Active spectroscopy measurements of the deuterium temperature, rotation, and density from the core to scrape off layer on the DIII-D tokamak (invited)

Haskey, S. R.; Grierson, B. A.; Stagner, L.; Chrystal, C.; Ashourvan, A.; Bortolon, A.; Boyer, M. D.; Burrell, K. H.; Collins, C.; Groebner, R. J.; Kaplan, D. H.; Pablant, N. A.

doi:10.1063/1.5038349

Active spectroscopy measurements of the deuterium temperature, rotation, and density from the core to scrape off layer on the DIII-D tokamak (invited)

Journal Article · Thu Aug 16 00:00:00 EDT 2018 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.5038349· OSTI ID:1484226

^[1]; Grierson, B. A. ^[1]; ^[2]; ^[3]; Ashourvan, A. ^[1]; ^[1]; Boyer, M. D. ^[1]; ^[3]; Collins, C. ^[3]; Groebner, R. J. ^[3]; Kaplan, D. H. ^[3]; ^[1]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Univ. of California, Irvine, CA (United States)
General Atomics, San Diego, CA (United States)

Main-ion charge exchange recombination spectroscopy (MICER) uses the neutral beam induced D_α spectrum to measure the local deuterium ion (D⁺) temperature, rotation, and density, as well as parameters related to the neutral beams, fast ions, and magnetic field. An edge MICER system consisting of 16 densely packed chords was recently installed on DIII-D, extending the MICER technique from the core to the pedestal and steep gradient region of H-mode plasmas where the D⁺ and commonly measured impurity ion properties can differ significantly. A combination of iterative collisional radiative modeling techniques and greatly accelerated spectral fitting allowed the extension of this diagnostic technique to the plasma edge where the steep gradients introduce significant diagnostic challenges. The importance of including the fast ion Dα emission in the fit to the spectrum for the edge system is investigated showing that it is typically not important except for cases which can have significant fast ion fractions near the plasma edge such as QH-mode. Example profiles from an Ohmic L-mode and a high power ITER baseline case show large differences in the toroidal rotation of the two species near the separatrix including a strong co-current D⁺ edge rotation. As a result, the measurements and analysis demonstrate the state of the art in active spectroscopy and integrated modeling for diagnosing fusion plasmas and the importance of direct main ion measurements.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-09CH11466; FC02-04ER54698

OSTI ID:: 1484226

Alternate ID(s):: OSTI ID: 1464861

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 89; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

References (37)

An Empirical Approach to Tokamak Transport Hawryluk, R. J. Physics of Plasmas Close to Thermonuclear Conditions, p. 19-46 https://doi.org/10.1016/B978-1-4832-8385-2.50009-1	book	January 1979
The tokamak Monte Carlo fast ion module NUBEAM in the National Transport Code Collaboration library Pankin, Alexei; McCune, Douglas; Andre, Robert Computer Physics Communications, Vol. 159, Issue 3 https://doi.org/10.1016/j.cpc.2003.11.002	journal	June 2004
Toroidal rotation in DIII-D in electron cyclotron heating and Ohmic H-mode discharges deGrassie, J. S.; Burrell, K. H.; Baylor, L. R. Physics of Plasmas, Vol. 11, Issue 9 https://doi.org/10.1063/1.1778751	journal	September 2004
Measurement of the Dα spectrum produced by fast ions in DIII-D Luo, Y.; Heidbrink, W. W.; Burrell, K. H. Review of Scientific Instruments, Vol. 78, Issue 3 https://doi.org/10.1063/1.2712806	journal	March 2007
Fast-ion Dα measurements of the fast-ion distribution (invited) Heidbrink, W. W. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3478739	journal	October 2010
Measurements of the internal magnetic field using the B-Stark motional Stark effect diagnostic on DIII-D (invited) Pablant, N. A.; Burrell, K. H.; Groebner, R. J. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3491209	journal	October 2010
Measurements of the deuterium ion toroidal rotation in the DIII-D tokamak and comparison to neoclassical theory Grierson, B. A.; Burrell, K. H.; Heidbrink, W. W. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.3694656	journal	May 2012
Active spectroscopic measurements of the bulk deuterium properties in the DIII-D tokamak (invited) Grierson, B. A.; Burrell, K. H.; Chrystal, C. Review of Scientific Instruments, Vol. 83, Issue 10 https://doi.org/10.1063/1.4739239	journal	October 2012
Kinetic neoclassical transport in the H-mode pedestal Battaglia, D. J.; Burrell, K. H.; Chang, C. S. Physics of Plasmas, Vol. 21, Issue 7 https://doi.org/10.1063/1.4886803	journal	July 2014
Discovery of stationary operation of quiescent H-mode plasmas with net-zero neutral beam injection torque and high energy confinement on DIII-D Burrell, K. H.; Barada, K.; Chen, X. Physics of Plasmas, Vol. 23, Issue 5 https://doi.org/10.1063/1.4943521	journal	March 2016
Improved edge charge exchange recombination spectroscopy in DIII-D Chrystal, C.; Burrell, K. H.; Grierson, B. A. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4958915	journal	August 2016
High resolution main-ion charge exchange spectroscopy in the DIII-D H-mode pedestal Grierson, B. A.; Burrell, K. H.; Chrystal, C. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4960604	journal	September 2016
Experimental evidence of edge intrinsic momentum source driven by kinetic ion loss and edge radial electric fields in tokamaks Boedo, J. A.; deGrassie, J. S.; Grierson, B. Physics of Plasmas, Vol. 23, Issue 9 https://doi.org/10.1063/1.4962683	journal	September 2016
Measurement of deuterium density profiles in the H-mode steep gradient region using charge exchange recombination spectroscopy on DIII-D Haskey, S. R.; Grierson, B. A.; Burrell, K. H. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4963148	journal	September 2016
Effects of E×B velocity shear and magnetic shear on turbulence and transport in magnetic confinement devices Burrell, K. H. Physics of Plasmas, Vol. 4, Issue 5 https://doi.org/10.1063/1.872367	journal	May 1997
Notched velocity profiles and the radial electric field in high ion temperature plasmas in the Tokamak Fusion Test Reactor Ernst, D. R.; Bell, M. G.; Bell, R. E. Physics of Plasmas, Vol. 5, Issue 3 https://doi.org/10.1063/1.872771	journal	March 1998
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
Measurements of plasma ion temperature and rotation velocity using the He II 4686‐Å line produced by charge transfer Groebner, R. J.; Brooks, N. H.; Burrell, K. H. Applied Physics Letters, Vol. 43, Issue 10 https://doi.org/10.1063/1.94180	journal	November 1983
OMFIT Tokamak Profile Data Fitting and Physics Analysis Logan, N. C.; Grierson, B. A.; Haskey, S. R. Fusion Science and Technology, Vol. 74, Issue 1-2 https://doi.org/10.1080/15361055.2017.1386943	journal	January 2018
Orchestrating TRANSP Simulations for Interpretative and Predictive Tokamak Modeling with OMFIT Grierson, B. A.; Yuan, X.; Gorelenkova, M. Fusion Science and Technology, Vol. 74, Issue 1-2 https://doi.org/10.1080/15361055.2017.1398585	journal	February 2018
Local ion temperature measurements from Doppler broadening of hydrogen lines using a fast atomic beam Berezovskij, E. L.; Berezovskaya, M. M.; Izvozchikov, A. B. Nuclear Fusion, Vol. 25, Issue 10 https://doi.org/10.1088/0029-5515/25/10/014	journal	October 1985
Collisionality scaling of main-ion toroidal and poloidal rotation in low torque DIII-D plasmas Grierson, B. A.; Burrell, K. H.; Solomon, W. M. Nuclear Fusion, Vol. 53, Issue 6 https://doi.org/10.1088/0029-5515/53/6/063010	journal	May 2013
Collisionality dependence of edge rotation and in–out impurity asymmetries in ASDEX Upgrade H-mode plasmas Viezzer, E.; Fable, E.; Pütterich, T. Nuclear Fusion, Vol. 55, Issue 12 https://doi.org/10.1088/0029-5515/55/12/123002	journal	October 2015
Integrated modeling applications for tokamak experiments with OMFIT Meneghini, O.; Smith, S. P.; Lao, L. L. Nuclear Fusion, Vol. 55, Issue 8 https://doi.org/10.1088/0029-5515/55/8/083008	journal	July 2015
Control of power, torque, and instability drive using in-shot variable neutral beam energy in tokamaks Pace, D. C.; Collins, C. S.; Crowley, B. Nuclear Fusion, Vol. 57, Issue 1 https://doi.org/10.1088/0029-5515/57/1/014001	journal	September 2016
An overview of charge-exchange spectroscopy as a plasma diagnostic Isler, R. C. Plasma Physics and Controlled Fusion, Vol. 36, Issue 2 https://doi.org/10.1088/0741-3335/36/2/001	journal	February 1994
Measurement of deuterium ion temperature profiles at TEXTOR-94 Busche, E.; Euringer, H.; Jaspers, R. Plasma Physics and Controlled Fusion, Vol. 39, Issue 9 https://doi.org/10.1088/0741-3335/39/9/005	journal	September 1997
Improved kinetic neoclassical transport calculation for a low-collisionality QH-mode pedestal Battaglia, D. J.; Burrell, K. H.; Chang, C. S. Plasma Physics and Controlled Fusion, Vol. 58, Issue 8 https://doi.org/10.1088/0741-3335/58/8/085009	journal	July 2016
Main-ion temperature and plasma rotation measurements based on scattering of electron cyclotron heating waves in ASDEX Upgrade Stejner, M.; Rasmussen, J.; Nielsen, S. K. Plasma Physics and Controlled Fusion, Vol. 59, Issue 7 https://doi.org/10.1088/1361-6587/aa711a	journal	June 2017
Main ion and impurity edge profile evolution across the L- to H-mode transition on DIII-D Haskey, S. R.; Grierson, B. A.; Chrystal, C. Plasma Physics and Controlled Fusion, Vol. 60, Issue 10 https://doi.org/10.1088/1361-6587/aad702	journal	August 2018
Deuterium temperature, drift velocity, and density measurements in non-Maxwellian plasmas at ASDEX Upgrade Salewski, M.; Geiger, B.; Jacobsen, A. S. Nuclear Fusion, Vol. 58, Issue 3 https://doi.org/10.1088/1741-4326/aaa6e1	journal	February 2018
Deuterium charge exchange recombination spectroscopy from the top of the pedestal to the scrape off layer in H-mode plasmas Haskey, S. R.; Grierson, B. A.; Stagner, L. Journal of Instrumentation, Vol. 12, Issue 10 https://doi.org/10.1088/1748-0221/12/10/c10013	journal	October 2017
Evidence for Strong Inversed Shear of Toroidal Rotation at the Edge-Transport Barrier in the ASDEX Upgrade Pütterich, T.; Wolfrum, E.; Dux, R. Physical Review Letters, Vol. 102, Issue 2 https://doi.org/10.1103/physrevlett.102.025001	journal	January 2009
Main-Ion Intrinsic Toroidal Rotation Profile Driven by Residual Stress Torque from Ion Temperature Gradient Turbulence in the DIII-D Tokamak Grierson, B. A.; Wang, W. X.; Ethier, S. Physical Review Letters, Vol. 118, Issue 1 https://doi.org/10.1103/physrevlett.118.015002	journal	January 2017
Rotation characteristics of main ions and impurity ions in H -mode tokamak plasma Kim, J.; Burrell, K. H.; Gohil, P. Physical Review Letters, Vol. 72, Issue 14 https://doi.org/10.1103/physrevlett.72.2199	journal	April 1994
Charge-exchange recombination spectroscopy of the plasma ion temperature at the T-10 tokamak Krupin, V. A.; Tugarinov, S. N.; Barsukov, A. G. Plasma Physics Reports, Vol. 39, Issue 8 https://doi.org/10.1134/s1063780x13070040	journal	August 2013
A Code that Simulates Fast-Ion D _α and Neutral Particle Measurements Heidbrink, W. W.; Liu, D.; Luo, Y. Communications in Computational Physics, Vol. 10, Issue 3 https://doi.org/10.4208/cicp.190810.080211a	journal	September 2011

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Main-ion intrinsic toroidal rotation across the ITG/TEM boundary in DIII-D discharges during ohmic and electron cyclotron heating Grierson, B. A.; Chrystal, C.; Haskey, S. R. Physics of Plasmas, Vol. 26, Issue 4 https://doi.org/10.1063/1.5090505	journal	April 2019
Measurements of radial profile of hydrogen and deuterium density in isotope mixture plasmas using bulk charge exchange spectroscopy Ida, K.; Yoshinuma, M.; Yamasaki, K. Review of Scientific Instruments, Vol. 90, Issue 9 https://doi.org/10.1063/1.5097030	journal	September 2019
Main ion and impurity edge profile evolution across the L- to H-mode transition on DIII-D Haskey, S. R.; Grierson, B. A.; Chrystal, C. Plasma Physics and Controlled Fusion, Vol. 60, Issue 10 https://doi.org/10.1088/1361-6587/aad702	journal	August 2018
The isotope effect on impurities and bulk ion particle transport in the Large Helical Device Ida, K.; Sakamoto, R.; Yoshinuma, M. Nuclear Fusion, Vol. 59, Issue 5 https://doi.org/10.1088/1741-4326/ab0e41	journal	April 2019
Feedback control of stored energy and rotation with variable beam energy and perveance on DIII-D Boyer, M. D.; Erickson, K. G.; Grierson, B. A. Nuclear Fusion, Vol. 59, Issue 7 https://doi.org/10.1088/1741-4326/ab17f5	journal	May 2019
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Predicting the rotation profile in ITER Chrystal, C.; Grierson, B. A.; Haskey, S. R. Nuclear Fusion, Vol. 60, Issue 3 https://doi.org/10.1088/1741-4326/ab6434	journal	January 2020
Transition between Isotope-Mixing and Nonmixing States in Hydrogen-Deuterium Mixture Plasmas Ida, K.; Nakata, M.; Tanaka, K. Physical Review Letters, Vol. 124, Issue 2 https://doi.org/10.1103/physrevlett.124.025002	journal	January 2020
Direct Gyrokinetic Comparison of Pedestal Transport in JET with Carbon and ITER-Like Walls Hatch, D. R.; Kotschenreuther, M.; Mahajan, S. M. arXiv https://doi.org/10.48550/arxiv.1903.02627	text	January 2019

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