A self-biasing cryogenic particle detector utilizing electrothermal feedback and a SQUID readout

Author

Irwin, K.D. ; Nam, S.W. ; Cabrera, B. ; Chugg, B. ; Park, G.S. ; Welty, R.P. ; Martinis, J.M.

Author_Institution

Stanford Univ., CA, USA

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

2690

Lastpage

2693

Abstract

We are developing and testing a new type of superconducting transition edge sensor for phonon mediated particle detection. This sensor consists of a superconducting tungsten thin film deposited on a silicon substrate. The temperature of the film is held constant within the superconducting transition (T/sub c//spl ap/70 mK) by an electrothermal feedback process, while the substrate temperature is well below the film temperature. Phonon energy deposited in the film is removed by a reduction in feedback Joule heating, which is measured using a series array of DC SQUIDs. The resulting signals show improvements in linearity and signal to noise ratio over our previous transition edge sensors.<>

Keywords

SQUIDs; feedback; superconducting device noise; superconducting device testing; superconducting particle detectors; tungsten; Joule heating; SQUID readout; W-Si; electrothermal feedback; linearity; phonons; self-biasing cryogenic particle detector; series array; signal to noise ratio; silicon substrate; superconducting transition edge sensor; tungsten thin film; Cryogenics; Electrothermal effects; Feedback; Phonons; Radiation detectors; SQUIDs; Superconducting films; Superconducting transition temperature; Temperature sensors; Thin film sensors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.403145

Filename

403145