Design and characterization of a prototype divertor viewing infrared video bolometer for NSTX-U
Abstract
The InfraRed Video Bolometer (IRVB) is a powerful tool to measure radiated power in magnetically confined plasmas due to its ability to obtain 2D images of plasma emission using a technique that is compatible with the fusion nuclear environment. A prototype IRVB has been developed and installed on NSTX-U to view the lower divertor. The IRVB is a pinhole camera which images radiation from the plasma onto a 2.5 μm thick, 9 × 7 cm2 Pt foil and monitors the resulting spatio-temporal temperature evolution using an IR camera. The power flux incident on the foil is calculated by solving the 2D+time heat diffusion equation, using the foil’s calibrated thermal properties. An optimized, high frame rate IRVB, is quantitatively compared to results from a resistive bolometer on the bench using a modulated 405 nm laser beam with variable power density and square wave modulation from 0.2 Hz to 250 Hz. The design of the NSTX-U system and benchtop characterization are presented where signal-to-noise ratios are assessed using three different IR cameras: FLIR A655sc, FLIR A6751sc, and SBF-161. The sensitivity of the IRVB equipped with the SBF-161 camera is found to be high enough to measure radiation features in the NSTX-U lowermore »
- Authors:
-
[1];
- Dutch Institute for Fundamental Energy Research, AJ Eindhoven (The Netherlands)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- National Institute for Fusion Science, Toki (Japan)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- National Institutes for Quantum and Radiological Science and Technology, Naka (Japan)
- Institute for Plasma Research, Gujarat (India)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1368686
- Alternate Identifier(s):
- OSTI ID: 1412066
- Grant/Contract Number:
- AC02-09CH11466; AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 87; Journal Issue: 11; Journal ID: ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Citation Formats
van Eden, G. G., Reinke, M. L., Peterson, B. J., Gray, T. K., Delgado-Aparicio, L. F., Jaworski, M. A., Lore, J., Mukai, K., Sano, R., Pandya, S. N., and Morgan, T. W. Design and characterization of a prototype divertor viewing infrared video bolometer for NSTX-U. United States: N. p., 2016.
Web. doi:10.1063/1.4955487.
van Eden, G. G., Reinke, M. L., Peterson, B. J., Gray, T. K., Delgado-Aparicio, L. F., Jaworski, M. A., Lore, J., Mukai, K., Sano, R., Pandya, S. N., & Morgan, T. W. Design and characterization of a prototype divertor viewing infrared video bolometer for NSTX-U. United States. https://doi.org/10.1063/1.4955487
van Eden, G. G., Reinke, M. L., Peterson, B. J., Gray, T. K., Delgado-Aparicio, L. F., Jaworski, M. A., Lore, J., Mukai, K., Sano, R., Pandya, S. N., and Morgan, T. W. Tue .
"Design and characterization of a prototype divertor viewing infrared video bolometer for NSTX-U". United States. https://doi.org/10.1063/1.4955487. https://www.osti.gov/servlets/purl/1368686.
@article{osti_1368686,
title = {Design and characterization of a prototype divertor viewing infrared video bolometer for NSTX-U},
author = {van Eden, G. G. and Reinke, M. L. and Peterson, B. J. and Gray, T. K. and Delgado-Aparicio, L. F. and Jaworski, M. A. and Lore, J. and Mukai, K. and Sano, R. and Pandya, S. N. and Morgan, T. W.},
abstractNote = {The InfraRed Video Bolometer (IRVB) is a powerful tool to measure radiated power in magnetically confined plasmas due to its ability to obtain 2D images of plasma emission using a technique that is compatible with the fusion nuclear environment. A prototype IRVB has been developed and installed on NSTX-U to view the lower divertor. The IRVB is a pinhole camera which images radiation from the plasma onto a 2.5 μm thick, 9 × 7 cm2 Pt foil and monitors the resulting spatio-temporal temperature evolution using an IR camera. The power flux incident on the foil is calculated by solving the 2D+time heat diffusion equation, using the foil’s calibrated thermal properties. An optimized, high frame rate IRVB, is quantitatively compared to results from a resistive bolometer on the bench using a modulated 405 nm laser beam with variable power density and square wave modulation from 0.2 Hz to 250 Hz. The design of the NSTX-U system and benchtop characterization are presented where signal-to-noise ratios are assessed using three different IR cameras: FLIR A655sc, FLIR A6751sc, and SBF-161. The sensitivity of the IRVB equipped with the SBF-161 camera is found to be high enough to measure radiation features in the NSTX-U lower divertor as estimated using SOLPS modeling. The optimized IRVB has a frame rate up to 50 Hz, high enough to distinguish radiation during edge-localized-modes (ELMs) from that between ELMs.},
doi = {10.1063/1.4955487},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = {Tue Jul 12 00:00:00 EDT 2016},
month = {Tue Jul 12 00:00:00 EDT 2016}
}
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Works referenced in this record:
Comparison of Au and Pt Foils for an Imaging Bolometer
journal, January 2010
- Peterson, Byron J.; Drapiko, Evgeny A.; Seo, Dongcheol
- Plasma and Fusion Research, Vol. 5
Calibration and sensitivity of the infrared imaging video bolometer
journal, March 2003
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- Review of Scientific Instruments, Vol. 74, Issue 3
A reconsideration of the noise equivalent power and the data analysis procedure for the infrared imaging video bolometers
journal, December 2014
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- Review of Scientific Instruments, Vol. 85, Issue 12
Foil Calibration for IR Imaging Bolometer by Laser Irradiation
journal, January 2012
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journal, October 2008
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Bolometric imaging of detached plasmas in LHD
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Simulation of the Edge Plasma in Tokamaks
journal, January 2004
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Works referencing / citing this record:
Experimental tests of an infrared video bolometer on Alcator C-Mod
journal, October 2018
- Reinke, M. L.; Terry, J. L.; van Eden, G. G.
- Review of Scientific Instruments, Vol. 89, Issue 10
Plasma radiation studies in Magnum-PSI using resistive bolometry
journal, July 2018
- van Eden, G. G.; Reinke, M. L.; Brons, S.
- Nuclear Fusion, Vol. 58, Issue 10