Details

Autor(en) / Beteiligte

• Kvashnin, N. N.
• Kuvshinskyi, M. V.
• Oreshkin, S. I.
• Popov, S. M.
• Rudenko, V. N.
• Skvortsov, M. N.
• Yudin, I. S.
• Blagov, S. V.

Titel

Cryogenic Model of the Gravitational Antenna OGRAN

Ist Teil von

• Physics of atomic nuclei, 2017-12, Vol.80 (10), p.1606-1612

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The optoacoustic gravitational-wave antenna (OGRAN) located in the underground laboratory of the Baksan Neutrino Observatory has a limited sensitivity sufficient only to detect gravitational radiation from astronomical objects at a distance of 100 kpc. In order to cover sources in the zone with a radius of up to 15 Mpc, it is proposed to economically upgrade the antenna and cool down the body of the acoustic detector to a temperature of liquid nitrogen of ~78 K [1]. In this case, the spectral density of the Brownian noise of the detector decreases owing to temperature and also owing to the subsequent increase in its acoustic Q factor by one and a half to two orders of magnitude. This paper presents the results of an experiment for testing these ideas on the cryo-OGRAN prototype while preserving the optical detection scheme used for the uncooled antenna.