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Applied Physics Letters / Volume 96 / Issue 10 / PLASMAS AND ELECTRICAL DISCHARGES

Appl. Phys. Lett. 96, 101502 (2010); http://dx.doi.org/10.1063/1.3354005 (3 pages)

Strong drive compression of a gas-cooled positron plasma

D. B. Cassidy1, R. G. Greaves2, V. E. Meligne1,2, and A. P. Mills1

1Department of Physics and Astronomy, University of California, Riverside, California 92521-0413, USA
2First Point Scientific, Inc., 5330 Derry Avenue, Suite J, Agoura Hills, California 91301, USA

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(Received 24 December 2009; accepted 15 February 2010; published online 8 March 2010)

The use of rotating electric fields to control plasmas has found numerous applications in the manipulation and storage of antimatter. When used in strong magnetic fields plasma heating caused by the applied field is mitigated by cyclotron cooling, leading to an efficient broadband mode of compression known as the strong drive regime. We have found that it is possible to access the strong drive regime in a low field trap where cyclotron cooling is negligible and a gas is used for cooling, and we have been able to compress positron plasmas to more than 10% of the Brillouin density limit.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

cosmology, cyclotron radiation, plasma confinement, plasma heating, positrons

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3354005

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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    Slow dumps indicate that the plasmas usually have a (parallel) temperature of ~0.1  eV [D. L. Eggleston, C. F. Driscoll, B. R. Beck, A. W. Hyatt, and J. H. Malmberg, Phys. Fluids B 4, 3432 (1992)PFBPEI000004000010003432000001] but that this rises dramatically near a ZFM resonance. Because these latter plasmas are intrinsically unstable it is not possible to reliably measure their temperatures, but from an inspection of the emission profiles we estimate that it is >1  eV, indicating that the ZFM is a strong source of plasma heating.

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