Magnetic Guarding: Experimental and Numerical Results
POSTER
Abstract
The magnetic field topology of Lockheed Martin's Compact Fusion Reactor (CFR) concept requires internal magnetic field coils. Internal coils for similar devices have leveraged levitating coils or coils with magnetically guarded supports. Magnetic guarding of supports has been investigated for multipole devices (theoretically and experimentally) without conclusive results [1-4]. One outstanding question regarding magnetic guarding of supports is the magnitude and behavior of secondary plasma drifts resulting from magnetic guard fields (grad-B drifts, etc). We present magnetic-implicit PIC modeling results and preliminary proof of concept experimental results on magnetic guarding of internal-supports and the subsequent reduction in total plasma losses. \copyright 2017 Lockheed Martin Corporation. All Rights Reserved. [1] B. Lehnert,\textit{ Nature}. 181, 331 (1958); [2] M. Rusbridge, \textit{Plasma Phys}. 13, 977 (1971); [3] H. Forsen, D. Kerst, D. Lencioni, D. Meade, F. Mills, A. Molvik, J. Schmidt, J. Sprott, K. Syman, \textit{Plasma Phys. And Cont. Nucl. Fus. Res., IAEA.} 24, 1, 313 (1969); [4] L. Burkhardt, J. DiMarco, J. Hammel, R. Henson, H. Karr, \textit{Phys. Fluids. }11, 1562 (1968).