Adjustable SQUID-resonator direct coupling in microwave SQUID multiplexer for TES microcalorimeter array

IEICE Electronics Express

Yuki Nakashima¹  Kazuhisa Mitsuda¹  Shuichi Nagasawa²  Hirotake Yamamori²  Noriko Y. Yamasaki²  Fuminori Hirayama²  Satoshi Kohjiro² 

[1] Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA);National Institute of Advanced Industrial Science and Technology (AIST)

关键词: microwave SQUID multiplexer;    SQUID readout;    microwave resonators;    superconducting transition edge sensors (TES);    microcalorimeters;   

DOI  :  10.1587/elex.14.20170271

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

We have succeeded in the first demonstration of a simple and accurate resonator-superconducting quantum interference device (SQUID) coupling for microwave SQUID multiplexers. A simple theory shows our direct coupling with adjustable fractional inductance in the SQUID loop can decrease the deviation of resonance frequencies from designed values in contrast to a conventional inductive coupling. Our direct coupling provides the individual coupling that can be optimized with keeping identical structure, shape, and dimension of the SQUID among all pixels on the same chip. It covers experimentally three or potentially more factors of a frequency band that is larger than that of cryogenic high electron mobility transistor amplifiers. The deviation of experimental fractional inductance from the designed one is less than −3/+10%.

【 授权许可】

CC BY