Implementation of high-resolution spectroscopy for ion (and electron) temperature measurements of the divertor plasma in the Tokamak à configuration variable

TitleImplementation of high-resolution spectroscopy for ion (and electron) temperature measurements of the divertor plasma in the Tokamak à configuration variable
Publication TypeJournal Article
Year of Publication2022
AuthorsL. Martinelli, D. Mikitchuck, B.P. Duval, Y. Andrebe, P. Blanchard, O. Fevrier, S. Gorno, H. Elaian, B. Linehan, A. Perek, C. Stollberg, B. Vincent, TCV team
JournalReview of Scientific Instruments
Volume93
Issue12
Pagination123505
Abstract

High resolution spectroscopy on the Tokamak à Configuration Variable (TCV) divertor plasma provided Doppler broadening measurements to infer the ion and neutral temperature of injected helium gas. This paper presents the Divertor Spectroscopy System’s (DSS) access to He II ion temperature measurements over a broad range, ≈0.5–15 eV, with an uncertainty of <10% for most of the studied plasma discharges. TCV’s shaping flexibility was employed to validate these measurements against Thomson scattering across the DSS lines of sight. In detachment-related experiments, T i(He II) ≃ T e, making this diagnostic a reliable thermometer along the divertor leg plasma over the wide range of magnetic equilibria and divertor configurations achievable in TCV. A detailed description of the diagnostic hardware, data analysis, and sources of uncertainty is presented.

DOI10.1063/5.0114538
Division

FP

Department

PEPD

PID1e7cd02ca3208cdcf7b633b7dcee7f03
Alternate TitleRev. Sci. Instrum.
LabelOA

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