Parametric study of helicon wave current drive in NCST

Parametric study of helicon wave current drive in NCST | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Parametric study of helicon wave current drive in NCST J. Y. Gao, X. C. Chen, X. F. Wu, S. Q. Liu This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7909699/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 03 Jan, 2026 Read the published version in Journal of Fusion Energy → Version 1 posted 4 You are reading this latest preprint version Abstract Helicon waves are fast magnetosonic waves that can efficiently drive off-axis plasma current in tokamak plasmas through electron Landau damping (ELD) and transit-time magnetic pumping (TTMP) effect. Simulation of helicon wave current drive (HCD) were conducted for the purpose of increasing the discharge current of the NCST. The influence of electron Landau damping on wave absorption is analyzed based on the dispersion relation. Furthermore, the impacts of wave and plasma parameters on current drive efficiency are studied systematically. The analysis reveals that the dominant mechanism of wave absorption in NCST is ELD when the wave frequency f > 40 MHz. At a frequency of approximately 65 MHz, current drive can generally be achieved to supplement the bootstrap current. In addition, the maximum current drive efficiency can reach 131 kA/MW when the optimal combination , is adopted for the NCST scenario. The conclusions provide a reference and theoretical basis for the design and construction of the helicon wave system in NCST. current drive helicon wave fast wave tokamak Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 03 Jan, 2026 Read the published version in Journal of Fusion Energy → Version 1 posted Editorial decision: Revision requested 26 Oct, 2025 Editor assigned by journal 22 Oct, 2025 Submission checks completed at journal 22 Oct, 2025 First submitted to journal 20 Oct, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7909699","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":535233055,"identity":"b5fc3975-a3c4-4119-9db9-6e0801b16f72","order_by":0,"name":"J. Y. Gao","email":"","orcid":"","institution":"Nanchang University","correspondingAuthor":false,"prefix":"","firstName":"J.","middleName":"Y.","lastName":"Gao","suffix":""},{"id":535233056,"identity":"c2306797-6cd5-4781-9ca8-d2fc3870672b","order_by":1,"name":"X. C. 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Simulation of helicon wave current drive (HCD) were conducted for the purpose of increasing the discharge current of the NCST. The influence of electron Landau damping on wave absorption is analyzed based on the dispersion relation. Furthermore, the impacts of wave and plasma parameters on current drive efficiency are studied systematically. The analysis reveals that the dominant mechanism of wave absorption in NCST is ELD when the wave frequency f\u0026thinsp;\u0026gt;\u0026thinsp;40 MHz. At a frequency of approximately 65 MHz, current drive can generally be achieved to supplement the bootstrap current. In addition, the maximum current drive efficiency can reach 131 kA/MW when the optimal combination \u003cspan class=\"InlineEquation\"\u003e\u003c/span\u003e,\u003cspan class=\"InlineEquation\"\u003e\u003c/span\u003eis adopted for the NCST scenario. 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