Počet záznamů: 1

Modelling of impurity deposition in gaps of castellated surfaces with the 3D-GAPS code

  1. 1.
    0349592 - UFP-V 2011 RIV GB eng J - Článek v odborném periodiku
    Matveev, D. - Kirschner, A. - Litnovsky, A. - Borodin, D. - Philipps, V. - Van Oost, G. - Komm, Michael
    Modelling of impurity deposition in gaps of castellated surfaces with the 3D-GAPS code.
    Plasma Physics and Controlled Fusion. Roč. 52, č. 7 (2010), 075007-075007 ISSN 0741-3335
    Grant CEP: GA ČR GA202/07/0044
    Výzkumný záměr: CEZ:AV0Z20430508
    Klíčová slova: TEXTOR * simulation * PIC * impurity * transport * gap * divertor * limiter * retention
    Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
    Impakt faktor: 2.466, rok: 2010
    http://iopscience.iop.org/0741-3335/52/7/075007/pdf/0741-3335_52_7_075007.pdf http://iopscience.iop.org/0741-3335/52/7/075007/pdf/0741-3335_52_7_075007.pdf

    The Monte-Carlo neutral transport code 3D-GAPS is described. The code models impurity transport and deposition in remote areas, such as gaps between cells of castellated plasma-facing surfaces. A step-by-step investigation of the interplay of different processes that may influence the deposition inside gaps, namely particle reflection, elastic neutral collisions, different particle sources, chemical erosion and plasma penetration into gaps, is presented. Examples of modelling results in application to the TEXTOR experiment with a castellated test limiter are provided. It is shown that only with the assumption of the presence of species with different reflection probabilities, do simulated carbon deposition profiles agree with experimental observations for side surfaces of the gaps. These species can be attributed to different particle sources, e.g. carbon atoms and hydrocarbon radicals. Background carbon ions and atoms have low and moderate values of the reflection coefficient(R <_0.6
    Trvalý link: http://hdl.handle.net/11104/0189787