Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

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Only approved publications

32228 Publications
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

Publ.-Id: 2466 - Permalink


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.

Publ.-Id: 2465 - Permalink


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

Publ.-Id: 2460 - Permalink


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

Publ.-Id: 2459 - Permalink


Nitrierung austenitischer Edelstähle mittels Plasma-Immersions-Ionenimplantation
Richter, E.;
  • Lecture (Conference)
    OWT-97, Chemnitz, June 16-18, 1997

Publ.-Id: 2458 - Permalink


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

Publ.-Id: 2457 - Permalink


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

Publ.-Id: 2456 - Permalink


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

Publ.-Id: 2455 - Permalink


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)

Publ.-Id: 2454 - Permalink


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

Publ.-Id: 2452 - Permalink


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

Publ.-Id: 2451 - Permalink


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

Publ.-Id: 2450 - Permalink


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

Publ.-Id: 2449 - Permalink


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)

Publ.-Id: 2448 - Permalink


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)

Publ.-Id: 2447 - Permalink


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

Publ.-Id: 2446 - Permalink


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

Publ.-Id: 2445 - Permalink


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

Publ.-Id: 2444 - Permalink


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

Publ.-Id: 2443 - Permalink


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

Publ.-Id: 2442 - Permalink


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

Publ.-Id: 2441 - Permalink


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

Publ.-Id: 2440 - Permalink


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

Publ.-Id: 2439 - Permalink


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

Publ.-Id: 2437 - Permalink


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

Publ.-Id: 2436 - Permalink


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

Publ.-Id: 2435 - Permalink


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

Publ.-Id: 2434 - Permalink


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

Publ.-Id: 2433 - Permalink


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)

Publ.-Id: 2432 - Permalink


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

Publ.-Id: 2430 - Permalink


Ionenstrahlen zur Modifizierung und Analyse von Oberflächen
Möller, W.;
  • Invited lecture (Conferences)
    GDCh-Tagung "Oberflächenanalytik", Chemnitz, June 25, 1997 (invited lecture)

Publ.-Id: 2429 - Permalink


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)

Publ.-Id: 2428 - Permalink


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

Publ.-Id: 2427 - Permalink


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

Publ.-Id: 2426 - Permalink


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

Publ.-Id: 2425 - Permalink


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

Publ.-Id: 2424 - Permalink


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

Publ.-Id: 2423 - Permalink


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

Publ.-Id: 2421 - Permalink


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

Publ.-Id: 2420 - Permalink


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

Publ.-Id: 2418 - Permalink


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

Publ.-Id: 2417 - Permalink


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

Publ.-Id: 2416 - Permalink


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

Publ.-Id: 2415 - Permalink


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

Publ.-Id: 2413 - Permalink


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

Publ.-Id: 2412 - Permalink


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

Publ.-Id: 2411 - Permalink


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

Publ.-Id: 2410 - Permalink


Deposition by IBAD and characterization of CNx films
Kolitsch, A.; Möller, W.; Magula, V.;
  • Lecture (Conference)
    COST PISE, Final Meeting, Nancy, France, Sept. 1997

Publ.-Id: 2409 - Permalink


Growth and characterization of boron nitride thin films
Kolitsch, A.; Möller, W.;
  • Lecture (Conference)
    COST PISE, Final Meeting, Nancy, France, Sept. 1997

Publ.-Id: 2408 - Permalink


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

Publ.-Id: 2407 - Permalink


Implantationsdefekte in Silizium: Der Rp/2-Effekt
Kögler, R.;
  • Lecture (Conference)
    34. Treffen des Dt. Arbeitskreises"Punktdefekte", MPI-FKF, Stuttgart, Nov. 26 - 27, 1997

Publ.-Id: 2406 - Permalink


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

Publ.-Id: 2405 - Permalink


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

Publ.-Id: 2404 - Permalink


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

Publ.-Id: 2403 - Permalink


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

Publ.-Id: 2402 - Permalink


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

Publ.-Id: 2401 - Permalink


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

Publ.-Id: 2400 - Permalink


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

Publ.-Id: 2399 - Permalink


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

Publ.-Id: 2398 - Permalink


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)

Publ.-Id: 2397 - Permalink


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

Publ.-Id: 2396 - Permalink


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)

Publ.-Id: 2395 - Permalink


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)

Publ.-Id: 2394 - Permalink


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

Publ.-Id: 2393 - Permalink


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

Publ.-Id: 2392 - Permalink


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

Publ.-Id: 2391 - Permalink


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

Publ.-Id: 2390 - Permalink


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

Publ.-Id: 2389 - Permalink


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

Publ.-Id: 2388 - Permalink


Simultaneous in situ ellipsometry and elastic recoil detection analysis during plasma processing
Fukarek, W.;
  • Lecture (Conference)
    ICSE-2, Charleston 1997

Publ.-Id: 2387 - Permalink


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

Publ.-Id: 2386 - Permalink


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

Publ.-Id: 2385 - Permalink


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

Publ.-Id: 2384 - Permalink


CEMS- und AES-Untersuchungen an Eisensiliziden
Dobler, M.; Reuther, H.; Möller, W.;
  • Lecture (Conference)
    DPG-Frühjahrstagung, Münster, March 17 - 21, 1997

Publ.-Id: 2383 - Permalink


Swelling and surface profil of glass surfaces after ion bombardment
Deshkovskaya, A. A.; Richter, E.;
  • Lecture (Conference)
    VITT Minsk, Belarus, Sept. 1997

Publ.-Id: 2382 - Permalink


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

Publ.-Id: 2381 - Permalink


Developments at the Rossendorf electrostatic accelerators
Bürger, W.; Friedrich, M.; Turuc, S.;
  • Lecture (Conference)
    31st SNEAP Symposium, Jülich, Oct. 13 . 15, 1997

Publ.-Id: 2380 - Permalink


Metall-Plasmaimmersions-Ionenimplantation und –abscheidung (MPIIID)
Brückner, J.; Günzel, R.;
  • Lecture (Conference)
    8. Bundesdeutsche Fachtagung Plasmatechnologie, Dresden, Sept. 14 - 17, 1997

Publ.-Id: 2379 - Permalink


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

Publ.-Id: 2378 - Permalink


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

Publ.-Id: 2377 - Permalink


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

Publ.-Id: 2376 - Permalink


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

Publ.-Id: 2375 - Permalink


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

Publ.-Id: 2374 - Permalink


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

Publ.-Id: 2373 - Permalink


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

Publ.-Id: 2372 - Permalink


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

Publ.-Id: 2371 - Permalink


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

Publ.-Id: 2370 - Permalink


Maskenlose schreibende Ionenimplantation mit massensepatiertem FIB
Bischoff, L.;
  • Lecture (Conference)
    19. Deutsches Nutzertreffen Ionenimplanation, Robert-Bosch GmbH, Reutlingen, April 24 - 25, 1997

Publ.-Id: 2369 - Permalink


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

Publ.-Id: 2368 - Permalink


Influence of surface roughness on measuring depth profiles and the total amount of implanted ions by RBS and ERDA
Behrisch, R.; Grigull, S.; Kreißig, U.; Grötzschel, R.;
  • Lecture (Conference)
    13th Int. Conf. on Ion Beam Analysis (IBA-13), Lisboa, Portugal, Aug. 1997

Publ.-Id: 2367 - Permalink


Process simulation of sub-µm pattern formation by local oxidation of CoSi2/Si heterostructures
Antons, A.; Heinig, K.-H.; Mantl, S.;
  • Lecture (Conference)
    Int. Workshop on Challenges in Predictive Process Simulation (ChiPPS '97), Wandlitz, Germany, Aug. 17 - 20, 1997

Publ.-Id: 2364 - Permalink


Atomic scale simulations based on classical molecular-dynamics and ab initio-methods: advantageous tools for understanding growth and properties of boron nitride
Albe, K.; Posselt, M.; Möller, W.;
  • Lecture (Conference)
    Int. Workshop on Challenges in Predictive Process Simulation (ChiPPS '97), Wandlitz, Germany, Aug. 17 - 20, 1997

Publ.-Id: 2363 - Permalink


Molecular-dynamics simulations on boron nitride thin film deposition
Albe, K.; Möller, W.;
  • Invited lecture (Conferences)
    10th Int. Conference on Surface Modification of Metals by Ion Beams, Gatlinburg, USA, September 22-26, 1997 (invited lecture)

Publ.-Id: 2362 - Permalink


Computersimulationen zur Schichtabscheidung von Bornitrid
Albe, K.; Möller, W.;
  • Lecture (Conference)
    Frühjahrstagung der DPG, AK: Festkörperphysik, FB: Dünne Schichten, Münster, Germany, March 17-21, 1997

Publ.-Id: 2361 - Permalink


High-spin states in 205Rn: A new shears band structure?
Novak, J. R.; Beausang, C. W.; Amzal, N.; Casten, R. F.; Cata Danil, G.; Cocks, J. F. C.; Cooper, J. R.; Greenlees, P. T.; Hannachi, F.; Helariutta, K.; Jones, P.; Julin, R.; Juutinen, S.; Kankaanpaä, H.; Kettunen, H.; Krücken, R.; Kuusiniemi, P.; Leino, M.; Benyuan, L.; Muikku, M.; Savelius, A.; Socci, T.; Thomas, J. T.; Zamfir, N. V.; Zhang, J.-Y.; Frauendorf, S.;
  • Physical Review C, Volume 59, Number 6, June 1999, R2989-R2992

Publ.-Id: 2360 - Permalink


Magnetic rotational bands in 108Sb
Jenkins, D. G.; Wadsworth, R.; Cameron, J.; Clark, R. M.; Fossan, D. B.; Hibbert, I. M.; Janzen, V. P.; Krücken, R.; Lane, G. J.; Lee, I. Y.; Macchiavelli, A. O.; Parry, C. M.; Sears, J. M.; Smith, J. F.; Frauendorf, S.;
  • Physical Review C, Volume 58, Number 5, November 1998, 2703-2709

Publ.-Id: 2359 - Permalink


In-situ TEM study of the evolution of CoSi2 precipitates during annealing and ion irradiation
Palard, M.; Ruault, M. O.; Bernas, H.; Strobel, M.; Heinig, K.-H.;
  • Contribution to external collection
    Proc. of the Royal Microscopical Society Conf. "Microscopy of Semiconducting Materials 1997"; Inst. Phys. Conf. Ser. 157 (1997) 501
  • Lecture (Conference)
    10th International Conference on Microscopy of Semiconducting Materials, Oxford, UK, April 7 - 10, 1997

Publ.-Id: 2358 - Permalink


TEM investigation of CxSi defects in C implanted silicon
Werner, P.; Eichler, S.; Mariani, G.; Kögler, R.; Skorupa, W.;
  • Appl. Phys. Lett. 70 (1997) 252

Publ.-Id: 2357 - Permalink


Preparation, structure and properties of MoSx films
Weise, G.; Mattern, N.; Hermann, H.; Teresiak, A.; Bächer, I.; Brückner, W.; Bauer, H.-D.; Vinzelberg, H.; Reiss, G.; Kreißig, U.; Mäder, M.; Markschläger, P.;
  • Thin Solid Films 298 (1997) 98

Publ.-Id: 2356 - Permalink


Generation of radiation defects in high resistivity silicon at cyclic irradiation and annealing
Verbitskaya, E. M.; Eremin, V. K.; Ivanov, A. M.; Li, Z.; Schmidt, B.;
  • Fisika i Tekhnika Poluprovodnikov 31 (1997) 235

Publ.-Id: 2355 - Permalink


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