Frequency Domain Multiplexing of TES Signals by Magnetic Field Summation

Noriko Y. YAMASAKI
Yoh TAKEI
Kensuke MASUI
Kazuhisa MITSUDA
Toshimitsu MOROOKA
Satoshi NAKAYAMA

Publication
IEICE TRANSACTIONS on Electronics   Vol.E89-C    No.2    pp.98-105
Publication Date: 2006/02/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e89-c.2.98
Print ISSN: 0916-8516
Type of Manuscript: Special Section INVITED PAPER (Special Section on Superconducting High-frequency Devices)
Category: 
Keyword: 
X-ray spectroscopy,  pixelized detector,  TES,  SQUID,  

Full Text: PDF(731.6KB)>>
Buy this Article


Summary: 
In frequency-domain multiplexing (FDM) for TES signals, a magnetic field summation method utilizing a multi-input SQUID has the fundamental merit of small degradation of the signal-to-noise ratio. We formulated shifts of the operation point due to a common impedance and cross talk currents. These effects are evaluated for several FDM methods, and the requirements for the bandwidth and filters are summarized. The design parameters of multi-input SQUIDs and a flux locked loop driving circuits are also presented.