title: 2D electron density profile measurement in tokamak by laser-accelerated ion-beam probe.
abstract: A new concept of Heavy Ion Beam Probe (HIBP) diagnostic has been proposed, of which the key is to replace the electrostatic accelerator of traditional HIBP by a laser-driven ion accelerator. Due to the large energy spread of ions, the laser-accelerated HIBP can measure the two-dimensional (2D) electron density profile of tokamak plasma. In a preliminary simulation, a 2D density profile was reconstructed with a spatial resolution of about 2 cm, and with the error below 15% in the core region. Diagnostics of 2D density fluctuation is also discussed.
authors.affiliation: State Key Lab of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China.
authors.forename: Y H
authors.initials: YH
authors.lastname: Chen
authors.affiliation: State Key Lab of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China.
authors.forename: X Y
authors.initials: XY
authors.lastname: Yang
authors.affiliation: State Key Lab of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China.
authors.forename: C
authors.initials: C
authors.lastname: Lin
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, P. O. Box 603, Beijing 100190, China.
authors.forename: L
authors.initials: L
authors.lastname: Wang
authors.affiliation: Center for Fusion Science of Southwestern Institute of Physics, P. O. Box 432, Chengdu 610041, China.
authors.forename: M
authors.initials: M
authors.lastname: Xu
authors.affiliation: State Key Lab of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China.
authors.forename: X G
authors.initials: XG
authors.lastname: Wang
authors.affiliation: State Key Lab of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China.
authors.forename: C J
authors.initials: CJ
authors.lastname: Xiao