Far-infrared tangential interferometer/polarimeter design and installation for NSTX-U

Journal Article · Tue Aug 09 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4960415· OSTI ID:1372462

Scott, E. R. ^[1]; Barchfeld, R. ^[1]; Riemenschneider, P. ^[1]; Domier, C. W.  ^[1]; Muscatello, C. M.  ^[2]; Sohrabi, M. ^[1]; Kaita, R. ^[3]; Ren, Y. ^[3]; Luhmann, Jr., N. C. ^[1]

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1. Univ. of California, Davis, CA (United States)
2. General Atomics, San Diego, CA (United States)
3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Here, the Far-infrared Tangential Interferometer/Polarimeter (FIReTIP) system has been refurbished and is being reinstalled on the National Spherical Torus Experiment—Upgrade (NSTX-U) to supply real-time line-integrated core electron density measurements for use in the NSTX-U plasma control system (PCS) to facilitate real-time density feedback control of the NSTX-U plasma. Inclusion of a visible light heterodyne interferometer in the FIReTIP system allows for real-time vibration compensation due to movement of an internally mounted retroreflector and the FIReTIP front-end optics. Real-time signal correction is achieved through use of a National Instruments CompactRIO field-programmable gate array.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-09CH11466
• OSTI ID: 1372462
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 11; ISSN 0034-6748
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY