The upgraded heavy ion beam probe diagnostics on the T-10 tokamak

2nd Conference on Plasma & Laser Research and Technologies

Drabinskii, M.A.^1,2 ; Khabanov, P.O.^1,3 ; Melnikov, A.V.^1,4 ; Krupnik, L.I.^5 ; Kozachek, A.S.^5 ; Komarov, A.D.^5 ; Zhezhera, A.I.^5

National Research Centre, Kurchatov Institute, Akademika Kurchatova pl. 1, Moscow

123182, Russia^1

Bauman Moscow State Technical University, ul. Baumanskaya 2-ya 5, Moscow

105005, Russia^2

Moscow Institute of Physics and Technology, Institutskiy per. 9, Dolgoprudny, Moscow Region

141700, Russia^3

National Research Nuclear University MEPhI, Kashirskoe highway 31, Moscow

115409, Russia^4

National Science Center, Kharkov Institute of Physics and Technology, Akademicheskaya St. 1, Kharkov

61108, Ukraine^5

关键词: Broadband turbulence;    Electron cyclotron resonance heating;    Frequency ranges;    Geodesic acoustic modes;    Heavy ion beam probe diagnostics;    Heavy ion beam probes;    Quasi-coherent modes;    Research center;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/747/1/012017/pdf
DOI  :  10.1088/1742-6596/747/1/012017

来源: IOP

【 摘 要 】

The upgraded Heavy Ion Beam Probe (HIBP) diagnostics on the T-10 tokamak (National Research Center 'Kurchatov Institute') is presented. HIBP is a powerful tool to study electric potential in the core and edge plasmas along with broadband turbulence and quasicoherent modes such as Geodesic Acoustic Mode (GAM) and Alfven Eigenmode (AE). To study broadband turbulence and AEs, which can be driven by fast electrons in regimes with auxiliary Electron Cyclotron Resonance Heating the frequency range of about several hundred kHz is needed. The upgrade is focused on the extension of the frequency range of HIBP signals up to 500 kHz, and on increasing of density operating limit up to 5-1019m-3. It becomes possible due to a newly designed emitter-extractor unit of HIBP accelerator aiming to provide the primary beam with the current of 300 pA at the energy of 300 keV and diameter of 7-10 mm. The new in-vessel elements of a primary beamline - wire sensor and Faraday cup - were upgraded accordingly to be able to deliver the probing beam with advanced parameters to the plasma.