Optical measurement of the edge plasma around a molybdenum limiter in the TPE-1RM20 Reversed-field-Pinch Machine

摘要

The emission spectrum of deuterium atoms (D_α) was measured on the surface of a movalble molybdenum limiter in the reversed field pinch machine TPE-1RM20. The observed line profile was fitted by a combination of two Gaussian functions with different temperature. The temperatures derived from thefitted functions were approximately 5000K and 50000K. The lower and higher components may correspond to the temperature of neutral atoms around edge region and the temperature of charge- exchange neutral, respectively.