2D electron density profile measurement in tokamak by laser-accelerated ion-beam probe

Y H Chen; X Y Yang; C Lin; L Wang; M Xu; X G Wang; C J Xiao

doi:10.1063/1.4895098

2D electron density profile measurement in tokamak by laser-accelerated ion-beam probe

Rev Sci Instrum. 2014 Nov;85(11):11D860. doi: 10.1063/1.4895098.

Authors

Y H Chen¹, X Y Yang¹, C Lin¹, L Wang², M Xu³, X G Wang¹, C J Xiao¹

Affiliations

¹ State Key Lab of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China.
² Institute of Physics, Chinese Academy of Sciences, P. O. Box 603, Beijing 100190, China.
³ Center for Fusion Science of Southwestern Institute of Physics, P. O. Box 432, Chengdu 610041, China.

PMID: 25430273
DOI: 10.1063/1.4895098

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.