The charge exchange recombination spectroscopy diagnostic on the upgraded Lithium Tokamak eXperiment (LTX-β)

Elliott, Drew; Biewer, Theodore; Boyle, D; Kaita, R.; Majeski, R

doi:10.1063/1.5039368

Title: The charge exchange recombination spectroscopy diagnostic on the upgraded Lithium Tokamak eXperiment (LTX-β)

Conference · Mon Oct 01 00:00:00 EDT 2018

DOI:https://doi.org/10.1063/1.5039368· OSTI ID:1559732

^[1];

^[1]; Boyle, D ^[2]; Kaita, R. ^[2]; Majeski, R ^[2]

ORNL
Princeton Plasma Physics Laboratory (PPPL)

The Lithium Tokamak eXperiment has undergone an upgrade to LTX-β, a major part of which is the addition of neutral beam injection (NBI). NBI has allowed for a new charge exchange recombination spectroscopy (CHERS) system to be installed in order to measure impurity concentrations, ion temperature, and toroidal velocity. Previously on LTX measuring these parameters relied on passive spectroscopy and inversion techniques and had large uncertainty. The CHERS system has 52 total views, split into four groups of 13, half facing toward the beam and half symmetrically facing away from the beam, so the background non-beam related emission can be simultaneously subtracted. Both sets of views sample a major radius of 27-59 cm, with resolution through the beam of 1.5-2.5 cm. LTX-β is expected to have its magnetic axis near 35 cm, with minor radii of 18-23 cm. Three separate spectrometers will be used for the diagnostic, giving the system great flexibility to simultaneously measure emission from multiple impurity lines. The viewing optics are f/1.8, allowing all of the spectrometers to be fully illuminated. Design and calibration of the system as well as the advantages of various configurations of the spectrometers will be highlighted.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 1559732

Resource Relation:: Journal Volume: 89; Journal Issue: 10; Conference: High-Temperature Plasma Diagnostics (HTPD 2018) - San Diego, California, United States of America - 4/15/2018 8:00:00 AM-4/19/2018 8:00:00 AM

Country of Publication:: United States

Language:: English

References (18)

Measurement of poloidal velocity on the National Spherical Torus Experiment (invited) Bell, Ronald E.; Feder, Russell Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3485027	journal	October 2010
ELM elimination with Li powder injection in EAST discharges using the tungsten upper divertor Maingi, R.; Hu, J. S.; Sun, Z. Nuclear Fusion, Vol. 58, Issue 2 https://doi.org/10.1088/1741-4326/aa9e3f	journal	January 2018
Isothermal tokamak Catto, Peter J.; Hazeltine, R. D. Physics of Plasmas, Vol. 13, Issue 12 https://doi.org/10.1063/1.2403090	journal	December 2006
Comparison of poloidal velocity measurements to neoclassical theory on the National Spherical Torus Experiment Bell, R. E.; Andre, R.; Kaye, S. M. Physics of Plasmas, Vol. 17, Issue 8 https://doi.org/10.1063/1.3478571	journal	August 2010
The effect of lithium surface coatings on plasma performance in the National Spherical Torus Experiment Kugel, H. W.; Bell, M. G.; Ahn, J. -W. Physics of Plasmas, Vol. 15, Issue 5 https://doi.org/10.1063/1.2906260	journal	May 2008
Plasma ion temperature measurements via charge exchange recombination radiation Fonck, R. J.; Goldston, R. J.; Kaita, R. Applied Physics Letters, Vol. 42, Issue 3 https://doi.org/10.1063/1.93893	journal	February 1983
High accuracy wavelength calibration for a scanning visible spectrometer Scotti, Filippo; Bell, Ronald E. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3489975	journal	October 2010
The role of the neutral beam fueling profile in the performance of the Tokamak Fusion Test Reactor and other tokamak plasmas Park, H. K.; Sabbagh, S. A.; Batha, S. Physics of Plasmas, Vol. 4, Issue 5 https://doi.org/10.1063/1.872272	journal	May 1997
Transfer rates of toroidal angular momentum during neutral beam injection Zastrow, K. -D; Core, W. G. F.; Eriksson, L. -G Nuclear Fusion, Vol. 38, Issue 2 https://doi.org/10.1088/0029-5515/38/2/309	journal	February 1998
On lithium walls and the performance of magnetic fusion devices Krasheninnikov, S. I.; Zakharov, L. E.; Pereverzev, G. V. Physics of Plasmas, Vol. 10, Issue 5 https://doi.org/10.1063/1.1558293	journal	May 2003
Spectral emission measurements of lithium on the lithium tokamak experiment Gray, T. K.; Biewer, T. M.; Boyle, D. P. Review of Scientific Instruments, Vol. 83, Issue 10 https://doi.org/10.1063/1.4746812	journal	October 2012
Recent progress on divertor operations in EAST Guo, H. Y.; Gao, X.; Li, J. Journal of Nuclear Materials, Vol. 415, Issue 1 https://doi.org/10.1016/j.jnucmat.2010.11.048	journal	August 2011
A real-time velocity diagnostic for NSTX Podestà, M.; Bell, R. E. Review of Scientific Instruments, Vol. 83, Issue 3 https://doi.org/10.1063/1.3692752	journal	March 2012
Measurements of core lithium concentration in a Li-conditioned tokamak with carbon walls Podestà, M.; Bell, R. E.; Diallo, A. Nuclear Fusion, Vol. 52, Issue 3 https://doi.org/10.1088/0029-5515/52/3/033008	journal	March 2012
Core transport of lithium and carbon in ELM-free discharges with lithium wall conditioning in NSTX Scotti, F.; Soukhanovskii, V. A.; Bell, R. E. Nuclear Fusion, Vol. 53, Issue 8 https://doi.org/10.1088/0029-5515/53/8/083001	journal	July 2013
Effect of progressively increasing lithium conditioning on edge transport and stability in high triangularity NSTX H-modes Maingi, R.; Canik, J. M.; Bell, R. E. Fusion Engineering and Design, Vol. 117 https://doi.org/10.1016/j.fusengdes.2016.06.058	journal	April 2017
High performance discharges in the Lithium Tokamak eXperiment with liquid lithium wallsa) Schmitt, J. C.; Bell, R. E.; Boyle, D. P. Physics of Plasmas, Vol. 22, Issue 5 https://doi.org/10.1063/1.4921153	journal	May 2015
Lithium coatings on NSTX plasma facing components and its effects on boundary control, core plasma performance, and operation Kugel, H. W.; Bell, M. G.; Schneider, H. Fusion Engineering and Design, Vol. 85, Issue 6 https://doi.org/10.1016/j.fusengdes.2010.04.004	journal	November 2010

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