title: Note: Upgrade of electron cyclotron emission imaging system and preliminary results on HL-2A tokamak.
abstract: The electron cyclotron emission imaging system on the HL-2A tokamak has been upgraded to 24 (poloidally) × 16 (radially) channels based on the previous 24 × 8 array. The measurement region can be flexibly shifted due to the independence of the two local oscillator sources, and the field of view can be adjusted easily by changing the position of the zoom lenses. The temporal resolution is about 2.5 μs and the achievable spatial resolution is 1 cm. After laboratory calibration, it was installed on HL-2A tokamak in 2014, and the local 2D mode structures of MHD activities were obtained for the first time.
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: M
authors.initials: M
authors.lastname: Jiang
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: Z B
authors.initials: ZB
authors.lastname: Shi
authors.affiliation: Department of Electrical and Computer Engineering, University of California, Davis, California 95616, USA.
authors.forename: C W
authors.initials: CW
authors.lastname: Domier
authors.affiliation: Department of Electrical and Computer Engineering, University of California, Davis, California 95616, USA.
authors.forename: N C
authors.initials: NC
authors.lastname: Luhmann
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: W L
authors.initials: WL
authors.lastname: Zhong
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: W
authors.initials: W
authors.lastname: Chen
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: Z T
authors.initials: ZT
authors.lastname: Liu
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: X T
authors.initials: XT
authors.lastname: Ding
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: Q W
authors.initials: QW
authors.lastname: Yang
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: B Y
authors.initials: BY
authors.lastname: Zhang
authors.affiliation: School of Physics and Chemistry, Xihua University, Chengdu 610039, China.
authors.forename: Z C
authors.initials: ZC
authors.lastname: Yang
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: P W
authors.initials: PW
authors.lastname: Shi
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: B Z
authors.initials: BZ
authors.lastname: Fu
authors.affiliation: Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Xu