KAGRA概述：校准、探测器特性、物理环境监测器和光物理干涉仪
Overview of KAGRA: Calibration, detector characterization, physical environmental monitors, and the geophysics interferometer
摘要：
KAGRA是一个新建成的引力波观测站，是一个臂长3公里的激光干涉仪，位于日本岐阜县的神冈市。在本系列文章中，我们概述了KAGRA基线，我们在2019年完成了设计配置的安装。本文介绍了用于从探测器输出重建引力波信号的校准方法（CAL），以及探测器（DET）的特性。本文还介绍了物理环境监测系统（PEM）和光物理干涉仪（GIF）。两者都用于表征和评估引力波通道的数据质量。它们在利用探测器输出进行引力波搜索方面起着重要作用。在不久的将来，一旦实现了引力波探测，并在引力波天文学时代使用KAGRA，这些特性研究将更加重要。
英文摘要：
KAGRA is a newly built gravitational wave observatory, a laser interferometer with a 3 km arm length, located in Kamioka, Gifu, Japan. In this series of articles, we present an overview of the baseline KAGRA, for which we finished installing the designed configuration in 2019. This article describes the method of calibration (CAL) used for reconstructing gravitational wave signals from the detector outputs, as well as the characterization of the detector (DET). We also review the physical environmental monitors (PEM) system and the geophysics interferometer (GIF). Both are used for characterizing and evaluating the data quality of the gravitational wave channel. They play important roles in utilizing the detector output for gravitational wave searches. These characterization investigations will be even more important in the near future, once gravitational wave detection has been achieved, and in using KAGRA in the gravitational wave astronomy era.
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