title: Gaseous electron multiplier-based soft x-ray plasma diagnostics development: Preliminary tests at ASDEX Upgrade.
abstract: A 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.
authors.affiliation: Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Chernyshova
authors.affiliation: Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Malinowski
authors.affiliation: Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw, Poland.
authors.forename: T
authors.initials: T
authors.lastname: Czarski
authors.affiliation: Institute of Electronic Systems, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Wojeński
authors.affiliation: Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Vezinet
authors.affiliation: Institute of Electronic Systems, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland.
authors.forename: K T
authors.initials: KT
authors.lastname: Poźniak
authors.affiliation: Institute of Electronic Systems, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland.
authors.forename: G
authors.initials: G
authors.lastname: Kasprowicz
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: D
authors.initials: D
authors.lastname: Mazon
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: A
authors.initials: A
authors.lastname: Jardin
authors.affiliation: Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Herrmann
authors.affiliation: Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw, Poland.
authors.forename: E
authors.initials: E
authors.lastname: Kowalska-Strzęciwilk
authors.affiliation: Institute of Electronic Systems, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland.
authors.forename: R
authors.initials: R
authors.lastname: Krawczyk
authors.affiliation: Institute of Electronic Systems, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland.
authors.forename: P
authors.initials: P
authors.lastname: Kolasiński
authors.affiliation: Institute of Electronic Systems, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland.
authors.forename: W
authors.initials: W
authors.lastname: Zabołotny
authors.affiliation: Institute of Electronic Systems, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland.
authors.forename: P
authors.initials: P
authors.lastname: Zienkiewicz
authors.affiliation: Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany.
authors.affiliation: Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany.