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Title: Initial operation and data processing on a system for real-time evaluation of Thomson scattering signals on the Large Helical Device
Contributors: 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.
US Department of Energy contract number DE-AC02-09CH11466
US Department of Energy contract number DE-SC0015480
NIFS LHD Project grant number ULHH040
Keywords: Thomson scattering, real-time, LHD, plasma diagnostic
Issue Date: 2021
Publisher: Princeton Plasma Physics Laboratory, Princeton University
Abstract: 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 (LHD) 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.
Appears in Collections:Stellarators

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