Počet záznamů: 1  

Development of a Cherenkov-type diagnostic system to study runaway electrons within the COMPASS tokamak

  1. 1.
    0481460 - ÚFP 2018 RIV GB eng J - Článek v odborném periodiku
    Rabinski, M. - Jakubowski, L. - Malinowski, K. - Sadowski, M. J. - Zebrowski, J. - Jakubowski, M.J. - Mirowski, R. - Weinzettl, Vladimír - Ficker, Ondřej - Mlynář, Jan - Pánek, Radomír - Papřok, Richard - Vlainic, Milos
    Development of a Cherenkov-type diagnostic system to study runaway electrons within the COMPASS tokamak.
    Journal of Instrumentation. Roč. 12, October (2017), č. článku C10014. ISSN 1748-0221. E-ISSN 1748-0221.
    [European Conference on Plasma Diagnostics (ECPD2017)/2./. Bordeaux, 18.04.2017-21.04.2017]
    Grant CEP: GA MŠMT(CZ) LM2015045
    Institucionální podpora: RVO:61389021
    Klíčová slova: Nuclear instruments and methods for hot plasma diagnostics * Plasma diagnostics - probes
    Obor OECD: 2.11 Other engineering and technologies
    Impakt faktor: 1.258, rok: 2017
    http://iopscience.iop.org/article/10.1088/1748-0221/12/10/C10014

    Direct measurements of fast electrons, which are produced in high-temperature plasma and escape from tokamak-type facilities, are of particular interest for ITER and future fusion devices, where intense runaway electrons (RE) can significantly damage the firstwall components. Therefore, the runaway control and mitigation based on credible measuring methods should be developed
    already in present devices. A team from the National Centre for Nuclear Research (NCBJ), Poland, developed special probes equipped with Cherenkov-type detectors for measurements of the fast electrons within edge plasmas of tokamaks. Studies of the fast runaway electrons were extensively carried out at the COMPASS tokamak at the Institute of Plasma Physics (IPP) in Prague during experimental campaigns in 2014–2016. In order to investigate an electron-beam energy distribution a three-channel probe equipped with the Cherenkov-type detectors sensitive to electrons of different energies has been constructed. The measurements performed by means of these detectors showed that the first fast electron peak appears usually in the current ramp-up phase, even before the hard Xrays (HXR) pulse. Some electron signals can also be observed during subsequent HXR emissions.
    However, the most distinct electron peaks in all energy channels appear mainly during the plasma disruption. A correlation of Cherenkov signals with the MHD activity was also studied.
    Trvalý link: http://hdl.handle.net/11104/0277165

     
     
Počet záznamů: 1  

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