论文标题
激烈的电子束中的噪音
Noise In Intense Electron Bunches
论文作者
论文摘要
我们报告了对电子束密度波动的调查。相对论电子束中的噪声和密度波动在LINAC中加速，对于各种相干电子冷却（CEC）[1-5]概念以及自由电子激光（FELS）至关重要。对于CEC，光束噪声会导致其他扩散以抵消冷却。在Sase Fels中，微不稳定性从光束中的初始噪声开始，最终导致梁微构成产生相干辐射，而FEL带宽中的初始噪声起着有用的作用。相比之下，在种子叶片中，这种噪声会干扰种子信号，因此在初始种子波长处降低噪声会降低种子激光功率的需求[6-8]。该项目的状态将介绍。
We report on our investigations into density fluctuations in electron bunches. Noise and density fluctuations in relativistic electron bunches, accelerated in a linac, are of critical importance to various Coherent Electron Cooling (CEC) [1-5] concepts as well as to free-electron lasers (FELs). For CEC, the beam noise results in additional diffusion that counteracts cooling. In SASE FELs, a micro-wave instability starts from the initial noise in the beam and eventually leads to the beam microbunching yielding coherent radiation, and the initial noise in the FEL bandwidth plays a useful role. In seeded FELs, in contrast, such noise interferes with the seed signal, so that reducing noise at the initial seed wavelength would lower the seed laser power requirement [6-8]. Status of the project will be presented.
