Experimental tests of an infrared video bolometer on Alcator C-Mod
- 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.
- Research Organization:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- AC05-00OR22725; FC02-99ER54512; SC0014264
- OSTI ID:
- 1484207
- Alternate ID(s):
- OSTI ID: 1477914
- Journal Information:
- Review of Scientific Instruments, Vol. 89, Issue 10; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Signal to noise ratio of upgraded imaging bolometer for KSTAR
|
journal | October 2018 |
Improvement of infrared imaging video bolometer for application to deuterium experiment on the large helical device
|
journal | October 2018 |
Similar Records
The dependence of divertor power sharing on magnetic flux balance in near double-null configurations on Alcator C-Mod
The dependence of divertor power sharing on magnetic flux balance in near double-null configurations on Alcator C-Mod