|Budget Amount *help
¥181,480,000 (Direct Cost: ¥139,600,000、Indirect Cost: ¥41,880,000)
Fiscal Year 2021: ¥35,360,000 (Direct Cost: ¥27,200,000、Indirect Cost: ¥8,160,000)
Fiscal Year 2020: ¥33,150,000 (Direct Cost: ¥25,500,000、Indirect Cost: ¥7,650,000)
Fiscal Year 2019: ¥48,360,000 (Direct Cost: ¥37,200,000、Indirect Cost: ¥11,160,000)
Fiscal Year 2018: ¥37,830,000 (Direct Cost: ¥29,100,000、Indirect Cost: ¥8,730,000)
Fiscal Year 2017: ¥26,780,000 (Direct Cost: ¥20,600,000、Indirect Cost: ¥6,180,000)
|Outline of Final Research Achievements
Calibration to accurately obtain the distortion of space-time is indispensable in gravitational wave observation. In this research, we promoted the research on calibration from both hardware and data analysis.
In the KAGRA experiment in Japan, we constructed a "photon calibrator" that excites the transition of the mirror using laser light radiation pressure. Achieved relative calibration of laser intensity for calibration in collaboration with US LIGO. Furthermore, the indeterminacy of the calibration hardware was suppressed to about 1 to 2%. At the 3rd International Joint Observation in 2020, KAGRA calibration data was generated, and observation data was shared in real time with LIGO in the United States and Virgo in Europe, contributing to the international gravitational wave observation network.
We also developed a new analysis method in the time-frequency domain.