A reconstruction method based on evolution of partial differential equation for the Laser-driven Ion-beam Trace Probe (LITP)

X Yang; T Xu; C Xiao; Y Chen; T Wang; C Lin; M Xu; Y Yu; L Wang; X Wang

doi:10.1063/1.5039426

A reconstruction method based on evolution of partial differential equation for the Laser-driven Ion-beam Trace Probe (LITP)

Rev Sci Instrum. 2018 Oct;89(10):10I130. doi: 10.1063/1.5039426.

Authors

X Yang¹, T Xu¹, C Xiao¹, Y Chen¹, T Wang², C Lin¹, M Xu², Y Yu³, L Wang⁴, X Wang⁵

Affiliations

¹ State Key Lab of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China.
² Center for Fusion Science of Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China.
³ School of Physics, University of Science and Technology of China, Hefei 230026, China.
⁴ Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China.
⁵ Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin 150001, China.

PMID: 30399900
DOI: 10.1063/1.5039426

Abstract

The Laser-driven Ion-beam Trace Probe (LITP) is a new poloidal magnetic field (B_p) diagnostic method in tokamak devices. It measures the ion displacements which are linear integrations of B_p along the ion beam traces, and a proper tomography method is necessary for the B_p reconstruction. A tomography method based on the solution of partial differential equation is used. The diffusion term and perturbation term are used to avoid the divergence and smooth the reconstructed results. Numerical results show that both the diffusion term and the perturbation term obviously improved the reconstruction results of B_p for LITP.