Measuring issues in the GEM detector system for fusion plasma imaging

作者：Czarski T^*; Chernyshova M; Malinowski K; Pozniak K T; Kasprowicz G; Kolasinski P; Krawczyk R; Wojenski A; Linczuk P; Zabolotny W; Jardin A; Mazon D; Jakubowska K; Boutoux G; Burgy F; Hulin S; Batani D

来源：Journal of Instrumentation, 2018, 13(08): C08001.

DOI：10.1088/1748-0221/13/08/C08001

• Data acquisition concepts
• Digital signal processing (DSP)
• Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc)

A measurement systems based on GEM(Gas Electron Multiplier) detectors is developed for X-ray diagnostics of tokamak plasmas. The multi-channel setup is designed for evaluation the X-ray source distribution in energy, space and time. The paper deals with the development of a fast analysis and elaboration of collected data, including charge cluster identification and the separation of coincided signals. The proposed algorithm can be applied iteratively for series of superimposed pulses. On-line separation of overlapped signals was implemented applying the FPGA (FPGA -Field-Programmable Gate Array) technology with relatively simple firmware processing. We demonstrate reconstruction of coinciding signals and retrieval of radiation source properties and energy spectra.

• 出版日期2018-8
• 单位中国地震局