A Laser Frequency Transverse Modulation Might Compensate for the Spectral Broadening Due to Large Electron Energy Spread in Thomson Sources
A Laser Frequency Transverse Modulation Might Compensate for the Spectral Broadening Due to Large Electron Energy Spread in Thomson Sources
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DOI：
10.3390/photonics9020062
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发表时间：
2022-01
期刊：
影响因子：
2.4
通讯作者：
V. Petrillo;I. Drebot;G. Krafft;C. Maroli;A. Rossi;M. Rossetti Conti;M. Ruijter;B. Terzić
中科院分区：
文献类型：
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作者：
V. Petrillo;I. Drebot;G. Krafft;C. Maroli;A. Rossi;M. Rossetti Conti;M. Ruijter;B. Terzić
紧凑型激光等离子体加速器产生质量越来越高的高能电子束。然而，当用于逆康普顿背散射时，相对较大的电子能量分布危及需要较小带宽的潜在应用。我们提出了一种新的相互作用方案，通过在激光脉冲中引入横向空间频率调制，我们可以补偿电子能量扩散对光谱的负面影响。这样的激光啁啾，加上适当分散的电子束，可以大大减少由于电子能量扩散而引起的康普顿带宽的展宽。给出了基于激光等离子体加速器的硬X射线汤姆逊源的理论分析和数值模拟。
Compact laser plasma accelerators generate high-energy electron beams with increasing quality. When used in inverse Compton backscattering, however, the relatively large electron energy spread jeopardizes potential applications requiring small bandwidths. We present here a novel interaction scheme that allows us to compensate for the negative effects of the electron energy spread on the spectrum, by introducing a transverse spatial frequency modulation in the laser pulse. Such a laser chirp, together with a properly dispersed electron beam, can substantially reduce the broadening of the Compton bandwidth due to the electron energy spread. We show theoretical analysis and numerical simulations for hard X-ray Thomson sources based on laser plasma accelerators.