Dynamic control of laser-produced proton beams
Dynamic control of laser-produced proton beams
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DOI：
10.1103/physrevlett.100.105004
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发表时间：
2008-03-14
影响因子：
8.6
通讯作者：
Zepf, M.
中科院分区：
文献类型：
--
作者：
Kar, S.;Markey, K.;Zepf, M.
强激光驱动质子的发射特性是用在几ps时间尺度上变化的超强（10（9）V/m的量级）静电场控制的。场结构通过利用靶的高电势（在激光相互作用期间达到多MV）来实现。适当成形的靶导致质子束发散度的减小，并且因此导致质子通量的增加，同时保持高的束质量。峰值聚焦功率及其时间变化被示出为取决于目标特性，允许固有的高度发散的光束的准直和消色差静电透镜的设计。
The emission characteristics of intense laser driven protons are controlled using ultrastrong (of the order of 10(9) V/m) electrostatic fields varying on a few ps time scale. The field structures are achieved by exploiting the high potential of the target (reaching multi-MV during the laser interaction). Suitably shaped targets result in a reduction in the proton beam divergence, and hence an increase in proton flux while preserving the high beam quality. The peak focusing power and its temporal variation are shown to depend on the target characteristics, allowing for the collimation of the inherently highly divergent beam and the design of achromatic electrostatic lenses.