title: Validation of fast-ion D-alpha spectrum measurements during EAST neutral-beam heated plasmas.
abstract: To investigate the fast ion behavior, a fast ion D-alpha (FIDA) diagnostic system has been installed on EAST. Fast ion features can be inferred from the Doppler shifted spectrum of Balmer-alpha light from energetic hydrogenic atoms. This paper will focus on the validation of FIDA measurements performed using MHD-quiescent discharges in 2015 campaign. Two codes have been applied to calculate the Dαspectrum: one is a Monte Carlo code, Fortran 90 version FIDASIM, and the other is an analytical code, Simulation of Spectra (SOS). The predicted SOS fast-ion spectrum agrees well with the measurement; however, the level of fast-ion part from FIDASIM is lower. The discrepancy is possibly due to the difference between FIDASIM and SOS velocity distribution function. The details will be presented in the paper to primarily address comparisons of predicted and observed spectrum shapes/amplitudes.
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: J
authors.initials: J
authors.lastname: Huang
authors.affiliation: University of California, Irvine, California 92697, USA.
authors.forename: W W
authors.initials: WW
authors.lastname: Heidbrink
authors.affiliation: Diagnostic Team, ITER Organization, Route de Vinon-sur-Verdon 13067 St. Paul Lez Durance, France.
authors.forename: M G
authors.initials: MG
authors.lastname: von Hellermann
authors.affiliation: University of California, Irvine, California 92697, USA.
authors.forename: L
authors.initials: L
authors.lastname: Stagner
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: C R
authors.initials: CR
authors.lastname: Wu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: Y M
authors.initials: YM
authors.lastname: Hou
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: J F
authors.initials: JF
authors.lastname: Chang
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: S Y
authors.initials: SY
authors.lastname: Ding
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Chen
authors.affiliation: University of California, Irvine, California 92697, USA.
authors.forename: Y B
authors.initials: YB
authors.lastname: Zhu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Jin
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: W
authors.initials: W
authors.lastname: Gao
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: J F
authors.initials: JF
authors.lastname: Wang
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: B
authors.initials: B
authors.lastname: Lyu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: Q
authors.initials: Q
authors.lastname: Zang
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: G Q
authors.initials: GQ
authors.lastname: Zhong
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: L
authors.initials: L
authors.lastname: Hu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.
authors.forename: B
authors.initials: B
authors.lastname: Wan
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, Anhui, China.