New Frontier of Gravitational Wave Research

引力波研究新前沿

• 批准号: 13048101
• 负责人: TSUBONO Kimio
• 金额: $ 33.28万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13048101/
• 关键词: Gravitational Waves; Laser Interferometer; Astrophysics; High precision measurement; Geodesy; Black Hole; Neutron Star; Big Bang; 連星合体; 一般相対論; 重力理論; 精密計測

We have improved the sensitivity of the TAMA300 gravitational wave (GW) detector at higher frequencies by implementing the power recycling scheme. At the same time, we have made improvements on various parts of the detector such as data aquisition and optical system. With a higher sensitivity and a more stable status of the detector, we performed coincidence run with LIGO detectors for two months from February 2003. The results of the coincidence search among the both data were already published by the TAMA-LIGO collaboration. We have collected over 3,000 hours data of TAMA300 and published the upper limits on the chirp GWs from binary coalescences, ring-down GWs from black hole formation and continuous GWs from pulsars.We are also developing the next generation detector, LCGT which can attain a better sensitivity by two orders compared with TAMA detector. Low temperature techniques, low frequency vibration isolation and high power lasers which are necessary for the construction of the next detector are almost ready to use in the LCGT detector. We have constructed a 100-m arm-length low-temperature detector, CLIO at Kamioka mine to demonstrate the feasibility of the next detector. We also constructed a strain meter to monitor the dynamics of the deep Earth. We developed very quiet refrigerators which will be used in the detector to cool-down the mirrors.We have made progresses at the studies on the tunable interferometers and atomic interferometers with cooled Rb atoms. A space interferometer, DECIGO was proposed from the theoretical study of the deci-heltz GW sources. DECIGO attracts the attention as a detector which can observe the early Universe. We have just stared the theoretical and technical investigation for the realization of the DECIGO space detector. By this program, as described above,. we could make a great step toward the establishment of the GW astronomy in Japan.

项目成果

Active vibration isolation using a Suspension Point Interferometer

• DOI: 10.1088/1742-6596/32/1/069
• 发表时间: 2006-03
• 作者: Y. Aso;M. Ando;S. Otsuka;K. Tsubono

Systematic measurement of the intrinsic losses in various kinds of bulk fused silica

• DOI: 10.1016/j.physleta.2004.05.028
• 发表时间: 2004-04
• 期刊: Physics Letters A
• 影响因子: 2.6
• 作者: K. Numata;K. Yamamoto;H. Ishimoto;S. Otsuka;K. Kawabe;M. Ando;K. Tsubono

Kunihito Ioka: "A Possible Origin of Lognormal Distributions in Gamma-Ray Bursts"Astrophys. J. Letters. 570. L21-L24 (2002)

Kunihito Ioka：“伽马射线爆发中对数正态分布的可能起源”天体物理学。

Zhu, Z.: "Cardassian Expansion : Constraints from Compact Radio Source Angular Size versus Redshift Data"Astrophys. J.. 581. 1-4 (2002)

Zhu, Z.：“卡达西膨胀：紧凑射电源角大小与红移数据的约束”天体物理学。

K.Kuroda: "Progress in Gravitational Wave Detection : Interferometers, K. Kuroda and LCGT Collaboration"Nuclear Physics B (Proc. Suppl.). 110. 202-208 (2002)

K.Kuroda：“引力波探测的进展：干涉仪，K.Kuroda 和 LCGT 合作”《核物理 B》（Proc. Suppl.）。