PETRA Laser -丝束流剖面测量与模拟
Beam Profile Measurements and Simulations of the PETRA Laser-Wire
摘要：
激光线将是国际直线对撞机的一个重要诊断工具。它使用精细聚焦的激光束，通过检测激光束与电子束相交处下游的康普顿散射光子（或退化电子）来测量电子束团的横向轮廓。这种系统已经安装在DESY的PETRA储存环上，它使用压电驱动镜来扫描激光穿过电子束。最新的实验数据采集的结果，并比较详细的模拟使用Geant 4为基础的程序BDSIM。
英文摘要：
The Laser-wire will be an essential diagnostic tool at the International Linear Collider. It uses a finely focussed laser beam to measure the transverse profile of electron bunches by detecting the Compton-scattered photons (or degraded electrons) downstream of where the laser beam intersects the electron beam. Such a system has been installed at the PETRA storage ring at DESY, which uses a piezo-driven mirror to scan the laser-light across the electron beam. Lat- est results of experimental data taking are presented and compared to detailed simulations using the Geant4 based program BDSIM.
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