Conceptual design of a fast-ion D-alpha diagnostic on experimental advanced superconducting tokamak

J Huang; W W Heidbrink; B Wan; M G von Hellermann; Y Zhu; W Gao; C Wu; Y Li; J Fu; B Lyu; Y Yu; Y Shi; M Ye; L Hu; C Hu

doi:10.1063/1.4887820

Conceptual design of a fast-ion D-alpha diagnostic on experimental advanced superconducting tokamak

Rev Sci Instrum. 2014 Nov;85(11):11E407. doi: 10.1063/1.4887820.

Authors

J Huang¹, W W Heidbrink², B Wan¹, M G von Hellermann³, Y Zhu², W Gao⁴, C Wu⁴, Y Li⁴, J Fu⁴, B Lyu⁴, Y Yu⁴, Y Shi⁴, M Ye⁴, L Hu¹, C Hu¹

Affiliations

¹ Institute of Plasma Physics, Chinese Academy of Sciences, P.O. 1126, 230031 Hefei, Anhui, China.
² Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
³ FOM Institute DIFFER, P.O. BOX 1207, Nieuwegein 3430 BE, The Netherlands.
⁴ School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.

PMID: 25430314
DOI: 10.1063/1.4887820

Abstract

To investigate the fast ion behavior, a fast ion D-alpha (FIDA) diagnostic system has been planned and is presently under development on Experimental Advanced Superconducting Tokamak. The greatest challenges for the design of a FIDA diagnostic are its extremely low intensity levels, which are usually significantly below the continuum radiation level and several orders of magnitude below the bulk-ion thermal charge-exchange feature. Moreover, an overlaying Motional Stark Effect (MSE) feature in exactly the same wavelength range can interfere. The simulation of spectra code is used here to guide the design and evaluate the diagnostic performance. The details for the parameters of design and hardware are presented.