Physics feasibility study of a collective Thomson scattering diagnostic for SPARC
The SPARC tokamak is a compact high-field device that will operate at high plasma density with the aim to demonstrate net fusion energy. The experimentally unexplored plasma conditions in SPARC will require a carefully selected set of diagnostics for plasma monitoring and control. Here we explore co...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | Nuclear Fusion |
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| Online Access: | https://doi.org/10.1088/1741-4326/adc143 |
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| author | Mads Mentz-Jørgensen Riccardo Ragona Søren B. Korsholm Jesper Rasmussen |
| author_facet | Mads Mentz-Jørgensen Riccardo Ragona Søren B. Korsholm Jesper Rasmussen |
| author_sort | Mads Mentz-Jørgensen |
| collection | DOAJ |
| description | The SPARC tokamak is a compact high-field device that will operate at high plasma density with the aim to demonstrate net fusion energy. The experimentally unexplored plasma conditions in SPARC will require a carefully selected set of diagnostics for plasma monitoring and control. Here we explore conceptual design options and potential measurement capabilities of a collective Thomson scattering diagnostic at SPARC. We show that a 140 GHz X-mode CTS system is the most attractive option in terms of optimizing the signal-to-noise ratio and limiting sensitivity to refraction, as well as from a technological readiness perspective. Such a setup can provide core-localized measurements of the fusion alpha distribution function, main-ion temperature and toroidal rotation, fuel-ion ratio, and ^3 He content with relevant spatio-temporal resolution. Our proposed diagnostic layout can in principle be integrated into SPARC and could provide a valuable addition to its diagnostic suite at limited development costs and time. |
| format | Article |
| id | doaj-art-2f725c1dd71b4baca4716d71bbdad9b5 |
| institution | Kabale University |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-2f725c1dd71b4baca4716d71bbdad9b52025-08-20T03:42:25ZengIOP PublishingNuclear Fusion0029-55152025-01-0165404602810.1088/1741-4326/adc143Physics feasibility study of a collective Thomson scattering diagnostic for SPARCMads Mentz-Jørgensen0https://orcid.org/0009-0008-3960-9602Riccardo Ragona1https://orcid.org/0000-0002-3225-5732Søren B. Korsholm2https://orcid.org/0000-0001-7160-8361Jesper Rasmussen3https://orcid.org/0000-0002-3947-1518Department of Physics, Technical University of Denmark , 2800 Lyngby, DenmarkDepartment of Physics, Technical University of Denmark , 2800 Lyngby, DenmarkDepartment of Physics, Technical University of Denmark , 2800 Lyngby, DenmarkDepartment of Physics, Technical University of Denmark , 2800 Lyngby, DenmarkThe SPARC tokamak is a compact high-field device that will operate at high plasma density with the aim to demonstrate net fusion energy. The experimentally unexplored plasma conditions in SPARC will require a carefully selected set of diagnostics for plasma monitoring and control. Here we explore conceptual design options and potential measurement capabilities of a collective Thomson scattering diagnostic at SPARC. We show that a 140 GHz X-mode CTS system is the most attractive option in terms of optimizing the signal-to-noise ratio and limiting sensitivity to refraction, as well as from a technological readiness perspective. Such a setup can provide core-localized measurements of the fusion alpha distribution function, main-ion temperature and toroidal rotation, fuel-ion ratio, and ^3 He content with relevant spatio-temporal resolution. Our proposed diagnostic layout can in principle be integrated into SPARC and could provide a valuable addition to its diagnostic suite at limited development costs and time.https://doi.org/10.1088/1741-4326/adc143collective Thomson scatteringSPARCα-particlesfuel ion ratiofusion diagnostic |
| spellingShingle | Mads Mentz-Jørgensen Riccardo Ragona Søren B. Korsholm Jesper Rasmussen Physics feasibility study of a collective Thomson scattering diagnostic for SPARC Nuclear Fusion collective Thomson scattering SPARC α-particles fuel ion ratio fusion diagnostic |
| title | Physics feasibility study of a collective Thomson scattering diagnostic for SPARC |
| title_full | Physics feasibility study of a collective Thomson scattering diagnostic for SPARC |
| title_fullStr | Physics feasibility study of a collective Thomson scattering diagnostic for SPARC |
| title_full_unstemmed | Physics feasibility study of a collective Thomson scattering diagnostic for SPARC |
| title_short | Physics feasibility study of a collective Thomson scattering diagnostic for SPARC |
| title_sort | physics feasibility study of a collective thomson scattering diagnostic for sparc |
| topic | collective Thomson scattering SPARC α-particles fuel ion ratio fusion diagnostic |
| url | https://doi.org/10.1088/1741-4326/adc143 |
| work_keys_str_mv | AT madsmentzjørgensen physicsfeasibilitystudyofacollectivethomsonscatteringdiagnosticforsparc AT riccardoragona physicsfeasibilitystudyofacollectivethomsonscatteringdiagnosticforsparc AT sørenbkorsholm physicsfeasibilitystudyofacollectivethomsonscatteringdiagnosticforsparc AT jesperrasmussen physicsfeasibilitystudyofacollectivethomsonscatteringdiagnosticforsparc |