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

Advanced Tokamak Physics

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

8 Scopus citations

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

Funding

This work was carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Program (Grant Agreement No. 101052200—EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. This work was supported, in part, by the Swiss National Science Foundation.

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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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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

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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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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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