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

Abstract

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.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [4];  [4]; ORCiD logo [1];  [5]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
  3. Dutch Inst. for Fusion Energy, Eindhoven (The Netherlands)
  4. Graduate Univ. for Advanced Studies (SOKENDAI), Toki (Japan). National Inst. for Fusion Science
  5. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1484207
Alternate Identifier(s):
OSTI ID: 1477914
Grant/Contract Number:  
AC05-00OR22725; FC02-99ER54512; SC0014264
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 89; Journal Issue: 10; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 47 OTHER INSTRUMENTATION

Citation Formats

Reinke, M. L., Terry, J. L., van Eden, G. G., Peterson, B. J., Mukai, K., Gray, T. K., and Stratton, B. C. Experimental tests of an infrared video bolometer on Alcator C-Mod. United States: N. p., 2018. Web. doi:10.1063/1.5047050.
Reinke, M. L., Terry, J. L., van Eden, G. G., Peterson, B. J., Mukai, K., Gray, T. K., & Stratton, B. C. Experimental tests of an infrared video bolometer on Alcator C-Mod. United States. doi:10.1063/1.5047050.
Reinke, M. L., Terry, J. L., van Eden, G. G., Peterson, B. J., Mukai, K., Gray, T. K., and Stratton, B. C. Wed . "Experimental tests of an infrared video bolometer on Alcator C-Mod". United States. doi:10.1063/1.5047050.
@article{osti_1484207,
title = {Experimental tests of an infrared video bolometer on Alcator C-Mod},
author = {Reinke, M. L. and Terry, J. L. and van Eden, G. G. and Peterson, B. J. and Mukai, K. and Gray, T. K. and Stratton, B. C.},
abstractNote = {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.},
doi = {10.1063/1.5047050},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 10,
volume = 89,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 17, 2019
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