Design and performance of multiloop and washer SQUIDs intended for sub-kelvin operation

被引：13

作者：

Kiviranta, M ^{[1
]}

Penttilä, JS ^{[1
]}

Grönberg, L ^{[1
]}

Hassel, J ^{[1
]}

Virtanen, A ^{[1
]}

Seppä, H ^{[1
]}

机构：

[1] VTT Informat Technol, FIN-02150 Espoo, Finland

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2004年 / 17卷 / 05期

关键词：

D O I：

10.1088/0953-2048/17/5/038

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have developed a set of dc SQUIDs intended for frequency-domain multiplexed readout of transition edge sensor (TES) arrays. The first design is based on the Ketchen-style washer, and has exhibited a 1.2 x 10(-7) Phi(0) Hz(1/2) flux noise both at 4.2 and 0.43 K. The second design is based on the multiloop structure and utilizes the spoke-terminating resistors which double as junction shunts in order to minimize the excess noise due to the resonance damping. The multiloop device has exhibited a 3.5 x 10(-7) Phi(0) Hz(1/2) flux noise level at 4.2 K. The mutual inductances are chosen such that a typical ac-biased TES-based x-ray calorimeter would need only a moderate amount of negative feedback in order to handle the dynamic range of the signal.

引用

页码：S285 / S289

页数：5