Associate Professor(Senior Lecturer)    Takahashi, Ryutaro

Research Field

• Detection of gravitational waves

Brief Introduction of Research

• I am developing gravitational wave detectors. Gravitational wave is propagation of space-time distortion predicted by general relativity, and was detected directly by LIGO group for the first time in 2015. We scope to join to the international network of gravitational wave observation by constructing KAGRA underground of Kamioka mine in Japan. I am in charge of vibration isolation system for KAGRA, and developing the seismic attenuation system fitting to the environment of Kamioka. I research also ultra high vacuum.

Main Research Achievements

• R. Takahashi, J. Mizuno, S. Miyoki, N. Kawashima: Control of a 10m Delay-Line Laser Interferometer Using the Pre-modulation Method, Phys. Lett. A187 (1994) 157
• M. Ando, K. Arai, R. Takahashi, et al.: Stable Operation of a 300-m Laser Interferometer with Sufficient Sensitivity to Detect Gravitational-Wave Events within Our Galaxy, Phys. Rev. Lett., 86 (2001) 3950
• R. Takahashi, et al.: Direct measurement of residual gas effect on the sensitivity in TAMA300, J. Vac. Sci. Technol. A20(4) (2002) 1237
• R. Takahashi, K. Arai, S. Kawamura, and M. Smith: Direct measurement of the scattered light effect on the sensitivity in TAMA300, Phys. Rev. D70 (2004) 062003
• R. Takahashi, et al.: Operational status of TAMA300 with the Seismic Attenuation System (SAS), Class. Quantum Grav., 25 (2008) 114036

Contact us

• ryu.takahashi[at]nao.ac.jp
  (In the mailing address, replace [at] with @)