Quasi-monoenergetic femtosecond photon sources from Thomson Scattering using laser plasma accelerators and plasma channels
Quasi-monoenergetic femtosecond photon sources from Thomson Scattering using laser plasma accelerators and plasma channels
复制标题
DOI：
10.1088/0953-4075/47/23/234013
复制
发表时间：
2014-06
期刊：
影响因子：
--
通讯作者：
S. Rykovanov;C. Geddes;J. Vay;C. Schroeder;E. Esarey;W. Leemans
中科院分区：
文献类型：
--
作者：
S. Rykovanov;C. Geddes;J. Vay;C. Schroeder;E. Esarey;W. Leemans
窄带宽、高能光子源可以通过高能电子的激光汤姆逊散射产生，并且需要对相互作用进行详细控制以产生高质量的光源。我们提出了能量角光谱和光子产率的分析计算，这些计算对电子和激光束参数的影响进行了参数化，以允许源设计。这些计算与数值模拟相结合，用于评估在真空中使用传统散射的源以及通过激光波导或等离子体通道改进源的方法。我们表明，在相互作用过程中使用等离子体通道引导激光可以大大增加光子通量。相反，我们表明，为了产生给定数量的光子，通过使用等离子体通道，所需的激光能量可以减少一个数量级。此外，我们还表明等离子体可以用作紧凑的束流收集器，其中电子束在短距离内减速，从而大大减少辐射屏蔽。定量显示诸如横向抖动之类的现实实验误差是可以容忍的。提供了与核共振荧光和光裂变相关的设计示例。
Narrow bandwidth, high energy photon sources can be generated by Thomson scattering of laser light from energetic electrons, and detailed control of the interaction is needed to produce high quality sources. We present analytic calculations of the energy-angular spectra and photon yield that parametrize the influences of the electron and laser beam parameters to allow source design. These calculations, combined with numerical simulations, are applied to evaluate sources using conventional scattering in vacuum and methods for improving the source via laser waveguides or plasma channels. We show that the photon flux can be greatly increased by using a plasma channel to guide the laser during the interaction. Conversely, we show that to produce a given number of photons, the required laser energy can be reduced by an order of magnitude through the use of a plasma channel. In addition, we show that a plasma can be used as a compact beam dump, in which the electron beam is decelerated in a short distance, thereby greatly reducing radiation shielding. Realistic experimental errors such as transverse jitter are quantitatively shown to be tolerable. Examples of designs relevant to nuclear resonance fluorescence and photofission are provided.