High resolution main-ion charge exchange spectroscopy in the DIII-D H-mode pedestal

Grierson, B. A.; Burrell, K. H.; Chrystal, C.; Groebner, R. J.; Haskey, S. R.; Kaplan, D. H.

doi:10.1063/1.4960604

High resolution main-ion charge exchange spectroscopy in the DIII-D H-mode pedestal

Journal Article · Mon Sep 12 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4960604· OSTI ID:1340075

^[1]; ^[2]; ^[3]; Groebner, R. J. ^[2]; ^[1]; Kaplan, D. H. ^[2]

Princeton Univ., Princeton, NJ (United States)
General Atomics, San Diego, CA (United States)
Oak Ridge Associated Universities, Oak Ridge, TN (United States)

A new high spatial resolution main-ion (deuterium) charge-exchange spectroscopy system covering the tokamak boundary region has been installed on the DIII-D tokamak. Sixteen new edge main-ion charge-exchange recombination sightlines have been combined with nineteen impurity sightlines in a tangentially viewing geometry on the DIII-D midplane with an interleaving design that achieves 8 mm inter-channel radial resolution for detailed profiles of main-ion temperature, velocity, charge-exchange emission, and neutral beam emission. At the plasma boundary, we find a strong enhancement of the main-ion toroidal velocity that exceeds the impurity velocity by a factor of two. Furthermore, the unique combination of experimentally measured main-ion and impurity profiles provides a powerful quasi-neutrality constraint for reconstruction of tokamak H-mode pedestals.

View Accepted Manuscript (DOE)

Research Organization:: General Atomics, San Diego, CA (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Contributing Organization:: Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831, USA; B.A. Grierson, K.H. Burrell, C. Chrystal, R.J. Groebner, S.R. Haskey, D.H. Kaplan, "High resolution main-ion charge exchange spectroscopy in the DIII-D H-mode pedestal", Rev. Sci. Instrum. 87, 11E545 (2016); General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA

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

OSTI ID:: 1340075

Alternate ID(s):: OSTI ID: 1371902

Report Number(s):: 5275

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 11 Vol. 87; ISSN 0034-6748; ISSN RSINAK

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

Country of Publication:: United States

Language:: English

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Cited By (5)

Validation of the kinetic-turbulent-neoclassical theory for edge intrinsic rotation in DIII-D Ashourvan, Arash; Grierson, B. A.; Battaglia, D. J. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5018326	journal	May 2018
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. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038349	journal	October 2018
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
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
Simulation of neutron emission in neutral beam injection heated plasmas with the real-time code RABBIT Weiland, M.; Bilato, R.; Collins, C. S. Nuclear Fusion, Vol. 59, Issue 8 https://doi.org/10.1088/1741-4326/ab1edd	journal	June 2019

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