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X-ray synchrotron radiation in a plasma wiggler.

机译：等离子体摆动器中的X射线同步加速器辐射。

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A relativistic electron beam can radiate due to its betatron motion inside an ion channel. The ion channel is induced by the electron bunch as it propagates through an underdense plasma. In the theory section of this thesis the formation of the ion channel, the trajectories of beam electrons inside the ion channel, the radiation power and the radiation spectrum of the spontaneous emission are studied. The comparison between different plasma wiggler schemes is made. The difficulties in realizing stimulated emission as the beam traverses the ion channel are investigated, with particular emphasis on the bunching mechanism, which is important for the ion channel free electron laser. This thesis reports an experiment conducted at the Stanford Linear Accelerator Center (SLAC) to measure the betatron X-ray radiations for the first time. We first describe the construction and characterization of the lithium plasma source. In the experiment, the transverse oscillations of the SLAC 28.5 GeV electron beam traversing through a 1.4 meter long lithium plasma source are clearly seen. These oscillations lead to a quadratic density dependence of the spontaneously emitted betatron X-ray radiation. The divergence angle of the X-ray radiation is measured. The absolute photon yield and the spectral brightness at 14.2 KeV photon energy are estimated and seen to be in reasonable agreement with theory.
机译：相对论电子束由于其离子加速器在离子通道内的运动而可以辐射。当电子束通过低密度等离子体传播时，该离子通道被电子束感应。在本文的理论部分，研究了离子通道的形成，离子通道内部束电子的轨迹，自发辐射的辐射功率和辐射光谱。比较了不同的等离子摆动器方案。研究了束流穿过离子通道时实现受激发射的困难，特别着重于聚束机制，这对于离子通道自由电子激光器很重要。本文报道了在斯坦福线性加速器中心（SLAC）进行的一项实验，首次测量了电子感应加速器的X射线辐射。我们首先描述锂等离子体源的构造和表征。在实验中，可以清楚地看到SLAC 28.5 GeV 电子束穿过1.4米长的锂等离子体源的横向振荡。这些振荡导致自发发射的电子感应加速器X射线辐射的平方密度依赖性。测量X射线辐射的发散角。估算了绝对光子产量和在14.2 光子能量处的光谱亮度，并与理论相符。

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