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

L. Martinelli; D. Mikitchuck; B. P. Duval; Y. Andrebe; P. Blanchard; O. Février; S. Gorno; H. Elaian; B. L. Linehan; A. Perek; C. Stollberg; B. Vincent

doi:10.1063/5.0114538

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

L. Martinelli, D. Mikitchuck, B. P. Duval, Y. Andrebe, P. Blanchard, O. Février, S. Gorno, H. Elaian, B. L. Linehan, A. Perek, C. Stollberg, B. Vincent

Research output: Contribution to journal › Article › peer-review

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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, Ti(He II) ≃ Te, 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.

Original language	English
Article number	123505
Journal	Review of Scientific Instruments
Volume	93
Issue number	12
DOIs	https://doi.org/10.1063/5.0114538
State	Published - Dec 1 2022
Externally published	Yes

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Martinelli, L., Mikitchuck, D., Duval, B. P., Andrebe, Y., Blanchard, P., Février, O., Gorno, S., Elaian, H., Linehan, B. L., Perek, A., Stollberg, C., & Vincent, B. (2022). Implementation of high-resolution spectroscopy for ion (and electron) temperature measurements of the divertor plasma in the Tokamak à configuration variable. Review of Scientific Instruments, 93(12), Article 123505. https://doi.org/10.1063/5.0114538

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title = "Implementation of high-resolution spectroscopy for ion (and electron) temperature measurements of the divertor plasma in the Tokamak {\`a} configuration variable",

abstract = "High resolution spectroscopy on the Tokamak {\`a} 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, Ti(He II) ≃ Te, 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.",

author = "L. Martinelli and D. Mikitchuck and Duval, {B. P.} and Y. Andrebe and P. Blanchard and O. F{\'e}vrier and S. Gorno and H. Elaian and Linehan, {B. L.} and A. Perek and C. Stollberg and B. Vincent",

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doi = "10.1063/5.0114538",

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Martinelli, L, Mikitchuck, D, Duval, BP, Andrebe, Y, Blanchard, P, Février, O, Gorno, S, Elaian, H, Linehan, BL, Perek, A, Stollberg, C & Vincent, B 2022, 'Implementation of high-resolution spectroscopy for ion (and electron) temperature measurements of the divertor plasma in the Tokamak à configuration variable', Review of Scientific Instruments, vol. 93, no. 12, 123505. https://doi.org/10.1063/5.0114538

TY - JOUR

T1 - Implementation of high-resolution spectroscopy for ion (and electron) temperature measurements of the divertor plasma in the Tokamak à configuration variable

AU - Martinelli, L.

AU - Mikitchuck, D.

AU - Duval, B. P.

AU - Andrebe, Y.

AU - Blanchard, P.

AU - Février, O.

AU - Gorno, S.

AU - Elaian, H.

AU - Linehan, B. L.

AU - Perek, A.

AU - Stollberg, C.

AU - Vincent, B.

PY - 2022/12/1

Y1 - 2022/12/1

N2 - 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, Ti(He II) ≃ Te, 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.

AB - 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, Ti(He II) ≃ Te, 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.

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DO - 10.1063/5.0114538

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AN - SCOPUS:85144386228

SN - 0034-6748

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JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 12

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ER -

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

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