Aligning the Thomson scattering and charge exchange recombination diagnostics using neutral beam emission at DIII-D

Feyrer, Abby; Haskey, Shaun R.; Chrystal, Colin; Aidala, Christine A.

doi:10.1063/5.0189566

Title: Aligning the Thomson scattering and charge exchange recombination diagnostics using neutral beam emission at DIII-D

Journal Article · 16 April 2024 · Review of Scientific Instruments

DOI: https://doi.org/10.1063/5.0189566 · OSTI ID:2346216

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Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center; General Atomics
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
General Atomics, San Diego, CA (United States)
Univ. of Michigan, Ann Arbor, MI (United States)

This work addresses discrepancies in the alignment of the H-mode pedestal profiles of the electron and ion properties in the DIII-D tokamak as measured by Thomson Scattering (TS) and Charge Exchange Recombination Spectroscopy (CER) diagnostics. While the alignment of these profiles is key for accurate studies of tokamak physics and plasma confinement, misalignments can occur due to inaccuracies, such as in magnetic equilibrium reconstructions required to map measurements in different poloidal and toroidal locations. Both FIDASIM, an established simulation package, and a simplified collisional radiative model are used to simulate neutral beam state densities and neutral beam emission. Simulated neutral beam emissions are calculated based on shifted TS profiles and compared to beam emission measurements from the Main Ion CER system to determine the best shift for aligning TS with CER. This analysis is performed on various DIII-D discharges.

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Research Organization:: General Atomics, San Diego, CA (United States)

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

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

OSTI ID:: 2346216

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 4 Vol. 95; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

References (18)

Elements of H-mode pedestal structure Groebner, R. J.; Saarelma, S. Plasma Physics and Controlled Fusion, Vol. 65, Issue 7 https://doi.org/10.1088/1361-6587/acd478	journal	May 2023
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
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
Identifying the location of the OMP separatrix in DIII-D using power accounting Stangeby, P. C.; Canik, J. M.; Elder, J. D. Nuclear Fusion, Vol. 55, Issue 9 https://doi.org/10.1088/0029-5515/55/9/093014	journal	August 2015
SciPy 1.0: fundamental algorithms for scientific computing in Python Virtanen, Pauli; Gommers, Ralf; Oliphant, Travis E. Nature Methods https://doi.org/10.1038/s41592-019-0686-2	journal	February 2020
Design and operation of the multipulse Thomson scattering diagnostic on DIII‐D (invited) Carlstrom, T. N.; Campbell, G. L.; DeBoo, J. C. Review of Scientific Instruments, Vol. 63, Issue 10 https://doi.org/10.1063/1.1143545	journal	October 1992
Progress in modelling fast-ion D-alpha spectra and neutral particle analyzer fluxes using FIDASIM Geiger, B.; Stagner, L.; Heidbrink, W. W. Plasma Physics and Controlled Fusion, Vol. 62, Issue 10 https://doi.org/10.1088/1361-6587/aba8d7	journal	August 2020
Reconstruction of current profile parameters and plasma shapes in tokamaks Lao, L. L.; St. John, H.; Stambaugh, R. D. Nuclear Fusion, Vol. 25, Issue 11 https://doi.org/10.1088/0029-5515/25/11/007	journal	November 1985
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
The EPED pedestal model and edge localized mode-suppressed regimes: Studies of quiescent H-mode and development of a model for edge localized mode suppression via resonant magnetic perturbations Snyder, P. B.; Osborne, T. H.; Burrell, K. H. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.3699623	journal	May 2012
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
A design retrospective of the DIII-D tokamak Luxon, J. L. Nuclear Fusion, Vol. 42, Issue 5 https://doi.org/10.1088/0029-5515/42/5/313	journal	May 2002
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
A review of ELMs in divertor tokamaks Hill, D. N. Journal of Nuclear Materials, Vol. 241-243 https://doi.org/10.1016/s0022-3115(97)80039-6	journal	February 1997
Excited-state populations in neutral beam emission Hutchinson, I. H. Plasma Physics and Controlled Fusion, Vol. 44, Issue 1 https://doi.org/10.1088/0741-3335/44/1/307	journal	December 2001
Anomalies in the applied magnetic fields in DIII-D and their implications for the understanding of stability experiments Luxon, J. L.; Schaffer, M. J.; Jackson, G. L. Nuclear Fusion, Vol. 43, Issue 12 https://doi.org/10.1088/0029-5515/43/12/024	journal	December 2003
Compatibility of separatrix density scaling for divertor detachment with H-mode pedestal operation in DIII-D Leonard, A. W.; McLean, A. G.; Makowski, M. A. Nuclear Fusion, Vol. 57, Issue 8 https://doi.org/10.1088/1741-4326/aa778c	journal	July 2017
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

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