A de Waard et al 2006 Class. Quantum Grav. 23 S79 doi:10.1088/0264-9381/23/8/S11
Preparing for science run 1 of MiniGRAIL
A de Waard1, M Bassan2, Y Benzaim1, V Fafone3, J Flokstra4, G Frossati1, L Gottardi1, C T Herbschleb1, A Karbalai-Sadegh1, K Kuit4, H van der Mark1, Y Minenkov5, J B R Oonk1, G V Pallottino6, J Pleikies4, A Rocchi2, O Usenko1 and M Visco7
Show affiliationsWe report on the eighth cryogenic run of MiniGRAIL, which is planned to be the first science run. Three new capacitive transducers were mounted on the sphere, all coupled to superconducting transformers and a double-stage SQUID amplifier. All SQUID modules had a noise level between 1 and 2 μΦ0 Hz−1/2 at 4 K in separate test runs. The detector was upgraded with a complete data acquisition and data storage system, and a data analysis program for millisecond burst signals was written using a matched filter. Two cosmic-ray detectors were built and installed on the roof above MiniGRAIL as a veto for cosmic rays. A test run was done, but failed because of bad electrical isolation of the transducer electrode at low temperatures. A new cool-down is currently going on. With an already obtained sphere temperature of 65 mK and a SQUID noise of 100
, the expected sensitivity should be 4 × 10−22 Hz−1/2.
- PACS
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07.20.Mc Cryogenics; refrigerators, low-temperature equipment
04.80.Nn Gravitational wave detectors and experiments
85.25.Dq Superconducting quantum interference devices (SQUIDs)
95.55.Vj Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors
- MSC
- Subjects
- Dates
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Issue 8 (21 April 2006)
Received 5 October 2005, in final form 2 December 2005
Published 24 March 2006
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Preparing for science run 1 of MiniGRAIL
A de Waard et al 2006 Class. Quantum Grav. 23 S79
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