Runaway electrons diagnostics using segmented semiconductor detectors

0509566 - ÚFP 2020 RIV NL eng J - Journal Article
Svihra, P. - Břeň, D. - Casolari, Andrea - Čeřovský, Jaroslav - Dhyani, P. - Farník, Michal - Ficker, Ondřej - Havránek, M. - Hejtmanek, M. - Janoška, Z. - Kafka, V. - Kulhánek, Petr - Linhart, V. - Tomešová, Eva - Marčišovská, M. - Marcisovský, M. - Mlynář, Jan - Neue, G. - Novotný, L. - Svoboda, V. - Tomášek, L. - Urban, Jakub - Vančura, P. - Varju, Jozef - Vrba, V. - Weinzettl, Vladimír
Runaway electrons diagnostics using segmented semiconductor detectors.
Fusion Engineering and Design. Roč. 146, September (2019), s. 316-319. ISSN 0920-3796. E-ISSN 1873-7196
R&D Projects: GA ČR(CZ) GA18-02482S; GA MŠMT(CZ) LM2015045
Institutional support: RVO:61389021
Keywords : Runaway electrons * Semiconductor detectors * Tokamaks
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 1.692, year: 2019
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/abs/pii/S0920379618308196?via%3Dihub

A novel application of strip and pixel silicon radiation detectors for study and characterization of run-away electron events in tokamaks is presented. Main goal was to monitor runaway electrons both directly and indirectly. The strip detector was placed inside the tokamak vacuum chamber in order to monitor the run-away electrons directly. Whereas the pixel detector was placed outside the tokamak chamber behind a pin hole for monitoring the run-away electrons indirectly via radiation produce by interaction of the electrons with the plasma facing material. Results obtained using the silicon detectors are compared with already existing diagnostic methods consisting of scintillation devices detecting X-rays and photo-neutrons, providing the same results in the observable comparisons. Tests with the pixel detector proved that the pinhole camera is able to extract spatial information of interaction point (a place where the runaway electrons hit on the facing material) and the strip detectors indicate presence of additional signal from throughout the discharge. The performed experiments are innovative, illustrating possible development of new and easy to use diagnostic method.
Permanent Link: http://hdl.handle.net/11104/0300275