arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0909.3960physics.ins-det
收藏

ILC的精密旋光测量:概念、模拟和实验

Precision Polarimetry at the ILC: Concepts, Simulations and experiments

Christoph Bartels, Anthony Hartin, Christian Helebrant, Daniela Kaefer, Jenny List

摘要:

ILC的精密物理程序需要精确的光束偏振态知识。事实上,用于ILC的康普顿偏振计必须测量偏振,误差比SLAC SLD实验中以前的最佳测量小2倍。为了进一步减少测量误差,自旋跟踪模拟ILC光束传输系统受到地面运动引起的未对准已经进行,并在偏振的预期变化已经量化。研制了一台高精度的激光束与带电束相互作用康普顿散射电子谱仪样机。康普顿电子与偏振计通道中的气体相互作用,产生由光电探测器测量的切伦科夫辐射。光电探测器的校准是至关重要的,并且已经进行了光电探测器线性的详尽的台架测试。旋光仪原型本身将于2009年春季在波恩的ELSA试验梁上进行测试。

英文摘要:

The precision physics program of the ILC requires precise knowledge of the state of beam polarisation. In fact the Compton polarimeters intended for the ILC will have to measure the polarisation with error a factor of 2 smaller than the previous best measurement at the SLAC SLD experiment. In order to further reduce measurement error, spin tracking simulations in the ILC Beam Delivery System subject to ground motion induced misalignment have been performed and the expected variation in polarisation has been quantified. A prototype of a high precision spectrometer to record Compton scattered electrons from the interaction of a longitudinal laser and the charged beams has been developed. The Compton electrons interact with a gas in the polarimeter channels to produce Cherenkov radiation measured by photodetectors. The calibration of the photodetectors is crucial and exhaustive bench tests of the photodetector linearity have been performed. The polarimeter prototype itself will be tested at the ELSA testbeam in Bonn in Spring 2009.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑