Details

Autor(en) / Beteiligte

• Deng, W.C.
• Shi, Z.B.
• Shi, P.W.
• Yang, Z.C.
• Chen, W.
• Huang, M.
• Zhang, F.
• Yu, X.
• Fang, K.R.
• Jiang, M.
• Wen, J.
• Tong, R.H.
• Zhong, W.L.
• Xu, M.

Titel

Development of a 105 GHz fast ion collective Thomson scattering diagnostic on HL-2A tokamak

Ist Teil von

• Journal of instrumentation, 2022-02, Vol.17 (2), p.C02006

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Abstract Collective Thomson Scattering (CTS) diagnostic technique has great potential in measuring velocity distribution of fast ions in magnetically confined fusion devices. Here we present design and development of a 105 GHz fast ion CTS system on HL-2A tokamak. The gyrotron with high power transmission/antenna is used to generate a probe beam. To better focus the scattering beam and effectively avoid the stray contamination, a W-band Cassegrain antenna is utilized to receive the scattering beam from the central chord. The scattering signal is estimated at 10–30 eV and the frequency broadening is less than 2 GHz for typical HL-2A plasmas. To pick out the weak signals, a multi-channel receiver system with working frequency of 103–107 GHz is developed. The steerable direction of probe beam enables that the scattering volume can move from core to edge, with which the spatial resolution range varies from 70 mm at low field side to 260 mm at high field side.