ALEPH中的意外效应：硅顶点探测器的长期位移
An Unexpected Effect in ALEPH: Long-Term Displacements of the Silicon Vertex Detector
摘要：
ALEPH Silicon Vertex Detector for LEP 2采用激光测量系统来监测其机械稳定性。从1997年到2000年的激光系统数据的分析表明，VDET遭受的时间依赖性位移。这导致与支撑结构的变形兼容，使得设备在数据采集期间缓慢旋转。观察到约20微米的最大局部位移，对应于约10 E-4 rad的旋转。通过使用激光系统数据对对准进行时间相关校正，大大提高了ALEPH数据质量。
英文摘要：
The ALEPH Silicon Vertex Detector for LEP2 featured a laser survey system to monitor its mechanical stability. The analysis of laser system data from 1997 to 2000 showed that VDET suffered a time-dependent displacement. It resulted to be compatible with a deformation of the support structure that made the device to slowly rotate during the data-taking. A maximal local displacement of ~20 microns was observed, corresponding to a rotation of ~10E-4 rad. The implementation of a time-dependent correction on the alignment by using the laser system data led to sizeable improvements on the ALEPH data quality.
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。
