Design and first plasma measurements of the ITER-ECE prototype radiometer
- Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States)
- ITER-India/Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)
- Virginia Diodes, Inc., Charlottesville, Virginia 22902 (United States)
On ITER, second harmonic optically thick electron cyclotron emission (ECE) in the range of 220-340 GHz will supply the electron temperature (T{sub e}). To investigate the requirements and capabilities prescribed for the ITER system, a prototype radiometer covering this frequency range has been developed by Virginia Diodes, Inc. The first plasma measurements with this instrument have been carried out on the DIII-D tokamak, with lab bench tests and measurements of third through fifth harmonic ECE from high T{sub e} plasmas. At DIII-D the instrument shares the transmission line of the Michelson interferometer and can simultaneously acquire data. Comparison of the ECE radiation temperature from the absolutely calibrated Michelson and the prototype receiver shows that the ITER radiometer provides accurate measurements of the millimeter radiation across the instrument band.
- OSTI ID:
- 22596540
- Journal Information:
- Review of Scientific Instruments, Vol. 87, Issue 11; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
Electron cyclotron emission based q -profile measurement and concept for equilibrium reconstruction
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journal | June 2019 |
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