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Title: Control of target-normal-sheath-accelerated protons from a guiding cone

It is demonstrated through particle-in-cell simulations that target-normal-sheath-accelerated protons can be well controlled by using a guiding cone. Compared to a conventional planar target, both the collimation and number density of proton beams are substantially improved, giving a high-quality proton beam which maintained for a longer distance without degradation. The effect is attributed to the radial electric field resulting from the charge due to the hot target electrons propagating along the cone surface. This electric field can effectively suppress the spatial spread of the protons after the expansion of the hot electrons.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ; ; ;  [1] ;  [4]
  1. College of Science, National University of Defense Technology, Changsha 410073 (China)
  2. (Germany)
  3. (China)
  4. Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf, Düsseldorf 40225 (Germany)
Publication Date:
OSTI Identifier:
22410447
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCELERATION; COMPUTERIZED SIMULATION; CONES; CONTROL; ELECTRIC FIELDS; ELECTRONS; PLASMA SHEATH; PROTON BEAMS; TARGETS