Millimeter-wave radiometer diagnostics of harmonic electron cyclotron emission in the Levitated Dipole Experiment a

摘要

A 110/137 GHz radiometer pair with collimated antenna pattern is being used to diagnose optically thin harmonic electron cyclotron emission from hot electrons in LDX. Signal levels of 0.1–1 keV and 110/137 ratios of 2–4 stationary with ECRH power have been observed. The large plasma core magnetic field gradient causes all relevant harmonics to be simultaneously viewed over a ∠(k,B) angular range of 0°–90° representing a unique geometry for interpretation of ECE in terms of hot electron temperature and density. © 2010 American Institute of Physics Article Outline INTRODUCTION INSTRUMENTATION CALIBRATION MEASUREMENTS DISCUSSION