Demonstration for a two-axis interferometric tilt sensor in KAGRA |
| |
| Authors: | Keiko Kokeyama June Gyu Park Kyuman Cho Shin Kirii Tomotada Akutsu Masayuki Nakano Shogo Kambara Kunihiko Hasegawa Naoko Ohishi Kohei Doi Seiji Kawamura |
| |
| Institution: | 1. Institute for Cosmic Ray Research, University of Tokyo, Hida, Gifu, Japan;2. Department of Physics, Sogang University, Mapo-Gu, Seoul, South Korea;3. Department of Optical Instrumentation, Korea Basic Science Institute, Yuseong-gu, Daejeon, South Korea;4. National Astronomical Observatory of Japan, Mitaka, Tokyo, Japan;5. University of Toyama, Toyama-shi, Toyama, Japan;6. Nagoya University, Nagoya, Aichi, Japan |
| |
| Abstract: | Recently, a folded Mach–Zehnder interferometer with homodyne in- and quadrature-phase detection was proposed as a high-precision, wide-dynamic range tilt sensor. By way of a practical application and to validate actual performance, two-axis tilt sensors were developed and installed for one mirror of the input mode cleaner cavity in KAGRA, the large-scale cryogenic gravitational-wave telescope in Kamioka, Gifu, Japan. Building on previous work, we have demonstrated that the two-axis tilt sensor has properly sensed the tilt angle changes of the mirror motion with high precision and without calibration. Compared with our initial angular sensor, an optical lever, which is calibrated by using the interferometer tilt sensor, we found that both sensors showed actual tilt motions of the mirror at low frequencies, and the two-axis interferometer sensor has a better sensitivity at higher frequencies. |
| |
| Keywords: | Optical lever Gravitational wave Interferometer Tilt sensor Tilt meter |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
