Design and implementation of a prototype infrared video bolometer (IRVB) in MAST Upgrade

Federici, Fabio; Reinke, Matthew L.; Lipschultz, Bruce; Thornton, Andrew J.; Harrison, James R.; Lovell, Jack J.; Bernert, Matthias

doi:10.1063/5.0128768

Design and implementation of a prototype infrared video bolometer (IRVB) in MAST Upgrade

Journal Article · Wed Mar 01 00:00:00 EST 2023 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0128768· OSTI ID:1959615

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Univ. of York (United Kingdom); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); United Kingdom Atomic Energy Authority (UKAEA), Abingdon (United Kingdom). Culham Centre for Fusion Energy
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Commonwealth Fusion Systems, Cambridge, MA (United States)
Univ. of York (United Kingdom)
United Kingdom Atomic Energy Authority (UKAEA), Abingdon (United Kingdom). Culham Centre for Fusion Energy
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); United Kingdom Atomic Energy Authority (UKAEA), Abingdon (United Kingdom). Culham Centre for Fusion Energy
Max Planck Institute for Plasma Physics, Garching (Germany)

A prototype infrared video bolometer (IRVB) was successfully deployed in the Mega Ampere Spherical Tokamak Upgrade (MAST Upgrade or MAST-U), the first deployment of such a diagnostic in a spherical tokamak. The IRVB was designed to study the radiation around the lower x-point, another first in tokamaks, and has the potential to estimate emissivity profiles with spatial resolution beyond what is achievable with resistive bolometry. The system was fully characterized prior to installation on MAST-U, and the results are summarized here. After installation, it was verified that the actual measurement geometry in the tokamak qualitatively matches the design; this is a particularly difficult process for bolometers and was done using specific features of the plasma itself. The installed IRVB measurements are consistent both with observations from other diagnostics, including magnetic reconstruction, visible light cameras, and resistive bolometry, as well as with the IRVB-designed view. Early results show that with conventional divertor geometry and only intrinsic impurities (for example, C and He), the progression of radiative detachment follows a similar path to that observed for large aspect ratio tokamaks: The peak of the radiation moves along the separatrix from the targets to the x-point and high-field side midplane with a toroidally symmetric structure that can eventually lead to strong effects on the core plasma inside the separatrix.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: Engineering and Physical Sciences Research Council; European Union (EU); USDOE; USDOE Office of Science (SC)

Contributing Organization:: MAST Upgrade Team

Grant/Contract Number:: AC05-00OR22725; SC0014264

OSTI ID:: 1959615

Alternate ID(s):: OSTI ID: 1959276

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 94; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

References (37)

X-Ray Interactions: Photoabsorption, Scattering, Transmission, and Reflection at E = 50-30,000 eV, Z = 1-92 Henke, B. L.; Gullikson, E. M.; Davis, J. C. Atomic Data and Nuclear Data Tables, Vol. 54, Issue 2, p. 181-342 https://doi.org/10.1006/adnd.1993.1013	journal	July 1993
Tomographic reconstruction of two-dimensional radiated power distribution during impurity injection in KSTAR plasmas using an infrared imaging video bolometer Jang, Juhyeok; Choe, Wonho; Peterson, B. J. Current Applied Physics, Vol. 18, Issue 4 https://doi.org/10.1016/j.cap.2018.01.009	journal	April 2018
New bolometry cameras for the JET Enhanced Performance Phase McCormick, K.; Huber, A.; Ingesson, C. Fusion Engineering and Design, Vol. 74, Issue 1-4 https://doi.org/10.1016/j.fusengdes.2005.06.153	journal	November 2005
Upgraded bolometer system on JET for improved radiation measurements Huber, A.; McCormick, K.; Andrew, P. Fusion Engineering and Design, Vol. 82, Issue 5-14 https://doi.org/10.1016/j.fusengdes.2007.03.027	journal	October 2007
Automated in situ line of sight calibration of ASDEX Upgrade bolometers Penzel, F.; Meister, H.; Bernert, M. Fusion Engineering and Design, Vol. 89, Issue 9-10 https://doi.org/10.1016/j.fusengdes.2014.03.075	journal	October 2014
Observation of divertor and core radiation in JT-60U by means of bolometric imaging Peterson, B. J.; Konoshima, S.; Parchamy, H. Journal of Nuclear Materials, Vol. 363-365 https://doi.org/10.1016/j.jnucmat.2007.01.090	journal	June 2007
Consequences of a reduction of the upstream power SOL width in ITER Kukushkin, A. S.; Pacher, H. D.; Pacher, G. W. Journal of Nuclear Materials, Vol. 438 https://doi.org/10.1016/j.jnucmat.2013.01.027	journal	July 2013
Broadening of the power fall-off length in a high density, high confinement H-mode regime in ASDEX Upgrade Faitsch, M.; Eich, T.; Harrer, G. F. Nuclear Materials and Energy, Vol. 26 https://doi.org/10.1016/j.nme.2020.100890	journal	March 2021
Divertor heat flux challenge and mitigation in SPARC Kuang, A. Q.; Ballinger, S.; Brunner, D. Journal of Plasma Physics, Vol. 86, Issue 5 https://doi.org/10.1017/s0022377820001117	journal	September 2020
A low noise highly integrated bolometer array for absolute measurement of VUV and soft x radiation Mast, K. F.; Vallet, J. C.; Andelfinger, C. Review of Scientific Instruments, Vol. 62, Issue 3 https://doi.org/10.1063/1.1142078	journal	March 1991
Infrared imaging video bolometer Peterson, B. J. Review of Scientific Instruments, Vol. 71, Issue 10 https://doi.org/10.1063/1.1290044	journal	January 2000
In-plane thermal diffusivity evaluation by infrared thermography Cernuschi, F.; Russo, A.; Lorenzoni, L. Review of Scientific Instruments, Vol. 72, Issue 10 https://doi.org/10.1063/1.1400151	journal	October 2001
Minimum Fisher regularization of image reconstruction for infrared imaging bolometer on HL-2A Gao, J. M.; Liu, Y.; Li, W. Review of Scientific Instruments, Vol. 84, Issue 9 https://doi.org/10.1063/1.4820920	journal	September 2013
Calibration of a thin metal foil for infrared imaging video bolometer to estimate the spatial variation of thermal diffusivity using a photo-thermal technique Pandya, Shwetang N.; Peterson, Byron J.; Sano, Ryuichi Review of Scientific Instruments, Vol. 85, Issue 5 https://doi.org/10.1063/1.4873713	journal	May 2014
A reconsideration of the noise equivalent power and the data analysis procedure for the infrared imaging video bolometers Pandya, Shwetang N.; Peterson, Byron J.; Kobayashi, Masahiro Review of Scientific Instruments, Vol. 85, Issue 12 https://doi.org/10.1063/1.4902183	journal	December 2014
Design and characterization of a prototype divertor viewing infrared video bolometer for NSTX-U van Eden, G. G.; Reinke, M. L.; Peterson, B. J. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4955487	journal	July 2016
In situ calibration of the foil detector for an infrared imaging video bolometer using a carbon evaporation technique Mukai, K.; Peterson, B. J.; Takayama, S. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4961280	journal	August 2016
Signal to noise ratio of upgraded imaging bolometer for KSTAR Peterson, Byron J.; Oh, Seungtae; Seo, Dongcheol Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038935	journal	October 2018
Experimental tests of an infrared video bolometer on Alcator C-Mod Reinke, M. L.; Terry, J. L.; van Eden, G. G. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5047050	journal	October 2018
The role of particle sinks and sources in Alcator C-Mod detached divertor discharges Lipschultz, B.; Terry, J. L.; Boswell, C. Physics of Plasmas, Vol. 6, Issue 5 https://doi.org/10.1063/1.873448	journal	May 1999
Sensitivity improvement of infrared imaging video bolometer for divertor plasma measurement Mukai, K.; Peterson, B. J.; Ezumi, N. Review of Scientific Instruments, Vol. 92, Issue 6 https://doi.org/10.1063/5.0043664	journal	June 2021
Marfe: an edge plasma phenomenon Lipschultz, B.; LaBombard, B.; Marmar, E. S. Nuclear Fusion, Vol. 24, Issue 8 https://doi.org/10.1088/0029-5515/24/8/002	journal	August 1984
Reconstruction of current profile parameters and plasma shapes in tokamaks Lao, L. L.; St. John, H.; Stambaugh, R. D. Nuclear Fusion, Vol. 25, Issue 11 https://doi.org/10.1088/0029-5515/25/11/007	journal	November 1985
Chapter 4: Power and particle control Loarte, A.; Lipschultz, B.; Kukushkin, A. S. Nuclear Fusion, Vol. 47, Issue 6 https://doi.org/10.1088/0029-5515/47/6/s04	journal	June 2007
Divertor studies in nitrogen induced completely detached H-modes in full tungsten ASDEX Upgrade Reimold, F.; Wischmeier, M.; Bernert, M. Nuclear Fusion, Vol. 55, Issue 3 https://doi.org/10.1088/0029-5515/55/3/033004	journal	February 2015
Partial detachment of high power discharges in ASDEX Upgrade Kallenbach, A.; Bernert, M.; Beurskens, M. Nuclear Fusion, Vol. 55, Issue 5 https://doi.org/10.1088/0029-5515/55/5/053026	journal	April 2015
Density limits in toroidal plasmas Greenwald, Martin Plasma Physics and Controlled Fusion, Vol. 44, Issue 8 https://doi.org/10.1088/0741-3335/44/8/201	journal	July 2002
SOLPS analysis of the MAST-U divertor with the effect of heating power and pumping on the access to detachment in the Super-x configuration Havlíčková, E.; Harrison, J.; Lipschultz, B. Plasma Physics and Controlled Fusion, Vol. 57, Issue 11 https://doi.org/10.1088/0741-3335/57/11/115001	journal	August 2015
Scrape-off layer (SOL) power width scaling and correlation between SOL and pedestal gradients across L, I and H-mode plasmas at ASDEX Upgrade Silvagni, D.; Eich, T.; Faitsch, M. Plasma Physics and Controlled Fusion, Vol. 62, Issue 4 https://doi.org/10.1088/1361-6587/ab74e8	journal	February 2020
Quiescence near the X-point of MAST measured by high speed visible imaging Walkden, N. R.; Harrison, J.; Silburn, S. A. Nuclear Fusion, Vol. 57, Issue 12 https://doi.org/10.1088/1741-4326/aa8512	journal	September 2017
Plasma radiation studies in Magnum-PSI using resistive bolometry van Eden, G. G.; Reinke, M. L.; Brons, S. Nuclear Fusion, Vol. 58, Issue 10 https://doi.org/10.1088/1741-4326/aad0a9	journal	July 2018
X-point radiation, its control and an ELM suppressed radiating regime at the ASDEX Upgrade tokamak Bernert, M.; Janky, F.; Sieglin, B. Nuclear Fusion, Vol. 61, Issue 2 https://doi.org/10.1088/1741-4326/abc936	journal	December 2020
MAST Upgrade Divertor Facility: A Test Bed for Novel Divertor Solutions Morris, William; Harrison, J. R.; Kirk, A. IEEE Transactions on Plasma Science, Vol. 46, Issue 5 https://doi.org/10.1109/tps.2018.2815283	journal	May 2018
First Application of an InfraRed Imaging Video Bolometer to Heliotron J Plasma Miyashita, Akira; Mukai, Kiyofumi; Ohshima, Shinsuke Plasma and Fusion Research, Vol. 16, Issue 0 https://doi.org/10.1585/pfr.16.1202079	journal	June 2021
Upgrade of Imaging Bolometers on LHD Peterson, Byron J.; Drapiko, Evgeny A.; Seo, Dongcheol Plasma and Fusion Research, Vol. 5 https://doi.org/10.1585/pfr.5.s2095	journal	January 2010
Foil Calibration for IR Imaging Bolometer by Laser Irradiation Sano, Ryuichi; Peterson, Byron J.; Drapiko, Evgeny A. Plasma and Fusion Research, Vol. 7, Issue 0 https://doi.org/10.1585/pfr.7.2405039	journal	January 2012
Improvement on Infrared Imaging Video Bolometer by Laser Calibration Method Itomi, Muneji; Peterson, Byron J.; Yamauchi, Yuji Plasma and Fusion Research, Vol. 9, Issue 0 https://doi.org/10.1585/pfr.9.3406080	journal	January 2014

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Design and implementation of a prototype infrared video bolometer (IRVB) in MAST Upgrade

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