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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. Implementation of high-resolution spectroscopy for ion (and electron) temperature measurements of the divertor plasma in the Tokamak à configuration variable. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2022; 93:123505. [PMID: 36586937 DOI: 10.1063/5.0114538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/04/2022] [Indexed: 06/17/2023]
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.
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Affiliation(s)
- L Martinelli
- Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (SPC-EPFL), CH-1015 Lausanne, Switzerland
| | - D Mikitchuck
- Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (SPC-EPFL), CH-1015 Lausanne, Switzerland
| | - B P Duval
- Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (SPC-EPFL), CH-1015 Lausanne, Switzerland
| | - Y Andrebe
- Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (SPC-EPFL), CH-1015 Lausanne, Switzerland
| | - P Blanchard
- Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (SPC-EPFL), CH-1015 Lausanne, Switzerland
| | - O Février
- Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (SPC-EPFL), CH-1015 Lausanne, Switzerland
| | - S Gorno
- Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (SPC-EPFL), CH-1015 Lausanne, Switzerland
| | - H Elaian
- Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (SPC-EPFL), CH-1015 Lausanne, Switzerland
| | - B L Linehan
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, USA
| | - A Perek
- Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (SPC-EPFL), CH-1015 Lausanne, Switzerland
| | - C Stollberg
- Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (SPC-EPFL), CH-1015 Lausanne, Switzerland
| | - B Vincent
- Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (SPC-EPFL), CH-1015 Lausanne, Switzerland
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Predicted Behaviour of Helium in ITER by the Multi-Mode Transport Model. JOURNAL OF FUSION ENERGY 2022. [DOI: 10.1007/s10894-022-00317-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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