Observation of plasma focusing of a 28.5 GeV positron beam.
The observation of plasma focusing of a 28.5 GeV positron beam is reported. The plasma was formed by ionizing a nitrogen jet only 3 mm thick. Simultaneous focusing in both transverse dimensions was observed with effective focusing strengths of order tesla per micron. The minimum area of the beam spot was reduced by a factor of 2.0+/-0.3 by the plasma. The longitudinal beam envelope was measured and compared with numerical calculations.
Ng
J S
JS
Stanford Linear Accelerator Center, P.O. Box 4349, Stanford, California 94309, USA.
Chen
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P
Baldis
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Bolton
P
P
Cline
D
D
Craddock
W
W
Crawford
C
C
Decker
F J
FJ
Field
C
C
Fukui
Y
Y
Kumar
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V
Iverson
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R
King
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F
Kirby
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RE
Nakajima
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K
Noble
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Ogata
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A
Raimondi
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Walz
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Weidemann
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