Electron Cyclotron Emission Diagnostic Systems for electron Temperature Perturbation Measurement in JT-60U

摘要

In JT-60U, there are three electron cyclotron emission (ECE) diagnostic systems [1], which are the Fourier transform spectrometer system [2], the 20-channel grating polychromator system [3] and the 24-channel heterodyne radiometer system [4]. The Fourier transform spectrometer system is absolutely calibrated using liquid nitrogen, and its result is used for relative calibration of the grating polychromator system and the heterodyne radiometer system. The grating polychromator system and the heterodyne radiometer system, whose temporal resolution is 20 #mu#s, are used for the measurement of electron temperature perturbations. In this paper, recent development and results of these ECE diagnostic system are described.