Experimental tests of an infrared video bolometer on Alcator C-Mod

Reinke, M. L.; Terry, J. L.; van Eden, G. G.; Peterson, B. J.; Mukai, K.; Gray, T. K.; Stratton, B. C.

doi:10.1063/1.5047050

Experimental tests of an infrared video bolometer on Alcator C-Mod

Journal Article · Wed Oct 17 00:00:00 EDT 2018 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.5047050· OSTI ID:1484207

^[1]; ^[2]; ^[3]; Peterson, B. J. ^[4]; Mukai, K. ^[4]; ^[1]; Stratton, B. C. ^[5]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Dutch Inst. for Fusion Energy, Eindhoven (The Netherlands)
Graduate Univ. for Advanced Studies (SOKENDAI), Toki (Japan). National Inst. for Fusion Science
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

A prototype of an infrared imaging bolometer (IRVB) was successfully tested on the Alcator C-Mod tokamak at the end of its 2016 campaign. The IRVB method interprets the power radiated from the plasma by measuring the temperature rise of a thin, ~2 μm, Pt absorber that is placed in the torus vacuum and exposed, using a pinhole camera, to the full-spectrum of plasma’s photon emission. The IRVB installed on C-Mod viewed the poloidal cross section of the core plasma and observed Ohmic and ion cyclotron range of frequency (ICRF)-heated plasmas. Analysis of total radiated power and on-axis emissivity from IRVB is summarized, and quantitative comparisons made to data from both resistive bolometers and AXUV diodes. IRVB results are clearly within a factor of two, but additional effort is needed for it to be used to fully support power exhaust research. The IRVB is shown to be immune to electromagnetic interference from ICRF which strongly impacts C-Mod’s resistive bolometers. Results of the bench-top calibration are summarized, including a novel temperature calibration method useful for IRVBs.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: AC05-00OR22725; FC02-99ER54512; SC0014264

OSTI ID:: 1484207

Alternate ID(s):: OSTI ID: 1477914

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 89; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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