Spatial heterodyne spectroscopy for high speed measurements of Stark split neutral beam emission in a high temperature plasma

Burke, Marcus G.; Fonck, Raymond J.; McKee, George R.; Winz, Gregory R.

doi:10.1063/1.5039285

Title: Spatial heterodyne spectroscopy for high speed measurements of Stark split neutral beam emission in a high temperature plasma

Journal Article · Tue Aug 28 00:00:00 EDT 2018 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.5039285· OSTI ID:1515855

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Univ. of Wisconsin, Madison, WI (United States). Dept. of Engineering Physics

Measurement of electrostatic potential, or local electric field, turbulence is a critical missing component in validating nonlinear turbulence and transport simulations of fusion plasmas. A novel diagnostic is being developed for measuring local electric field fluctuations, $$\sim\atop{E}$$(r,t), via high-speed measurements of the light emitted from a hydrogenic neutral beam. It exploits the proportionality of the spectral line splitting from the Motional Stark Effect to the total electric field experienced by the neutral atom at the excitation site. The measurement is localized by the usual cross-beam geometry of beam-spectroscopy measurements. The corner stone of the diagnostic is a high spectral resolution, high etendue spatial heterodyne spectrometer (SHS). A SHS design with high etendue (~5 mm² sr) and resolution (~0.14 nm) meets the formidable spectrometer requirements. Field tests of the spectrometer at the DIII-D tokamak demonstrate that the beam emission spectrum produced by the SHS agrees with that of a traditional spectrometer and that the measured flux is adequate for turbulence studies.

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Research Organization:: Univ. of Wisconsin-Madison, Stoughton, WI (United States). Synchrotron Radiation Center (SRC)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FG02-89ER53296; FC02-04ER54698

OSTI ID:: 1515855

Alternate ID(s):: OSTI ID: 1467140

Journal Information:: Review of Scientific Instruments, Vol. 89, Issue 10; Related Information: Public Data Set: Spatial Heterodyne Spectroscopy for High Speed Measurements of Stark Split Neutral Beam Emission in a High Temperature Plasma, DOI: 10.18138/1435641; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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References (13)

Public Data Set: Spatial Heterodyne Spectroscopy for High Speed Measurements of Stark Split Neutral Beam Emission in a High Temperature Plasma Burke, Marcus; Fonck, Raymond; McKee, George University of Wisconsin-Madison https://doi.org/10.18138/1435641	dataset	January 2018
The beam emission spectroscopy diagnostic on the DIII-D tokamak McKee, G.; Ashley, R.; Durst, R. Review of Scientific Instruments, Vol. 70, Issue 1 https://doi.org/10.1063/1.1149416	journal	January 1999
High-resolution fast-beam spectroscopy using an off-axis Fabry-Perot interferometer Roesler, F. L.; Stoner, John O. Nuclear Instruments and Methods, Vol. 110 https://doi.org/10.1016/0029-554x(73)90728-3	journal	July 1973
Plasma fluctuation measurements in tokamaks using beam‐plasma interactions Fonck, R. J.; Duperrex, P. A.; Paul, S. F. Review of Scientific Instruments, Vol. 61, Issue 11 https://doi.org/10.1063/1.1141556	journal	November 1990
Density fluctuation measurements via beam emission spectroscopy (invited) Durst, R. D.; Fonck, R. J.; Cosby, G. Review of Scientific Instruments, Vol. 63, Issue 10 https://doi.org/10.1063/1.1143546	journal	October 1992
Measurements of ion temperature fluctuations in the Tokamak Fusion Test Reactor Evensen, H. T.; Fonck, R. J.; Paul, S. F. Nuclear Fusion, Vol. 38, Issue 2 https://doi.org/10.1088/0029-5515/38/2/307	journal	February 1998
Fluctuation-Induced Energy Flux in the Tokamak Edge Ritz, Ch. P.; Bravenec, R. V.; Schoch, P. M. Physical Review Letters, Vol. 62, Issue 16 https://doi.org/10.1103/physrevlett.62.1844	journal	April 1989
Spatial heterodyne spectroscopy for the exploration of diffuse interstellar emission lines at far-ultraviolet wavelengths Harlander, J.; Reynolds, R. J.; Roesler, F. L. The Astrophysical Journal, Vol. 396 https://doi.org/10.1086/171756	journal	September 1992
Space Potential Distribution in the ISX-B Tokamak Hallock, G. A.; Mathew, J.; Jennings, W. C. Physical Review Letters, Vol. 56, Issue 12 https://doi.org/10.1103/physrevlett.56.1248	journal	March 1986
Spatial heterodyne spectroscopy at the Naval Research Laboratory Englert, Christoph R.; Harlander, John M.; Brown, Charles M. Applied Optics, Vol. 54, Issue 31 https://doi.org/10.1364/ao.54.00f158	journal	January 2015
Ultrafast ion temperature and toroidal velocity fluctuation spectroscopy diagnostic design McKee, G. R.; Schlossberg, D. J.; Shafer, M. W. Review of Scientific Instruments, Vol. 79, Issue 10 https://doi.org/10.1063/1.2974808	journal	October 2008
Fabry-Perot Spectrometer Adjustment for the Compensation of Doppler Shift from Rapidly Rotating and Rapidly Flowing Sources Trauger, J. T.; Roesler, F. L. Applied Optics, Vol. 11, Issue 9 https://doi.org/10.1364/ao.11.001964	journal	January 1972
Fluctuation-Induced Energy Flux in the Tokamak Edge Ritz, Ch. P.; Bravenec, R. V.; Schoch, P. M. Physical Review Letters, Vol. 62, Issue 26 https://doi.org/10.1103/physrevlett.62.3099	journal	June 1989

Cited By (1)

Public Data Set: Spatial Heterodyne Spectroscopy for High Speed Measurements of Stark Split Neutral Beam Emission in a High Temperature Plasma Burke, Marcus; Fonck, Raymond; McKee, George University of Wisconsin-Madison https://doi.org/10.18138/1435641	dataset	January 2018