Gaseous electron multiplier-based soft x-ray plasma diagnostics development: Preliminary tests at ASDEX Upgrade
M. Chernyshova , Karol Malinowski , Tomasz Czarski , Andrzej Wojeński , D. Vezinet , Krzysztof Poźniak , Grzegorz Henryk Kasprowicz , D. Mazon , A. Jardin , A. Herrmann , E. Kowalska-Strzęciwilk , Rafał Krawczyk , Piotr Kolasiński , Wojciech Zabołotny , Paweł Zienkiewicz
AbstractA Gaseous Electron Multiplier (GEM)-based detector is being developed for soft X-ray diagnostics on tokamaks. Its main goal is to facilitate transport studies of impurities like tungsten. Such studies are very relevant to ITER, where the excessive accumulation of impurities in the plasma core should be avoided. This contribution provides details of the preliminary tests at ASDEX Upgrade (AUG) with a focus on the most important aspects for detector operation in harsh radiation environment. It was shown that both spatially and spectrally resolved data could be collected, in a reasonable agreement with other AUG diagnostics. Contributions to the GEM signal include also hard X-rays, gammas, and neutrons. First simulations of the effect of high-energy photons have helped understanding these contributions.
|Collective author||ASDEX Upgrade Team &Eurofusion MST1 Team|
|Total number of authors||250|
|Journal series||REVIEW OF SCIENTIFIC INSTRUMENTS, ISSN 0034-6748|
|Publication size in sheets||0.5|
|Score|| = 25.0, 27-03-2017, ArticleFromJournal|
= 30.0, 27-03-2017, ArticleFromJournal
|Publication indicators||: 2016 = 1.515 (2) - 2016=1.616 (5)|
|Citation count*||6 (2018-07-15)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.