Effect of charging-up and regular usage on performance of the triple GEM detector to be employed for plasma radiation monitoring
| Autor: | Ewa Kowalska-Strzęciwilk, Maryna Chernyshova, Karol Malinowski, Yevgen Melikhov, Rafal Dominik Krawczyk, Tomasz Czarski, Iraida N. Demchenko, Andrzej Wojeński |
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| Jazyk: | angličtina |
| Předmět: |
Thermonuclear fusion
Materials science business.industry Physics::Instrumentation and Detectors Mechanical Engineering Detector Plasma Radiation 01 natural sciences 030218 nuclear medicine & medical imaging 010305 fluids & plasmas 03 medical and health sciences 0302 clinical medicine Optics Semiconductor Nuclear Energy and Engineering Physics::Plasma Physics 0103 physical sciences Gas electron multiplier General Materials Science Neutron Detectors and Experimental Techniques business Civil and Structural Engineering Diode |
| Zdroj: | Fusion Engineering and Design |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2020.111755 |
| Popis: | After the problem of high-temperature plasma confinement, construction of diagnostics that is able to identify plasma contamination with impurities and to determine impurity distribution is another critically important issue. Solution of this problem would enable progress towards the success in controlled thermonuclear fusion. A new diagnostics, based on Gas Electron Multiplier (GEM) technology, has been recently developed for poloidal tomography focused on radiation of the metal impurities by monitoring in Soft X-Ray (SXR) region. GEM based detectors would undergo much less damage by neutrons than standard semiconductor diodes which results in better operational stability. This paper emphasizes the results of the latest examination of this type of detectors, showing influence of the charging-up effect on the detector performance and its physical properties for expected plasma radiation intensity. In addition, an undesired influence of aging of the detector window’s material on the performance of the GEM detector is also shown: regular (moderate or active) usage could lead to changes of material’s morphology as well as its composition. This study confirms the importance of further research into material’s optimization of GEM detectors used as a base for SXR tomographic diagnostics aimed to work under different plasma radiation conditions. |
| Databáze: | OpenAIRE |
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