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

Dataset · Tue Nov 01 00:00:00 EDT 2016

DOI:https://doi.org/10.11578/1367157· OSTI ID:1367157

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

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1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

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: Portsmouth Gaseous Diffusion Plant, Piketon, OH (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Fusion Energy Sciences (FES)
• DOE Contract Number: AC02-09CH11466
• OSTI ID: 1367157
• Resource Relation: Related Information: Review of Scientific Instruments, Vol. 87, p. 11E114 (November 2016)
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
NSTX-U Density Interferometry FIReTIP