Journal
PHYSICS OF PLASMAS
Volume 20, Issue 11, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4831943
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Funding
- 973 Program [2011CB808104]
- National Natural Science Foundation of China [11335013, 11125526, 11305236]
- International S&T Cooperation Program of China [2011DFA11300]
- Shanghai Natural Science Foundation [13ZR1463300]
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A cascaded target normal sheath acceleration (TNSA) scheme is proposed to simultaneously increase energy and improve energy spread of a laser-produced mono-energetic proton beam. An optimum condition that uses the maximum sheath field to accelerate the center of the proton beam is theoretically found and verified by two-dimensional particle-in-cell simulations. An initial 10 MeV proton beam is accelerated to 21 MeV with energy spread decreased from 5% to 2% under the optimum condition during the process of the cascaded TNSA. The scheme opens a way to scale proton energy lineally with laser energy. (C) 2013 AIP Publishing LLC.
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