Preliminary design of a tangentially viewing imaging bolometer for NSTX-U
- National Institute for Fusion Science, Toki 509-5292 (Japan)
- The Graduate University for Advance Studies; Japan
- National Institutes for Quantum and Radiological Science and Technology, Naka, Ibaraki 311-0193 (Japan)
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
- FOM Institute DIFFER, 5612 AJ Eindhoven (Netherlands)
The infrared imaging video bolometer (IRVB) measures plasma radiated power images using a thin metal foil. Two different designs with a tangential view of NSTX-U are made assuming a 640 × 480 (1280 × 1024) pixel, 30 (105) fps, 50 (20) mK, IR camera imaging the 9 cm × 9 cm × 2 μm Pt foil. The foil is divided into 40 × 40 (64 × 64) IRVB channels. This gives a spatial resolution of 3.4 (2.2) cm on the machine mid-plane. The noise equivalent power density of the IRVB is given as 113 (46) μW/cm{sup 2} for a time resolution of 33 (20) ms. Synthetic images derived from Scrape Off Layer Plasma Simulation data using the IRVB geometry show peak signal levels ranging from ∼0.8 to ∼80 (∼0.36 to ∼26) mW/cm{sup 2}.
- OSTI ID:
- 22596563
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 11 Vol. 87; ISSN 0034-6748; ISSN RSINAK
- Country of Publication:
- United States
- Language:
- English
Signal to noise ratio of upgraded imaging bolometer for KSTAR
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journal | October 2018 |
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