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icc_meeting_cohen_final.pdf2011-08-14 08:43:21Samuel Cohen

Progress on the PFRC-2 device*

Author: Samuel A Cohen
Requested Type: Poster Only
Submitted: 2011-05-26 11:04:46

Co-authors:

Contact Info:
PPPL
Forrestal Campus
Princeton, NJ   08543
USA

Abstract Text:
Under an ARRA grant, the vessel size, internal magnets, and RF power of the Princeton Field-reversed Configuration device are being upgraded to enable exploration of the creation of stable FRC plasmas with keV ion and electron temperatures. Novel technologies being used include a polycarbonate vacuum vessel, with 87 penetrations for diagnostics, pumping, and cryogenic feedthroughs, and internal high-temperature-superconductor flux conservers. Performance characteristics of these components will be described. The RF plasma heating method is odd-parity rotating magnetic fields (RMFo). Particle acceleration is predicted to result predominantly from the time-varying azimuthal electric field generated by the RMFo near the magnetic null on the midplane of the FRC, with non-linearity in orbital motion responsible for stochastic heating. Ion heating occurs when the RMF frequency is within a factor of ~5 of the ion cyclotron frequency at the FRC’s center, if the RMFo field exceeds a threshold determined by plasma radius, axial magnetic field strength, axial wave number, and a non-linearity parameter characterizing the change in orbital period with energy. Methods to achieve the required conditions and the expected particle energies and confinement qualities will be discussed. PFRC-2 operations are scheduled to begin in December 2011.


*Supported by USDOE Contract No. DE-AC02-76-CHO-3073.

Characterization: A1,A2

Comments:
Co-authors: B. Berlinger1, A. Brooks1, C. Brunkhorst1, M. Edwards1, A. Glasser2, J. Gumbas1, C. Myers1, A.S. Landsman3
1PPPL, Princeton, NJ, USA
2U Wash, Seattle, WA, USA
3ETH, Zurich, SW

University of Washington

Workshop on Innovation in Fusion Science (ICC2011) and
US-Japan Workshop on Compact Torus Plasma
August 16-19, 2011
Seattle, Washington

ICC 2011