Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

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42154 Publications

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

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

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

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

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.

Abstract

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

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

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

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

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

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

Abstract

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

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.

Abstract

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Das Rossendorfer Strahlrohr ROBL an der ESRF

Matz, W.

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

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

Synchrotronstrahlung: Eigenschaften, Quellen, Anwendungen

Matz, W.

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

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

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

ROBL: Strahlrohr und Experimentierausrüstung

Matz, W.

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

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

Plasma immersion ion implantation

Mändl, S.

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

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

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

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

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

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

Implantations- und Ausheileffekte in SiC

Heera, V.

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

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

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

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

Grundlagen der Ionenstrahlanalytik

Grötzschel, R.

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

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

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

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

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

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

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

Ionenstrahlphysik und Technik im Forschungszentrum Rossendorf

von Borany, J.

  • Lecture (others)
    FernUniversität Hagen, FB Elektrotechnik, Jan. 31, 1997

Permalink: https://www.hzdr.de/publications/Publ-2483

Zusammenarbeit mit industriellen Einrichtungen (Industriekooperation)

von Borany, J.

  • Lecture (others)
    Vortrag zur Evaluierung durch den Wissenschaftlichen Beirat des FZR, Rossendorf, Apr. 29, 1997

Permalink: https://www.hzdr.de/publications/Publ-2482

Neutronenstreuung am RFR

Betzl, M.

  • Lecture (others)
    Vortrag auf Kolloquium des VKTA - 40 Jahre Rossendorfer Forschungsreaktor RFR, Rossendorf, Dec. 16, 1997

Permalink: https://www.hzdr.de/publications/Publ-2481

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

Yankov, R. A.; Kaschny, J. R.; Fichtner, P. L. F.; Mücklich, A.; Kreißig, U.; Skorupa, W.

  • Lecture (Conference)
    10th Biennial Conf. on Insulating Films on Semiconductors, Stenungsund, Sweden, June 11 - 14, 1997

Permalink: https://www.hzdr.de/publications/Publ-2480

Ionenimplantation aus Vakuumbogenplasmen

Witke, W.; Siemroth, P.; Brückner, J.; Brutscher, J.; Richter, E.

  • Lecture (Conference)
    8. Bundesdeutsche Fachtagung Plasmatechnologie, Dresden, Sept. 14 - 17, 1997

Permalink: https://www.hzdr.de/publications/Publ-2479

Kristallgitter-Einbau implantierter Ionen in 6H-SiC

Wirth, H.; Voelskow, M.; Panknin, D.; Skorupa, W.

  • Lecture (Conference)
    DPG-Frühjahrstagung, Münster, March 17 - 21, 1997

Permalink: https://www.hzdr.de/publications/Publ-2478

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

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

Teilchenbeschleuniger - Grundlagen

Guratzsch, H.

Abstract

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

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

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

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

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

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

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

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

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

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

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

Willschütz, H.-G.

Abstract

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Ion beam sensitizing of titanium surfaces to hydroxyapatite formation

Pham, M. T.; Matz, W.; Reuther, H.; Richter, E.; Steiner, G.; Oswald, S.

Abstract

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

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

Roles of implantation parameters on the formation of expanded austenite

Parascandola, S.; Betzl, M.; Richter, E.; Möller, W.

Abstract

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

Stickstoffdiffusion in austenitischem Edelstahl unter Hochstrom-Ionenimplantation

Parascandola, S.; Günzel, R.; Grötzschel, R.; Richter, E.; Möller, W.

Abstract

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

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

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

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

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

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

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

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