Influence of radiation reaction force on ultraintense laser-driven ion acceleration
Influence of radiation reaction force on ultraintense laser-driven ion acceleration
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DOI：
10.1103/physreve.91.053105
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发表时间：
2015-05-19
影响因子：
2.4
通讯作者：
McKenna, P.
中科院分区：
文献类型：
--
作者：
Capdessus, R.;McKenna, P.
研究了辐射反作用力在超强激光驱动离子加速中的作用。在激光强度为10(23)W/cm(2)的情况下，相对论粒子模拟证明了这种作用力对电子的作用，显著地增强了相对论透明靶中离子的能量传递，但大大降低了密集等离子体靶中的离子能量。考虑了激光加速电子产生的同步辐射所造成的能量损失，导出了修正的活塞速度和离子能量的表达式。通过比较质子和氢气等离子体的结果，证明了离子质量是重要的。这一结果可以在低温氢靶和氢靶的实验中得到验证。
The role of the radiation reaction force in ultraintense laser-driven ion acceleration is investigated. For laser intensities similar to 10(23)W/cm(2), the action of this force on electrons is demonstrated in relativistic particle-in-cell simulations to significantly enhance the energy transfer to ions in relativistically transparent targets, but strongly reduce the ion energy in dense plasma targets. An expression is derived for the revised piston velocity, and hence ion energy, taking account of energy loses to synchrotron radiation generated by electrons accelerated in the laser field. Ion mass is demonstrated to be important by comparing results obtained with proton and deuteron plasma. The results can be verified in experiments with cryogenic hydrogen and deuterium targets.