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- W128351650 abstract "A Japanese laser interferometer gravitational wave antenna, TAMA300, has been developed and recently a power recycling system was implemented. The interferometer is finally operating in the designed optical configuration, with improved sensitivity, 1 × 10 −18 mHz −1/2 in displacement at around 1 kHz. With this sensitivity the antenna can be expected to have an ability to sense the spacetime strain caused by the coalescence of neutron star binaries within our galaxy with a signal to noise ratio better than 40. In this paper, the implementation of the recycling system and the corresponding improvement in the sensitivity are reported in addition to the review of the system. 1. Overview The TAMA project is a major Japanese effort in the field of gravitational wave detection, including the construction, development, and operation of a laser interferometer gravitational wave antenna of baseline length of 300 m, as well as R&D for a future full-scale antenna. Another scope of the project is to be a global leader in observation of various source of gravitational waves (GWs) in our galaxy. The antenna has been developed at the Mitaka campus of the National Astronomical Observatory, Tokyo (35 ◦ 40’N,139 ◦ 32’E). The project was begun in 1995 [1]. The infrastructure was completed in 1996, the vacuum system in 1997. After developments of indispensable subsystems, we succeeded to operate the Fabry-Perot Michelson interferometer in 1999. Various improvements of the system and the sensitivity were made in the succeeding period, to perform several engineering and observational runs (called Data Taking). In the end of 2001, the power recycling system [2] was installed as a final step to realize the designed optical configuration. After a period of time when noise reduction was being performed, 1000 hours of observational data was collected from February to April 2003 (DT8). The designed sensitivity limit of TAMA300 is hrms ∼ 3 × 10 −21 at 300 Hz with a bandwidth of 300 Hz, which corresponds to h =2 × 10 −22 Hz −1/2 in the power spectrum density." @default.
- W128351650 created "2016-06-24" @default.
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- W128351650 date "2003-01-01" @default.
- W128351650 modified "2023-09-24" @default.
- W128351650 title "Current Status of TAMA300" @default.
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- W128351650 hasPublicationYear "2003" @default.
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