Measurement of the passive fast-ion D-alpha emission on the NSTX-U tokamak

Hao, G. Z.; Heidbrink, W. W.; Liu, D.; Podesta, M.; Stagner, L.; Bell, R. E.; Bortolon, A.; Scotti, F.

doi:10.1088/1361-6587/aa9fde

Title: Measurement of the passive fast-ion D-alpha emission on the NSTX-U tokamak

Journal Article · Mon Jan 08 00:00:00 EST 2018 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/1361-6587/aa9fde· OSTI ID:1432936

^[1]; Heidbrink, W. W. ^[1];

^[1];

^[2]; Stagner, L. ^[1]; Bell, R. E. ^[2];

^[2]; Scotti, F. ^[3]

Univ. of California, Irvine, CA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

On National Spherical Torus Experiment Upgrade, the passive fast-ion D-alpha (passive-FIDA) spectra from charge exchange (CX) between the beam ions and the background neutrals are measured and simulated. The results indicate that the passive-FIDA signal is measurable and comparable to the active-FIDA on several channels, such as at the major radius R = 117 cm. For this, active-FIDA means the active D-alpha emission from the fast ions that CX with the injected neutrals. The shapes of measured spectra are in agreement with FIDASIM simulations on many fibers. Furthermore, the passive-FIDA spatial profile agrees with the simulation. When making measurements of active-FIDA in the edge region using time-slice subtraction, variations in the passive-FIDA contribution to the signal should be considered.

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Research Organization:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC02-09CH11466; FG02-06ER54867; FG03-02ER54681; AC52-07NA27344

OSTI ID:: 1432936

Alternate ID(s):: OSTI ID: 1870567

Report Number(s):: LLNL-JRNL-834550; TRN: US1802800

Journal Information:: Plasma Physics and Controlled Fusion, Vol. 60, Issue 2; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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