Halo current rotation scaling in post-disruption plasmas

Journal Article · 05 January 2022 · Nuclear Fusion

DOI: https://doi.org/10.1088/1741-4326/ac4186 · OSTI ID:1838575

Saperstein, A. R. ; Levesque, J. P. ; Mauel, M. E. ; Navratil, G. A.

Abstract Halo current (HC) rotation during disruptions can be potentially dangerous if resonant with the structures surrounding a tokamak plasma. We propose a drift-frequency-based scaling law for the rotation frequency of the asymmetric component of the HC as a function of toroidal field strength and plasma minor radius ( f _rot ∝ 1/ B _T a ² ). This scaling law is consistent with results reported for many tokamaks and is motivated by the faster HC rotation observed in the HBT-EP tokamak. Projection of the rotation frequency to ITER and SPARC parameters suggest the asymmetric HC rotation will be on the order of 10 Hz and 60 Hz, respectively.

• Research Organization: Columbia University, New York, NY (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC), Fusion Energy Sciences (FES)
• Grant/Contract Number: FG02-86ER53222
• OSTI ID: 1838575
• Journal Information: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 2 Vol. 62; ISSN 0029-5515
• Publisher: IOP PublishingCopyright Statement
• Country of Publication: IAEA
• Language: English