期刊
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
卷 12, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevSTAB.12.121301
关键词
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资金
- 973 Program [2006CB806004]
- National Natural Science Foundation of China [10675155, 10834008, 60921004, 10835003]
- CAS program [0801051- X00]
- Program of Shanghai Subject Chief Scientists [09XD1404300]
Two-dimensional particle-in cell simulation shows that protons in a small target located in an under-dense high-mass plasma can be accelerated by the radiation pressure of a short circularly polarized laser pulse as well as by the wake bubble field of the laser in the background plasma. The radiation-pressure preaccelerated protons are easily trapped and accelerated stably in front of the bubble for a relatively long distance. It is found that a quasimonoenergetic proton beam of 38 GeV peak energy and 12.6% energy spread as well as small divergence angle can be obtained with a 10(23) W/cm(2) 18.26 kJ laser pulse in a tritium plasma of density 5.2 x 10(20) cm(-3).
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