Laser Thomson scattering system applicable to low-temperature plasma in the divertor simulator MAP-II

Okamoto, A.; Kado, S.; Kajita, S.; Tanaka, S.
November 2005
Review of Scientific Instruments;Nov2005, Vol. 76 Issue 11, p116106
Academic Journal
A laser Thomson scattering system was developed for the measurement of electron temperature in low-temperature recombining plasmas. The system is equipped with a double monochromator instead of an interference filter array to obtain narrow Doppler broadening. The system was applied to electron temperature measurement in the divertor simulator MAP-II. When the electron temperature is lowered to 2 eV by puffing hydrogen gas, a signature of hydrogen molecular-assisted recombination (H2-MAR) is observed.


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