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Title: Charge steering of laser plasma accelerated fast ions in a liquid spray — creation of MeV negative ion and neutral atom beams

The scenario of “electron capture and loss” has been recently proposed for the formation of negative ion and neutral atom beams with up to MeV kinetic energy [S. Ter-Avetisyan, et al., Appl. Phys. Lett. 99, 051501 (2011)]. Validation of these processes and of their generic nature is here provided in experiments where the ion source and the interaction medium have been spatially separated. Fast positive ions accelerated from a laser plasma source are sent through a cold spray where their charge is changed. Such formed neutral atom or negative ion has nearly the same momentum as the original positive ion. Experiments are released for protons, carbon, and oxygen ions and corresponding beams of negative ions and neutral atoms have been obtained. The electron capture and loss phenomenon is confirmed to be the origin of the negative ion and neutral atom beams. The equilibrium ratios of different charge components and cross sections have been measured. Our method is general and allows the creation of beams of neutral atoms and negative ions for different species which inherit the characteristics of the positive ion source.
Authors:
; ; ;  [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5] ;  [6] ; ;  [7] ;  [8]
  1. Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin (Germany)
  2. Institute for Laser and Plasma Physics, Heinrich Heine University, Duesseldorf 40225 (Germany)
  3. School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT7 1NN (United Kingdom)
  4. (Czech Republic)
  5. (Russian Federation)
  6. WCU Department of Nanobio Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju (Korea, Republic of)
  7. Centre Lasers Intenses et Applications, University of Bordeaux, CEA, CNRS, 33405 Talence (France)
  8. ELI–Beamlines, Institute of Physics, Czech Academy of Science, 18221 Prague (Czech Republic)
Publication Date:
OSTI Identifier:
22218442
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 11; Other Information: (c) 2013 © 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 43 PARTICLE ACCELERATORS; ANIONS; ATOMIC BEAMS; ATOMS; BEAM PRODUCTION; BEAM-PLASMA SYSTEMS; CARBON IONS; CATIONS; ELECTRON CAPTURE; ION BEAMS; KINETIC ENERGY; LASER-PRODUCED PLASMA; LASERS; MEV RANGE; OXYGEN; OXYGEN IONS; PLASMA; PLASMA BEAM INJECTION; PROTONS