Geophysical noise in the virgo gravitational antenna

Gusev, A. V.; Manukin, A. B.; Rudenko, V. N.; Samoǐlenko, A. A.; Tsybankov, I. V.; Yushkin, V. D.; Giazotto, A.; Braccini, S.; Majorana, E.; Mantovani, M.; Ruggi, P.

doi:10.1007/s11018-009-9245-z

Cited by 5 publications

(4 citation statements)

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“…Indirect estimate can be extracted from the Virgo geophysical channel (signal of control circuits). From the geo data of VSR2/VSR1 series presented in [8,17] after substracting "theoretical tide" we have found the estimate of residual strain noise standard on the order of (10 −11 − 10 −12 ) 1/Hz 1/2 . Mostly it corresponds to the frequency interval (0.1 − 0.01) Hz It is well known just in this interval a damping of seismic noise spectral density takes place.…”

Section: Resultsmentioning

confidence: 99%

“…Obviously voltages of correcting drivers are proportional to geophysical deformations of the interferometer base. First experimental realization of these ideas was demonstrated at the VIRGO interferometer [8] during scientific runs VSR-1,VSR-2. It was proved that the large scale gravitational wave interferometer can successfully operate as a very sensitive two coordinate strain meter.…”

Section: Introductionmentioning

confidence: 99%

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Low frequency signals of large scale GW-interferometers

Gusev,

Rudenko,

Yudin

2013

Preprint

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Application of the large scale gravitational wave interferometers for measurement of geophysical signals at very low frequencies is considered. Analysis is concentrated on the mechanism of penetration of quasistatic geophysical perturbation through the main interferometer output. It is shown that it has a parametrical nature resulted in slow variations of the optical transfer function of the interferometer. Geophysical modulation index is calculated for any harmonical component of the output spectrum, but mainly for a photon circulation frequency appeared in the case of stochastic illumination of modes neighbour to the central resonance. Value of the effect is estimated for different operational regimes of the device. For improvement of geophysical signal readout a modernization of the instrument with using of two component resonance optical pump is proposed and a correspondent calculation is carried out. Numerical estimations for different regimes of the setup are given together with discussion of possible application for measuring some weak gravitational effects.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low frequency signals of large scale GW-interferometers

Gusev,

Rudenko,

Yudin

2013

Preprint

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“…Present-day publications discuss the opportunity of a search for infra-low-frequency geophysical signals with the aid of long-base laser interferometric gravitational antennas such as LIGO (USA) or VIRGO (France and Italy) [1][2][3]. The basic sensitive element of such installations is a Michelson interferometer with complex mirrors.…”

Section: Introductionmentioning

confidence: 99%

“…In [3], the VIRGO laser interferometric gravitational antenna is considered as a new geophysical instrument, a laser deformographer with a base L 3 km. A detection of infra-low-frequency geophysical signals is carried out by means of a spectral analysis of random process realization in the control circuits of the suspended mirror (test mass) positions.…”

Section: Introductionmentioning

confidence: 99%