Generation of high-energy mono-energetic heavy ion beams by radiation pressure acceleration of ultra-intense laser pulses
Generation of high-energy mono-energetic heavy ion beams by radiation pressure acceleration of ultra-intense laser pulses
复制标题
DOI：
10.1063/1.4904402
复制
发表时间：
2014-03
影响因子：
2.2
通讯作者：
D. Wu;D. Wu;B. Qiao;B. Qiao;C. McGuffey;Xiantu He;F. Beg
中科院分区：
文献类型：
--
作者：
D. Wu;D. Wu;B. Qiao;B. Qiao;C. McGuffey;Xiantu He;F. Beg
研究了利用强激光脉冲的辐射压力加速(RPA)产生高能单能重离子束。与以前研究的质子或轻离子的RPA不同，高Z原子的动态电离可以稳定重离子的加速。提出了一种专门针对重离子束的自组织、稳定的RPA方案，其中当连续的电离态通过惰性气体组态时，要求激光峰值强度与较大的电离能隙相匹配[例如从类氦电荷态(Z−2)+到(Z−1)+移除一个电子]。二维粒子模拟结果表明，在7×1020W/cm2光强下，可以获得峰值能量为1.0GeV、能散仅为5%的单能Al13+束流。较重的单能离子束(Fe26+)将强度提高到1022W/cm2时，可以获得17GeV的峰值能量。
Generation of high-energy mono-energetic heavy ion beams by radiation pressure acceleration (RPA) of intense laser pulses is investigated. Different from previously studied RPA of protons or light ions, the dynamic ionization of high-Z atoms can stabilize the heavy ion acceleration. A self-organized, stable RPA scheme specifically for heavy ion beams is proposed, where the laser peak intensity is required to match with the large ionization energy gap when the successive ionization state passes the noble gas configurations [such as removing an electron from the helium-like charge state (Z−2)+ to (Z−1)+]. Two-dimensional particle-in-cell simulations show that a mono-energetic Al13+ beam with peak energy 1.0 GeV and energy spread of only 5% can be obtained at intensity of 7×1020 W/cm2 through the proposed scheme. A heavier, mono-energetic, ion beam (Fe26+) can attain a peak energy of 17 GeV by increasing the intensity to 1022 W/cm2.