Recent Advances in Thomson Scattering: High Repetition Rate Thomson Scattering Diagnostics on Large Plasma Devices

摘要

Periodically pulsed Thomson scattering which covers the whole duration of a tokamak discharge is described. Time resolution is 17 msec. Reliability is proved by operating for more than one year. The YAG laser pulses exceed 1 million single shots. Extension to a spatial multipoint system yields the evolution in time of temperature and density profiles. It is suggested that using a periodically pulsed Nd:YAG laser and silicon avalanche photodiodes fulfills the requirements of fusion devices.