144] [145] [146] [147] [148] [149] [150] [151] [152] [153] [154] [155] [156] [157] [158] [159] [160] [161] [162] [163] [164] [165] [166] [167] [168] [169] [170] [171] [172] [173] [174] [175] [176] [177] [178] [179] [180] [181] [182] [183] [184] [185] [186] [187] [188] [189] [190] [191] [192] [193] [194] [195] [196] [197] [198] [199] [200] [201] [202] [203] [204] [205] [206] [207] [208] [209] [210] [211] [212] [213] [214] [215] [216] [217] [218] [219] [220] [221] [222] [223] [224] [225] [226] [227] [228] [229] [230] [231] [232] [233] [234] [235] [236] [237] [238] [239] [240] [241] [242] [243] [244] [245] [246] [247] [248] [249] [250] [251] [252] [253] [254] [255] [256] [257] [258] [259] [260] [261] [262] [263] [264] [265] [266] [267] [268] [269] [270] [271] [272] [273] [274]