Sensitivity of the spherical gravitational wave detector MiniGRAIL operating at 5 K

Journal Article · Thu Nov 15 04:00:00 EST 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.102005· OSTI ID:21027790

Gottardi, L; Waard, A de; Usenko, O; Frossati, G; Podt, M; Flokstra, J; Bassan, M; Fafone, V; Minenkov, Y; Rocchi, A ^[1]

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1. LION, Institute of Physics, Kamerlingh Onnes Laboratorium, Leiden University, Leiden (Netherlands)

We present the performances and the strain sensitivity of the first spherical gravitational wave detector equipped with a capacitive transducer and readout by a low noise two-stage SQUID amplifier and operated at a temperature of 5 K. We characterized the detector performance in terms of thermal and electrical noise in the system output signal. We measured a peak strain sensitivity of 1.5x10{sup -20} Hz{sup -1/2} at 2942.9 Hz. A strain sensitivity of better than 5x10{sup -20} Hz{sup -1/2} has been obtained over a bandwidth of 30 Hz. We expect an improvement of more than 1 order of magnitude when the detector will operate at 50 mK. Our results represent the first step towards the development of an ultracryogenic omnidirectional detector sensitive to gravitational radiation in the 3 kHz range.

• OSTI ID: 21027790
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 10 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLIFIERS
COSMOLOGY
GRAVITATIONAL RADIATION
GRAVITATIONAL WAVE DETECTORS
GRAVITATIONAL WAVES
KHZ RANGE
NOISE
PERFORMANCE
READOUT SYSTEMS
SENSITIVITY
SPHERICAL CONFIGURATION
SQUID DEVICES
TRANSDUCERS