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Korsholm SB, Chambon A, Gonçalves B, Infante V, Jensen T, Jessen M, Klinkby EB, Larsen AW, Luis R, Nietiadi Y, Nonbøl E, Rasmussen J, Rechena D, Salewski M, Taormina A, Vale A, Varela P, Sanchez L, Ballester RM, Udintsev V, Liu Y. ITER collective Thomson scattering-Preparing to diagnose fusion-born alpha particles (invited). Rev Sci Instrum 2022; 93:103539. [PMID: 36319374 DOI: 10.1063/5.0101867] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
The ITER Collective Thomson scattering (CTS) diagnostic will measure the dynamics of fusion-born alpha particles in the burning ITER plasma by scattering a 1 MW 60 GHz gyrotron beam off fast-ion induced fluctuations in the plasma. The diagnostic will have seven measurement volumes across the ITER cross section and will resolve the alpha particle energies in the range from 300 keV to 3.5 MeV; importantly, the CTS diagnostic is the only diagnostic capable of measuring confined alpha particles for energies below ∼1.7 MeV and will also be sensitive to the other fast-ion populations. The temporal resolution is 100 ms, allowing the capture of dynamics on that timescale, and the typical spatial resolution is 10-50 cm. The development and design of the in-vessel and primary parts of the CTS diagnostic has been completed. This marks the beginning of a new phase of preparation to maximize the scientific benefit of the diagnostic, e.g., by investigating the capability to contribute to the determination of the fuel-ion ratio and the bulk ion temperature as well as integrating data analysis with other fast-ion and bulk-ion diagnostics.
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Affiliation(s)
- S B Korsholm
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - A Chambon
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - B Gonçalves
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Univ. Lisboa, 1049001 Lisbon, Portugal
| | - V Infante
- IDMEC, Instituto Superior Técnico, Univ. Lisboa, 1049001 Lisbon, Portugal
| | - T Jensen
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - M Jessen
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - E B Klinkby
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - A W Larsen
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - R Luis
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Univ. Lisboa, 1049001 Lisbon, Portugal
| | - Y Nietiadi
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Univ. Lisboa, 1049001 Lisbon, Portugal
| | - E Nonbøl
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - J Rasmussen
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - D Rechena
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Univ. Lisboa, 1049001 Lisbon, Portugal
| | - M Salewski
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - A Taormina
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - A Vale
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Univ. Lisboa, 1049001 Lisbon, Portugal
| | - P Varela
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Univ. Lisboa, 1049001 Lisbon, Portugal
| | - L Sanchez
- Fusion for Energy, 08019 Barcelona, Spain
| | | | - V Udintsev
- ITER Organization, 13115 Saint Paul Lez Durance, France
| | - Y Liu
- ITER Organization, 13115 Saint Paul Lez Durance, France
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Korsholm SB, Leipold F, Madsen RB, Gutierrez H, Jensen T, Jessen M, Larsen AW, Rasmussen J, Salewski M. Fast production of microwave component prototypes by additive manufacturing and copper coating. Rev Sci Instrum 2021; 92:033509. [PMID: 33820002 DOI: 10.1063/5.0043816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 02/18/2021] [Indexed: 06/12/2023]
Abstract
We present a novel method for efficient production of prototypes of microwave components by fused depositing modeling, also known as 3D plastic printing, and vapor deposition coating of a 1 μm copper layer. We demonstrate that the properties of the components follow the predicted performance for low power microwave propagation. The production method offers new opportunities for cheap and efficient production of mock-ups and prototypes of advanced-geometry components for tests with low-power microwaves.
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Affiliation(s)
- S B Korsholm
- Technical University of Denmark, Department of Physics, 2800 Kgs. Lyngby, Denmark
| | - F Leipold
- Technical University of Denmark, Department of Physics, 2800 Kgs. Lyngby, Denmark
| | | | - H Gutierrez
- Technical University of Denmark, Department of Physics, 2800 Kgs. Lyngby, Denmark
| | - T Jensen
- Technical University of Denmark, Department of Physics, 2800 Kgs. Lyngby, Denmark
| | - M Jessen
- Technical University of Denmark, Department of Physics, 2800 Kgs. Lyngby, Denmark
| | - A W Larsen
- Technical University of Denmark, Department of Physics, 2800 Kgs. Lyngby, Denmark
| | - J Rasmussen
- Technical University of Denmark, Department of Physics, 2800 Kgs. Lyngby, Denmark
| | - M Salewski
- Technical University of Denmark, Department of Physics, 2800 Kgs. Lyngby, Denmark
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Lopes A, Luís R, Klinkby E, Nietiadi Y, Chambon A, Nonbøl E, Gonçalves B, Jessen M, Korsholm S, Larsen A, Lauritzen B, Rasmussen J, Salewski M. Shielding analysis of the ITER Collective Thomson Scattering system. Fusion Engineering and Design 2020. [DOI: 10.1016/j.fusengdes.2020.111994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Korsholm SB, Gonçalves B, Gutierrez HE, Henriques E, Infante V, Jensen T, Jessen M, Klinkby EB, Larsen AW, Leipold F, Lopes A, Luis R, Naulin V, Nielsen SK, Nonbøl E, Rasmussen J, Salewski M, Stejner M, Taormina A, Vale A, Vidal C, Sanchez L, Ballester RM, Udintsev V. Design and development of the ITER CTS diagnostic. EPJ Web Conf 2019. [DOI: 10.1051/epjconf/201920303002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The Collective Thomson Scattering (CTS) diagnostic will be a primary diagnostic for measuring the dynamics of the confined fusion born alpha particles in ITER and will be the only diagnostic for alphas below 1.7 MeV [1]. The probe beam of the CTS diagnostic comes from a 60 GHz 1 MW gyrotron operated in a ~100 Hz modulation sequence. In the plasma, the probing beam will be scattered off fluctuations primarily due to the dynamics of the ions. Seven fixed receiver mirrors will pick up scattered radiation (the CTS signal) from seven measurement volumes along the probe beam covering the cross section of the plasma. The diagnostic is planned to provide a temporal resolution of ~100 ms and a spatial resolution of ~a/4 in the core and ~a/20 near the plasma edge where a = 2.0 m is the nominal minor radius of ITER. The front-end quasi-optics will be installed in an equatorial port plug (EPP#12). A particular challenge will be to pass the probing beam through the fundamental electron cyclotron resonance, which is located in the port plug (R=10.3 m) for the nominal magnetic field Bt = 5.3 T. Hence, particular mitigation actions against arcing have to be applied. The status of the design and specific challenges will be discussed.
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Vidal C, Luís R, Pereira B, Ferreira R, Gonçalves B, Korsholm S, Lopes A, Klinkby E, Nonbøl E, Jessen M, Salewski M, Rasmussen J, Lauritzen B, Larsen A. Thermo-structural analyses of the in-vessel components of the ITER collective Thomson scattering system. Fusion Engineering and Design 2019. [DOI: 10.1016/j.fusengdes.2019.02.048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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