Apr 16 – 20, 2024
National Museum of Natural Science
Asia/Taipei timezone

Monitor system for positions of KAGRA’s cryogenic mirrors and beam spots by Telephoto Camera (TCam)

Not scheduled
National Museum of Natural Science

National Museum of Natural Science

No.1, Guanqian Rd., North Dist., Taichung City 404023, Taiwan


Dr Hirotaka Yuzurihara (ICRR, U-tokyo)


KAGRA is a ground-based gravitational wave telescope at the Kamioka mine in Gifu prefecture, Japan. KAGRA has a Telephoto Camera (TCam) that combines the telescope and a digital camera to monitor four cryogenic mirrors. We developed the monitor system for the positions of the mirrors and the beam spots on mirrors. This talk shows the results of long-term measurements of height changes during cooling down and the results of identifying beam spots. We will mention the limitations of the current TCam and the recent activities toward the future upgrade of the TCam system. These technological developments can be applied to the next-generation gravitational wave telescopes, such as the Einstein Telescope and the LIGO Voyager.

Primary author

Dr Hirotaka Yuzurihara (ICRR, U-tokyo)

Presentation materials

There are no materials yet.