论文标题
血浆和结构中Wakefield响应的纵向电流轮廓重建
Longitudinal current profile reconstruction from wakefield response in plasmas and structures
论文作者
论文摘要
当今和下一代加速器，尤其是用于驱动韦克菲尔德方案的应用，需要纵向束塑形和随之而来的纵向表征来实验优化。在这里，我们提出了一种诊断方法，该方法在韦克菲尔德产生源的位置重建了纵向梁的轮廓。提出的方法仅来自韦克菲尔德效应引起的时间分辨的质心能量变化，从而得出了带电颗粒光束的纵向轮廓。重建技术基于一种反卷积算法，该算法完全可以概括为任何分析或数值可计算的绿色功能用于Wakefield激发机制。该方法显示出在纵向电流分布重建中产生精确的特征。我们使用模拟和实验示例在等离子体和介电结构中证明了该技术的准确性和功效，并与可用的实验测量的纵向束参数进行了比较。还检查了分辨率和适用性的限制。
Present-day and next-generation accelerators, particularly for applications in driving wakefield-based schemes, require longitudinal beam shaping and attendant longitudinal characterization for experimental optimization. Here we present a diagnostic method which reconstructs the longitudinal beam profile at the location of a wakefield-generating source. The methods presented derive the longitudinal profile of a charged particle beam solely from measurement of the time-resolved centroid energy change due to wakefield effects. The reconstruction technique is based on a deconvolution algorithm that is fully generalizable to any analytically or numerically calculable Green's function for the wakefield excitation mechanism. This method is shown to yield precise features in the longitudinal current distribution reconstruction. We demonstrate the accuracy and efficacy of this technique using simulations and experimental examples, in both plasmas and dielectric structures, and compare to the experimentally measured longitudinal beam parameters as available. The limits of resolution and applicability to relevant scenarios are also examined.
