Two-stage SQUID system and transducers development for MiniGrail

L. Gottardi; M. Podt; Jakob Flokstra; M. Bassan; A. Karbalai-Sadegh; Y. Minenkov; W. Reinke; A. Shumack; S. Srinivas; A. de Waard; A. de Waard; G. Frossati

doi:10.1088/0264-9381/21/5/118

Two-stage SQUID system and transducers development for MiniGrail

L. Gottardi
, M. Podt
, Jakob Flokstra
, M. Bassan
, A. Karbalai-Sadegh
, Y. Minenkov
, W. Reinke
, A. Shumack
, S. Srinivas
, A. de Waard
, A. de Waard
, G. Frossati

Faculty of Science and Technology

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

13 Citations (Scopus)

3 Downloads (Pure)

Abstract

We present measurements on a two-stage SQUID system based on a dc-SQUID as a sensor and a DROS as an amplifier. We measured the intrinsic noise of the dc-SQUID at 4.2 K. A new dc-SQUID has been fabricated. It was specially designed to be used with MiniGRAIL transducers. Cooling fins have been added in order to improve the cooling of the SQUID and the design is optimized to achieve the quantum limit of the sensor SQUID at temperatures above 100 mK. In this paper we also report the effect of the deposition of a Nb film on the quality factor of a small mass Al5056 resonator. Finally, the results of Q-factor measurements on a capacitive transducer for the current MiniGRAIL run are presented.

Original language	Undefined
Pages (from-to)	1191-1196
Number of pages	6
Journal	Classical and quantum gravity
Volume	21
Issue number	5
DOIs	https://doi.org/10.1088/0264-9381/21/5/118
Publication status	Published - 2004

Keywords

METIS-219638
IR-61509

Access to Document

10.1088/0264-9381/21/5/118

Cite this

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title = "Two-stage SQUID system and transducers development for MiniGrail",

abstract = "We present measurements on a two-stage SQUID system based on a dc-SQUID as a sensor and a DROS as an amplifier. We measured the intrinsic noise of the dc-SQUID at 4.2 K. A new dc-SQUID has been fabricated. It was specially designed to be used with MiniGRAIL transducers. Cooling fins have been added in order to improve the cooling of the SQUID and the design is optimized to achieve the quantum limit of the sensor SQUID at temperatures above 100 mK. In this paper we also report the effect of the deposition of a Nb film on the quality factor of a small mass Al5056 resonator. Finally, the results of Q-factor measurements on a capacitive transducer for the current MiniGRAIL run are presented.",

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TY - JOUR

T1 - Two-stage SQUID system and transducers development for MiniGrail

AU - Gottardi, L.

AU - Podt, M.

AU - Flokstra, Jakob

AU - Bassan, M.

AU - Karbalai-Sadegh, A.

AU - Minenkov, Y.

AU - Reinke, W.

AU - Shumack, A.

AU - Srinivas, S.

AU - de Waard, A.

AU - Frossati, G.

PY - 2004

Y1 - 2004

N2 - We present measurements on a two-stage SQUID system based on a dc-SQUID as a sensor and a DROS as an amplifier. We measured the intrinsic noise of the dc-SQUID at 4.2 K. A new dc-SQUID has been fabricated. It was specially designed to be used with MiniGRAIL transducers. Cooling fins have been added in order to improve the cooling of the SQUID and the design is optimized to achieve the quantum limit of the sensor SQUID at temperatures above 100 mK. In this paper we also report the effect of the deposition of a Nb film on the quality factor of a small mass Al5056 resonator. Finally, the results of Q-factor measurements on a capacitive transducer for the current MiniGRAIL run are presented.

AB - We present measurements on a two-stage SQUID system based on a dc-SQUID as a sensor and a DROS as an amplifier. We measured the intrinsic noise of the dc-SQUID at 4.2 K. A new dc-SQUID has been fabricated. It was specially designed to be used with MiniGRAIL transducers. Cooling fins have been added in order to improve the cooling of the SQUID and the design is optimized to achieve the quantum limit of the sensor SQUID at temperatures above 100 mK. In this paper we also report the effect of the deposition of a Nb film on the quality factor of a small mass Al5056 resonator. Finally, the results of Q-factor measurements on a capacitive transducer for the current MiniGRAIL run are presented.

KW - METIS-219638

KW - IR-61509

U2 - 10.1088/0264-9381/21/5/118

DO - 10.1088/0264-9381/21/5/118

M3 - Article

SN - 0264-9381

VL - 21

SP - 1191

EP - 1196

JO - Classical and quantum gravity

JF - Classical and quantum gravity

IS - 5

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