Initial operation and data processing on a system for real-time evaluation of Thomson scattering signals on the Large Helical Device

Hammond, K. C.; Laggner, F. M.; Diallo, A.; Doskoczynski, S.; Freeman, C.; Funaba, H.; Gates, D. A.; Rozenblat, R.; Tchilinguirian, G.; Xing, Z.; Yamada, I.; Yasuhara, R.; Zimmer, G.; Kolemen, E.

doi:10.1063/5.0041507

Title: Initial operation and data processing on a system for real-time evaluation of Thomson scattering signals on the Large Helical Device

Journal Article · Wed Jun 23 00:00:00 EDT 2021 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0041507· OSTI ID:1822271

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Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
National Institute for Fusion Science, Toki (Japan)
Princeton Univ., NJ (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States)

A scalable system for real-time analysis of electron temperature and density based on signals from the Thomson scattering diagnostic, initially developed for and installed on the NSTX-U experiment, was recently adapted for the Large Helical Device and operated for the first time during plasma discharges. During its initial operation run, it routinely recorded and processed signals for four spatial points at the laser repetition rate of 30 Hz, well within the system’s rated capability for 60 Hz. We present examples of data collected from this initial run and describe subsequent adaptations to the analysis code to improve the fidelity of the temperature calculations.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE; National Institute for Fusion Science (NIFS)

Grant/Contract Number:: AC02-09CH11466; SC0015480

OSTI ID:: 1822271

Alternate ID(s):: OSTI ID: 1798220

Journal Information:: Review of Scientific Instruments, Vol. 92, Issue 6; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

References (17)

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