Design and first plasma measurements of the ITER-ECE prototype radiometer

Journal Article · Tue Aug 09 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4960163· OSTI ID:1371880

Austin, M. E. ^[1]; Brookman, M. W.  ^[1]; Rowan, W. L. ^[1]; Danani, S. ^[2]; Bryerton, E. W. ^[3]; Dougherty, P. ^[3]

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1. Univ. of Texas, Austin, TX (United States). Inst. for Fusion Studies
2. ITER Organization, Gandhinagar (India). Inst. for Plasma Research
3. Virginia Diodes, Inc., Charlottesville, VA (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_e). In order 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_e plasmas. At DIII-D the instrument shares the transmission line of the Michelson interferometer and can simultaneously acquire data. In our comparison of the ECE radiation temperature from the absolutely calibrated Michelson and the prototype receiver we show that the ITER radiometer provides accurate measurements of the millimeter radiation across the instrument band.

• Research Organization: General Atomics, San Diego, CA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: FC02-04ER54698; FG02-97ER54415; S013464-C
• OSTI ID: 1371880
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 11; Related Information: M.E. Austin, M.W. Brookman, W.L. Rowan, S. Danani, E.W. Bryerton, and P. Dougherty, "Design and first plasma measurements of the ITER-ECE prototype radiometer", Rev. Sci. Instr. 87, 11E111 (2016); ISSN 0034-6748
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY