论文信息 - Multipoint Thomson scattering

Multipoint Thomson scattering

A new detector system for single shot measurement of electron temperature and density profiles in a magnetically confined plasma has been developed. Preliminary results have been obtained with this multipoint Thomson scattering diagnostic on Torus II, a high beta tokamak. It has a density range of 2×1013 cm−3≲ne≲5×1014 cm−3 in the preionization phase and 5×1014 cm−3≲ne≲2×1015 cm−3 in the tokamak phase. Electron temperatures range from Te≳6 eV in the preionization phase to Te≲80 eV in the tokamak phase. The detector used is a multianode microchannel plate (MCP) with a 25‐mm‐diam multialkali photocathode. A 10×10 array of anodes collects the current, which has been amplified by as much as 106. Each anode is independent, so the MCP can be viewed as a parallel array of 100 independent photomultiplier tubes.

G. A. Navratil | F. M. Levinton

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