Far-infrared tangential interferometer/polarimeter design and installation for NSTX-U
- Princeton Plasma Physics Laboratory
- 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 Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
- DOE Contract Number:
- AC02-09CH11466
- OSTI ID:
- 1367157
- Country of Publication:
- United States
- Language:
- English
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Far-infrared tangential interferometer/polarimeter design and installation for NSTX-U
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