Electron Plasmas Cooled by Cyclotron-Cavity Resonance.
We observe that high-Q electromagnetic cavity resonances increase the cyclotron cooling rate of pure electron plasmas held in a Penning-Malmberg trap when the electron cyclotron frequency, controlled by tuning the magnetic field, matches the frequency of standing wave modes in the cavity. For certain modes and trapping configurations, this can increase the cooling rate by factors of 10 or more. In this Letter, we investigate the variation of the cooling rate and equilibrium plasma temperatures over a wide range of parameters, including the plasma density, plasma position, electron number, and magnetic field.
Lawrence Livermore National Laboratory, Livermore, California 94550, USA.|Department of Physics, University of California, Berkeley, California 94720, USA.
A P
AP
Povilus
Department of Physics and Astronomy, Beloit College, Beloit, Wisconsin 53511, USA.
N D
ND
DeTal
Department of Physics, University of California, Berkeley, California 94720, USA.
L T
LT
Evans
Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
N
N
Evetts
Department of Physics, University of California, Berkeley, California 94720, USA.
J
J
Fajans
Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
W N
WN
Hardy
Department of Physics, University of California, Berkeley, California 94720, USA.
E D
ED
Hunter
Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
I
I
Martens
Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA.
F
F
Robicheaux
Department of Physics, University of California, Berkeley, California 94720, USA.
S
S
Shanman
Department of Physics, University of California, Berkeley, California 94720, USA.
C
C
So
Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA.
X
X
Wang
Department of Physics, University of California, Berkeley, California 94720, USA.
J S
JS
Wurtele