Emittance of positron beams produced in intense laser plasma interaction

Journal Article · Tue Jan 15 04:00:00 EST 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4789621· OSTI ID:22113380

Hui, Chen; Hazi, A.; Link, A.; Anderson, S.; Gronberg, J.; Izumi, N.; Tommasini, R.; Wilks, S. ^[1]; Sheppard, J. C. ^[2]; Meyerhofer, D. D. ^[3]; Baldis, H. A.; Marley, E.; Park, J.; Williams, G. J. ^[4]; Fedosejev, R.; Kerr, S. ^[5]

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1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
2. SLAC, Standford University, Menlo Park, California 94025 (United States)
3. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)
4. Department of Electrical and Computer Engineering, University of California, Davis, California 95616 (United States)
5. Department of Applied Science, University of Alberta, Alberta T6G 2R3 (Canada)

The first measurement of the emittance of intense laser-produced positron beams has been made. The emittance values were derived through measurements of positron beam divergence and source size for different peak positron energies under various laser conditions. For one of these laser conditions, we used a one dimensional pepper-pot technique to refine the emittance value. The laser-produced positrons have a geometric emittance between 100 and 500 mm{center_dot}mrad, comparable to the positron sources used at existing accelerators. With 10{sup 10}-10{sup 12} positrons per bunch, this low emittance beam, which is quasi-monoenergetic in the energy range of 5-20 MeV, may be useful as an alternative positron source for future accelerators.

• OSTI ID: 22113380
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCELERATORS
BEAM EMITTANCE
INTERACTIONS
LASER RADIATION
LIGHT TRANSMISSION
MEV RANGE
ONE-DIMENSIONAL CALCULATIONS
PLASMA
PLASMA DIAGNOSTICS
POSITRON BEAMS
POSITRON SOURCES