Shell-Based Support Structure for the 45 GHz ECR Ion Source MARS-D

Journal Article · Thu Mar 10 00:00:00 EST 2022 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/tasc.2022.3158375· OSTI ID:1896481

Juchno, M. ^[1]; Benitez, J. Y. ^[1]; Doyle, J. ^[1]; Hodgkinson, A. ^[1]; Leow, T. ^[1]; Phair, L. W. ^[1]; Todd, D. S. ^[1]; Wang, L. ^[1]; Xie, D. Z. ^[1]

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1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Superconducting electron cyclotron resonance ion sources (ECRISs) using NbTi coils and optimized for 28 GHz resonant heating have been successfully operated for almost two decades. Moving to higher heating frequencies requires increased magnetic fields, but traditional racetrack-and-solenoid ECRIS structures are at their limit using NbTi. Rather than moving to a superconductor untested in this field, we report the Mixed Axial and Radial field System (MARS) being developed at Lawrence Berkeley National Laboratory employs a novel closed-loop-coil design that more efficiently utilizes conductor fields and will allow the use of NbTi in a next-generation, 45 GHz ECRIS. This article presents the design of the shell-based support structure central to the MARS-D magnet design, as well as structural analysis of its components and optimization of pre-load parameters that will guarantee its successful operation.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1896481
• Journal Information: IEEE Transactions on Applied Superconductivity, Journal Name: IEEE Transactions on Applied Superconductivity Journal Issue: 6 Vol. 32; ISSN 1051-8223
• Publisher: IEEE
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ECR ion source
magnet structure
minimum-B fields
special coils
superconducting magnets