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

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.
Authors:
 [1] ;  [1] ;  [1] ; ORCiD logo [1] ; ORCiD logo [2] ;  [1] ;  [3] ;  [3] ;  [1]
  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)
Publication Date:
Grant/Contract Number:
AC02-09CH11466
Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 11; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Research Org:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1372462

Scott, E. R., Barchfeld, R., Riemenschneider, P., Domier, C. W., Muscatello, C. M., Sohrabi, M., Kaita, R., Ren, Y., and Luhmann, Jr., N. C.. Far-infrared tangential interferometer/polarimeter design and installation for NSTX-U. United States: N. p., Web. doi:10.1063/1.4960415.
Scott, E. R., Barchfeld, R., Riemenschneider, P., Domier, C. W., Muscatello, C. M., Sohrabi, M., Kaita, R., Ren, Y., & Luhmann, Jr., N. C.. Far-infrared tangential interferometer/polarimeter design and installation for NSTX-U. United States. doi:10.1063/1.4960415.
Scott, E. R., Barchfeld, R., Riemenschneider, P., Domier, C. W., Muscatello, C. M., Sohrabi, M., Kaita, R., Ren, Y., and Luhmann, Jr., N. C.. 2016. "Far-infrared tangential interferometer/polarimeter design and installation for NSTX-U". United States. doi:10.1063/1.4960415. https://www.osti.gov/servlets/purl/1372462.
@article{osti_1372462,
title = {Far-infrared tangential interferometer/polarimeter design and installation for NSTX-U},
author = {Scott, E. R. and Barchfeld, R. and Riemenschneider, P. and Domier, C. W. and Muscatello, C. M. and Sohrabi, M. and Kaita, R. and Ren, Y. and Luhmann, Jr., N. C.},
abstractNote = {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.},
doi = {10.1063/1.4960415},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = {2016},
month = {8}
}