Extraction of small-diameter beams from single-component plasmas

Journal Article · Mon Feb 19 00:00:00 EST 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2709522· OSTI ID:20971838

Danielson, J R; Weber, T R; Surko, C M ^[1]

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1. Department of Physics, University of California, San Diego, La Jolla, California 92093 (United States)

A nondestructive technique is described to extract small-diameter beams from single-component plasmas confined in a Penning-Malmberg trap following radial compression using a rotating electric field. Pulsed beams with Gaussian radial profiles and diameters as small as 50 {mu}m are extracted from electron plasmas initially 2 mm in diameter. A simple theory for the beam diameter predicts 4{lambda}{sub D} (full width to 1/e), where {lambda}{sub D} is the Debye length, in good agreement with experimental measurements on electron plasmas. Applications and extensions of this technique to create bright, finely focused beams of positrons and other scarce particles are discussed.

• OSTI ID: 20971838
• Journal Information: Applied Physics Letters, Vol. 90, Issue 8; Other Information: DOI: 10.1063/1.2709522; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
43 PARTICLE ACCELERATORS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DEBYE LENGTH
ELECTRIC FIELDS
ELECTRONS
PLASMA
POSITRON BEAMS
POSITRON SOURCES
POSITRONS