Mirror actuation design for the interferometer control of the KAGRA gravitational wave telescope. (25th October 2017)

• Record Type: Journal Article
• Authors: Michimura, Yuta; Shimoda, Tomofumi; Miyamoto, Takahiro; Shoda, Ayaka; Okutomi, Koki; Fujii, Yoshinori; Tanaka, Hiroki; Barton, Mark A; Takahashi, Ryutaro; Aso, Yoichi; Akutsu, Tomotada; Ando, Masaki; Enomoto, Yutaro; Flaminio, Raffaele; Hayama, Kazuhiro; Hirose, Eiichi; Inoue, Yuki; Kajita, Takaaki; Kamiizumi, Masahiro; Kawamura, Seiji; Kokeyama, Keiko; Komori, Kentaro; Kumar, Rahul; Miyakawa, Osamu; Nagano, Koji; Nakano, Masayuki; Ohishi, Naoko; Pin Ooi, Ching; Erasmo Peña Arellano, Fabián; Saito, Yoshio; Shimode, Katsuhiko; Somiya, Kentaro; Takeda, Hiroki; Tomaru, Takayuki; Uchiyama, Takashi; Ushiba, Takafumi; Yamamoto, Kazuhiro; Yokozawa, Takaaki; Yuzurihara, Hirotaka;
• Is Part Of: Classical and quantum gravity. Volume 34:Number 22(2017:Nov.)
• Publication Date: 2017-10-25
• Subjects: gravitational waves -- cryogenic laser interferometer -- vibration isolation -- coil-magnet actuator -- lock acquisition; Quantum gravity -- Periodicals; Gravitation -- Periodicals; Relativity (Physics) -- Periodicals; Space and time -- Periodicals; Periodicals; 521.1
• DOI: 10.1088/1361-6382/aa90e3
• Languages: English
• ISSNs: 0264-9381

Abstract

Abstract: KAGRA is a 3 km cryogenic interferometric gravitational wave telescope located at an underground site in Japan. In order to achieve its target sensitivity, the relative positions of the mirrors of the interferometer must be finely adjusted with attached actuators. We have developed a model to simulate the length control loops of the KAGRA interferometer with realistic suspension responses and various noises for mirror actuation. Using our model, we have designed the actuation parameters to have sufficient force range to acquire lock as well as to control all the length degrees of freedom without introducing excess noise.