2024-03-29T00:46:49Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00009525
2023-01-16T03:55:13Z
336:695:696
Laser-interferometric detectors for gravitational wave backgrounds at 100 MHz: Detector design and sensitivity
Nishizawa, Atsushi
Kawamura, Seiji
Akutsu, Tomotada
Arai, Koji
Yamamoto, Kazuhiro
Tatsumi, Daisuke
Nishida, Erina
Sakagami, Masa-aki
Chiba, Takeshi
Takahashi, Ryuichi
Sugiyama, Naoshi
open access
American Physical Society, All rights reserved.
Recently, observational searches for gravitational wave background (GWB) have been developed and given direct and indirect constraints on the energy density of GWB in a broad range of frequencies. These constraints have already rejected some theoretical models of large GWB spectra. However, at 100 MHz, there is no strict upper limit from direct observation, though the indirect limit by 2He abundance due to big-bang nucleosynthesis exists. In this paper, we propose an experiment with laser interferometers searching GWB at 100 MHz. We considered three detector designs and evaluated the GW response functions of a single detector. As a result, we found that, at 100 MHz, the most sensitive detector is the design, a so-called synchronous recycling interferometer, which has better sensitivity than an ordinary Fabry-Perot Michelson interferometer by a factor of 3.3 at 100 MHz. When we select the arm length of 0.75 m and realistic optical parameters, the best sensitivity achievable is h ≈ 7.8 ×10^{-21} Hz^{-1/2} at 100 MHz with bandwidth ~2 kHz.
American Physical Society
2008-01
eng
journal article
VoR
http://hdl.handle.net/2237/11308
https://nagoya.repo.nii.ac.jp/records/9525
https://doi.org/10.1103/PhysRevD.77.022002
1550-7998
PHYSICAL REVIEW D
77
2
022002
022002
https://nagoya.repo.nii.ac.jp/record/9525/files/PhysRevD_77_022002.pdf
application/pdf
386.8 kB
2018-02-20