MiniGRAIL progress report 2004

A. de Waard; A. de Waard; Y. Benzaim; G. Frossati; L. Gottardi; H. van der Mark; Jakob Flokstra; M. Podt; M. Bassan; Y. Minenkov; A. Moleti; A. Rocchi; V. Fafone; G.V. Pallottino

doi:10.1088/0264-9381/22/10/012

MiniGRAIL progress report 2004

A. de Waard, A. de Waard, Y. Benzaim, G. Frossati, L. Gottardi, H. van der Mark, Jakob Flokstra, M. Podt, M. Bassan, Y. Minenkov, A. Moleti, A. Rocchi, V. Fafone, G.V. Pallottino

Faculty of Science and Technology

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

The MiniGRAIL detector was improved. The sphere was replaced by a slightly larger one, having a diameter of 68 cm (instead of 65 cm), reducing the resonant frequency by about 200 Hz to around 2.9 kHz. The last four masses of the attenuation system were machined to increase their resonant frequency and improve the attenuation around the resonant frequency of the sphere. In the new sphere, six holes were machined on the TIGA positions for easy mounting of the transducers. During the last cryogenic run, two capacitive transducers and a calibrator were mounted on the sphere. The first transducer was coupled to a double-stage SQUID amplifier having a commercial quantum design SQUID as a first stage and a DROS as a second stage. The second transducer was read by a single-stage quantum design SQUID. During the cryogenic run, the sphere was cooled down to 4 K. The two-stage SQUID had a flux noise of about 1.6 μ0 Hz−1/2. The detector was calibrated and the sensitivity curve of MiniGRAIL was determined.

Original language	Undefined
Pages (from-to)	S215-S219
Number of pages	4
Journal	Classical and quantum gravity
Volume	22
Issue number	10
DOIs	https://doi.org/10.1088/0264-9381/22/10/012
Publication status	Published - 2005

Keywords

METIS-228580
IR-61505

Access to Document

10.1088/0264-9381/22/10/012

Cite this

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title = "MiniGRAIL progress report 2004",

abstract = "The MiniGRAIL detector was improved. The sphere was replaced by a slightly larger one, having a diameter of 68 cm (instead of 65 cm), reducing the resonant frequency by about 200 Hz to around 2.9 kHz. The last four masses of the attenuation system were machined to increase their resonant frequency and improve the attenuation around the resonant frequency of the sphere. In the new sphere, six holes were machined on the TIGA positions for easy mounting of the transducers. During the last cryogenic run, two capacitive transducers and a calibrator were mounted on the sphere. The first transducer was coupled to a double-stage SQUID amplifier having a commercial quantum design SQUID as a first stage and a DROS as a second stage. The second transducer was read by a single-stage quantum design SQUID. During the cryogenic run, the sphere was cooled down to 4 K. The two-stage SQUID had a flux noise of about 1.6 μ0 Hz−1/2. The detector was calibrated and the sensitivity curve of MiniGRAIL was determined.",

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author = "{de Waard}, A. and {de Waard}, A. and Y. Benzaim and G. Frossati and L. Gottardi and {van der Mark}, H. and Jakob Flokstra and M. Podt and M. Bassan and Y. Minenkov and A. Moleti and A. Rocchi and V. Fafone and G.V. Pallottino",

year = "2005",

doi = "10.1088/0264-9381/22/10/012",

language = "Undefined",

volume = "22",

pages = "S215--S219",

journal = "Classical and quantum gravity",

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TY - JOUR

T1 - MiniGRAIL progress report 2004

AU - de Waard, A.

AU - Benzaim, Y.

AU - Frossati, G.

AU - Gottardi, L.

AU - van der Mark, H.

AU - Flokstra, Jakob

AU - Podt, M.

AU - Bassan, M.

AU - Minenkov, Y.

AU - Moleti, A.

AU - Rocchi, A.

AU - Fafone, V.

AU - Pallottino, G.V.

PY - 2005

Y1 - 2005

N2 - The MiniGRAIL detector was improved. The sphere was replaced by a slightly larger one, having a diameter of 68 cm (instead of 65 cm), reducing the resonant frequency by about 200 Hz to around 2.9 kHz. The last four masses of the attenuation system were machined to increase their resonant frequency and improve the attenuation around the resonant frequency of the sphere. In the new sphere, six holes were machined on the TIGA positions for easy mounting of the transducers. During the last cryogenic run, two capacitive transducers and a calibrator were mounted on the sphere. The first transducer was coupled to a double-stage SQUID amplifier having a commercial quantum design SQUID as a first stage and a DROS as a second stage. The second transducer was read by a single-stage quantum design SQUID. During the cryogenic run, the sphere was cooled down to 4 K. The two-stage SQUID had a flux noise of about 1.6 μ0 Hz−1/2. The detector was calibrated and the sensitivity curve of MiniGRAIL was determined.

AB - The MiniGRAIL detector was improved. The sphere was replaced by a slightly larger one, having a diameter of 68 cm (instead of 65 cm), reducing the resonant frequency by about 200 Hz to around 2.9 kHz. The last four masses of the attenuation system were machined to increase their resonant frequency and improve the attenuation around the resonant frequency of the sphere. In the new sphere, six holes were machined on the TIGA positions for easy mounting of the transducers. During the last cryogenic run, two capacitive transducers and a calibrator were mounted on the sphere. The first transducer was coupled to a double-stage SQUID amplifier having a commercial quantum design SQUID as a first stage and a DROS as a second stage. The second transducer was read by a single-stage quantum design SQUID. During the cryogenic run, the sphere was cooled down to 4 K. The two-stage SQUID had a flux noise of about 1.6 μ0 Hz−1/2. The detector was calibrated and the sensitivity curve of MiniGRAIL was determined.

KW - METIS-228580

KW - IR-61505

U2 - 10.1088/0264-9381/22/10/012

DO - 10.1088/0264-9381/22/10/012

M3 - Article

SN - 0264-9381

VL - 22

SP - S215-S219

JO - Classical and quantum gravity

JF - Classical and quantum gravity

IS - 10

ER -