为卡米奥卡重力波探测器 (KAGRA) 开发先进的光子校准器
Y Inoue1,2,3,4, B H Hsieh5, K H Chen1,2,6,7
1Physics Department, National Central University, Taoyuan 32001, Taiwan.
The Review of scientific instruments
|July 27, 2023
概括
卡米奥卡重力波探测器 (KAGRA) 通过高功率激光和改进的束控制来增强其光子校准器. 这种校准升级将系统误差降低到2.0%,这对引力波天文学至关重要.
科学领域:
- 引力波天文学 引力波天文学
- 实验物理学的实验物理.
- 光学仪器仪器仪表的光学仪器仪表.
背景情况:
- 重力波探测器的精确校准对于准确的源参数估计至关重要.
- 光子校准器是激光干扰仪引力波观测仪 (如KAGRA) 的关键工具.
- 卡格拉在2020年4月与GEO600一起参加了联合观测3.
研究的目的:
- 为了增强KAGRA光子校准器的功能,以改进检测器响应校准.
- 为了减少引力波测量中的系统错误.
- 为了描述探测器的旋转响应.
主要方法:
- 实现了高功率的20W激光系统,用于kHz频率校准.
- 安装了一个光学追随器伺服器,用于独立的激光束功率稳定.
- 用于远程光束位置控制和旋转响应的表征的 pico 电机.
- 采用远距离摄像机和象限光探测器来监测光束位置.
主要成果:
- 通过使用高功率激光器成功校准了 kHz 频率的探测器响应.
- 通过精确的光束定位,实现了探测器旋转响应的表征.
- 将光子校准器的总系统误差降低到2.0%.
结论:
- 对KAGRA光子校准器的改进显著提高了校准准确度.
- 升级后的系统有助于更精确地估计引力波源的参数.
- 减少系统错误提高了引力波检测的能力.
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