Dc- and un-SQUIDs for readout of ac-biased transition-edge sensors

Author

Kiviranta, Mikko ; Penttila, Jari S. ; Gronberg, Leif ; Seppa, Heikki ; Suni, Ilkka

Author_Institution

VTT Inf. Technol., Espoo, Finland

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

614

Lastpage

617

Abstract

We have developed a set of SQUIDs optimized for readout of ac-biased transition edge sensors. Junction shunts are made of Pd and attached to cooling fins to facilitate low-noise operation at sub-kelvin temperatures. SQUID´s have a low loop inductance in order to reach a large natural dynamic range even without negative feedback. The SQUIDs are intended to be used for frequency-domain multiplexing of X-ray calorimeter arrays. Both traditional dc-SQUIDs and novel un-SQUIDs are manufactured. The fabrication process and SQUID design criteria are reviewed.

Keywords

SQUIDs; X-ray detection; X-ray imaging; calorimeters; inductance; palladium; superconducting device noise; Pd; X-ray calorimeter arrays; ac-biased transition-edge sensors; cooling fins; dc-SQUIDs; fabrication process; frequency-domain multiplexing; junction shunts; loop inductance; low-noise operation; natural dynamic range; negative feedback; readout; sub-kelvin temperatures; un-SQUIDs; Cooling; Dynamic range; Fabrication; Inductance; Manufacturing; Negative feedback; Negative feedback loops; Process design; SQUIDs; Temperature sensors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.813962

Filename

1211678