Chen YH, Yang XY, Lin C, Wang L, Xu M, Wang XG, Xiao CJ. 2D electron density profile measurement in tokamak by laser-accelerated ion-beam probe.
THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014;
85:11D860. [PMID:
25430273 DOI:
10.1063/1.4895098]
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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.
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