Millimeter-wave radiometer diagnostics of harmonic electron cyclotron emission in the Levitated Dipole Experiment |
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| Authors: | Woskov P P Kesner J Garnier D T Mauel M E |
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| Affiliation: | Plasma and Science Fusion Center, MIT, Cambridge, Massachusetts 02139, USA. ppwoskov@mit.edu |
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| Abstract: | 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 angle(k,B) angular range of 0°-90° representing a unique geometry for interpretation of ECE in terms of hot electron temperature and density. |
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