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Observation of Plasma Focusing of a 28.5 GeV Positron Beam

J. S. T. Ng, P. Chen, H. Baldis, P. Bolton, D. Cline, W. Craddock, C. Crawford, F. J. Decker, C. Field, Y. Fukui, V. Kumar, R. Iverson, F. King, R. E. Kirby, K. Nakajima, R. Noble, A. Ogata, P. Raimondi, D. Walz, and A. W. Weidemann
Phys. Rev. Lett. 87, 244801 – Published 19 November 2001
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Abstract

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.

  • Received 21 September 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.244801

©2001 American Physical Society

Authors & Affiliations

J. S. T. Ng1, P. Chen1, H. Baldis2,*, P. Bolton2,†, D. Cline3, W. Craddock1, C. Crawford4, F. J. Decker1, C. Field1, Y. Fukui3, V. Kumar3, R. Iverson1, F. King1, R. E. Kirby1, K. Nakajima5, R. Noble4,‡, A. Ogata6, P. Raimondi1, D. Walz1, and A. W. Weidemann7

  • 1Stanford Linear Accelerator Center, P.O. Box 4349, Stanford, California 94309
  • 2Lawrence Livermore National Laboratory, Livermore, California 94551
  • 3University of California, Los Angeles, California 90024
  • 4Fermi National Accelerator Laboratory, Batavia, Illinois 60510
  • 5High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801 Japan
  • 6Hiroshima University, Kagamiyama, Higashi-Hiroshima, 739-8526 Japan
  • 7Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennesee 37996

  • *Also at Department of Applied Science, University of California, Davis, California.
  • Now at SLAC, Stanford University, Stanford, California.
  • Now at SLAC, Stanford University, Stanford, California.

See Also

Plasma Puts the Squeeze on Positrons

Geoff Brumfiel
Phys. Rev. Focus 8, 30 (2001)

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Vol. 87, Iss. 24 — 10 December 2001

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