Relative narrow bandwidth-high energy radiation can be produced through Thomson scattering, where highly relativistic electrons collide with a laser pulse. The bandwidth of such a source is determined, among others factors, by the bandwidth of the laser pulse and the energy spread of the electrons. Here we investigate how the bandwidth of such a source can be minimized, with a particular emphasis on electron bunches with a correlated energy spread of several percent, that are typical for plasma based accelerator schemes. We show that by introducing a chirp on the laser pulse it is possible to compensate the broadening effect due to the energy spread of the electrons, and obtain the same bandwidth as a quasi-monochromatic plane wave laser pulse colliding with a monoenergetic electron bunch. Ultimately, the bandwidth of a Thomson source is limited by the acceptance angle and the initial transverse momentum of electrons (emittance).

中文翻译：

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减小具有有限能量散布的电子束的线性和非线性Thomson散射辐射的带宽

相对窄的带宽-高能辐射可以通过汤姆森散射产生，高相对论性电子与激光脉冲碰撞。除其他因素外，这种源的带宽由激光脉冲的带宽和电子的能量散布确定。在这里，我们研究了如何最小化这种源的带宽，特别着重于具有相关能量散布百分之几的电子束，这是基于等离子加速器方案的典型特征。我们表明，通过在激光脉冲上引入线性调频，可以补偿由于电子的能量扩散而引起的加宽效应，并获得与碰撞单能量电子束的准单色平面波激光脉冲相同的带宽。最终，