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2015 | 60 | 2 | 199-206
Tytuł artykułu

Selected methods of electron-and ion-diagnostics in tokamak scrape-off-layer

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
This invited paper considers reasons why exact measurements of fast electron and ion losses in tokamaks, and particularly i n a scrape-off-layer and near a divertor region, are necessary in order to master nuclear fusion energy production. Attention is also paid to direct measurements of escaping fusion products from D-D and D-T reactions, and in particular of fast alphas which might be used for plasma heating. The second part describes the generation of so-called runaway and ripple-born electrons which might induce high energy losses and cause severe damages of internal walls in fusion facilities. Advantages and disadvantages of different diagnostic methods applied for studies of such fast electrons are discussed. Particular attention is paid to development of a direct measuring technique based on the Cherenkov effect which might be induced by fast electrons in appropriate radiators. There are presented various versions of Cherenkov-type probes which have been developed by the NCBJ team and applied in different tokamak experiments. The third part is devoted to direct measurements of fast ions (including those produced by the nuclear fusion reactions) which can escape from a high-temperature plasma region. Investigation of fast fusion-produced protons from tokamak discharges is reported. New ion probes, which were developed by the NCBJ team, are also presented. For the first time there is given a detailed description of an ion pinhole camera, which enables irradiation of several nuclear track detectors during a single tokamak discharge, and a miniature Thomson-type mass-spectrometer, which can be used for ion measurements at plasma borders.
Słowa kluczowe
Wydawca

Czasopismo
Rocznik
Tom
60
Numer
2
Strony
199-206
Opis fizyczny
Daty
wydano
2015-06-01
otrzymano
2014-06-16
zaakceptowano
2014-11-15
online
2015-06-22
Twórcy
  • Plasma Studies Division (TJ5), National Centre for Nuclear Research (NCBJ), 7 Andrzeja Soltana Str., 05-400 Otwock/Swierk, Poland and Division of Magnetised Plasma, Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland, Tel.: +48 22 718 0537, Fax: +48 22 779 3481, marek.sadowski@ncbj.gov.pl
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  • 20. Szydlowski, A., Malinowska, A., Sadowski, M. J., Jaskóła, M., Korman, A., Van Wassenhove, G., Bonheure, G., Schweer, B., and the TEXTOR Team, Gałkowski, A., & Małek, K. (2008). Measurements of fusion-reaction protons in TEXTOR tokamak plasma by means of solid-state nuclear track detectors of the CR-39/PM-355 type. Radiat. Meas., 43, S290–S294. DOI: 10.1016/j.radmeas.2008.03.061.[WoS][Crossref]
  • 21. Sadowski, M. J. (2012). Progress in high-temperature plasma research at NCBJ (former IPJ) in Poland. Problems of Atomic Science and Technology, Seria: Plasma Phys., 82(6), 238–242.
  • 22. Sadowski, M. J., Czaus, K., Kwiatkowski, R., Malinowski, K., Składnik-Sadowska, E., Żebrowski, J., Paduch, M., Scholz, M., Garkusha, I. E., & Makhlay, V. A. (2013). Passive corpuscular diagnostics of charged particles emission from high-temperature plasma experiments. Problems of Atomic Science and Technology, Seria: Plasma Phys., 83(1), 252–257.
  • 23. Kwiatkowski, R., Malinowski, K., & Sadowski, M. J. (2014) Computer simulation of charged fusion-product trajectories and detection efficiency expected for future experiments within the COMPASS tokamak. Phys. Scripta, T161, 014013. DOI: 10.1088/0031-8949/2014/T161/014013.[WoS][Crossref]
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_1515_nuka-2015-0039
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