Design considerations for optimizing the transient CHI injector on QUEST
Rattachement africain : us, jp. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Abstract Transient coaxial helicity injection (transient CHI) on the QUEST (Q-shu University Experiment with Steady-State ST) spherical tokamak (ST) has recently validated the floating biased electrode configuration for solenoid-free plasma startup. In support of a significant divertor upgrade on QUEST, the details of the transient CHI injector geometry on QUEST have been examined more closely using tokamak simulation code (TSC) simulations. QUEST uses a HIT-II-like (Helicity Injected Torus) injector configuration in which the injector region is comprised of coaxial injector electrodes located in the lower part of the machine. TSC simulations indicate high injector flux operation may benefit from an increased gap between the coaxial electrodes. This is the first study to examine the differences between an open and closed electrode configuration for solenoid-free plasma startup using transient CHI. Results show that both configurations can generate similar levels of closed flux, but the closed configuration may be easier to implement in some ST designs as a much smaller portion of the injector needs to be close to the injector flux coil. Results show that increasing the electrode gap width from the present 10.8 cm to about 15–20 cm would increase the closed flux fraction by about 40%. The results presented in this paper are generally applicable to the CHI design for other STs.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Design considerations for optimizing the transient CHI injector on QUEST
- Date Crossref
- 04/09/2025
- Éditeur
- IOP Publishing
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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University of Washington Department of Aeronautics and Astronautics pays non établi dans la noticeUniversité ou école supérieure
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American Institute of Aeronautics and Astronautics pays non établi dans la noticeInstitution
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Princeton Plasma Physics Laboratory pays non établi dans la noticeStructure de recherche
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Kyushu University Research Institute for Applied Mechanics pays non établi dans la noticeUniversité ou école supérieure
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Japan Coast Guard Academy pays non établi dans la noticeUniversité ou école supérieure
Department of Aeronautics and Astronautics — University of Washington, American Institute of Aeronautics and Astronautics et Princeton Plasma Physics Laboratory, avec 2 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.