title: Development of the charge exchange recombination spectroscopy and the beam emission spectroscopy on the EAST tokamak.
abstract: Charge eXchange Recombination Spectroscopy (CXRS) and Beam Emission Spectroscopy (BES) diagnostics based on a heating neutral beam have recently been installed on EAST to provide local measurements of ion temperature, velocity, and density. The system design features common light collection optics for CXRS and BES, background channels for the toroidal views, multi-chord viewing sightlines, and high throughput lens-based spectrometers with good signal to noise ratio for high time resolution measurements. Additionally, two spectrometers each has a tunable grating to observe any wavelength of interest are used for the CXRS and one utilizes a fixed-wavelength grating to achieve higher diffraction efficiency for the BES system. A real-time wavelength correction is implemented to achieve a high-accuracy wavelength calibration. Alignment and calibration are performed. Initial performance test results are presented.
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Li
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: J
authors.initials: J
authors.lastname: Fu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: B
authors.initials: B
authors.lastname: Lyu
authors.affiliation: School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: X W
authors.initials: XW
authors.lastname: Du
authors.affiliation: School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: C Y
authors.initials: CY
authors.lastname: Li
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: X H
authors.initials: XH
authors.lastname: Yin
authors.affiliation: School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Yu
authors.affiliation: School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Q P
authors.initials: QP
authors.lastname: Wang
authors.affiliation: FOM-Institute for Plasma Physics "Rijnhuizen," Association EURATOM, Trilateral Euregio Cluster, 3430BE Nieuwegein, The Netherlands.
authors.forename: M
authors.initials: M
authors.lastname: von Hellermann
authors.affiliation: School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Shi
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: M Y
authors.initials: MY
authors.lastname: Ye
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: B N
authors.initials: BN
authors.lastname: Wan