Fast-ion D α spectrum diagnostic in the EAST

In toroidal magnetic fusion devices, fast-ion D-alpha diagnostic (FIDA) is a powerful method to study the fast-ion feature. The fast-ioncharacteristics can be inferred from the Doppler shiftedspectrum of Dα light according to charge exchange recombination process between fast ions and probebeam. Since conceptual design presented in the last HTPD conference, significant progress has been made to apply FIDAsystems on the Experimental Advanced SuperconductingTokamak (EAST). Both co-current and counter-current neutralbeam injectors are available, and each can deliver 2-4 MWbeam power with 50-80 keVbeam energy. Presently, two sets of high throughputspectrometersystems have been installed on EAST, allowing to capture passing and trapped fast-ioncharacteristics simultaneously, using Kaiser HoloSpec transmissiongrating spectrometer and Bunkoukeiki FLP-200 volume phase holographicspectrometer coupled with Princeton Instruments ProEM 1024B eXcelon and Andor DU-888 iXon3 1024CCDcamera, respectively. This paper will present the details of the hardware descriptions and experimentalspectrum.

Source: Review of Scientific Instruments - September 26, 2016 Category: Physics Authors: Y. M. Hou, C. R. Wu, J. Huang, W. W. Heidbrink, M. G. von Hellermann, Z. Xu, Z. Jin, J. F. Chang, Y. B. Zhu, W. Gao, Y. J. Chen, B. Lyu, R. J. Hu, P. F. Zhang, L. Zhang, W. Gao, Z. W. Wu, Y. Yu, M. Y. Ye and EAST Team Source Type: research