A frequency-domain read-out technique suitable for large microcalorimeter arrays demonstrated using high-resolution cryogenic gamma-ray sensors

Published

June 1, 2003

Author(s)

Joel Ullom, M. Cunningham, T. Miyazaki, S. E. Lebov

Abstract

Cryogenic sensors composed of transition-biased superconducting films have demonstrated remarkable sensitivity at gamma-ray, x-ray, optical, and submillimeter wavelengths. However, for these sensors to find widespread application in astronomy and materials analysis, technologies for building and reading-out large arrays are required. We are currently developing a frequency-domain multiplexing scheme for the read-out of large numbers of microcalorimeters using a much smaller number of amplifiers. In this scheme, each sensor is biased at an identifying frequency and operated in a series LC circuit to suppress out-of-band noise. Here, we present results demonstrating the undegraded operation of two gamma-ray sensors multiplexed using this technique. In addition, we provide a series of design rules which relate the minimum bias frequency and the values of the reactive elements in the system to a small number of sensor properties. Finally, we discuss the ultimate limits on the number of sensors that can be measured with a single amplifier.

Citation

IEEE Transactions on Applied Superconductivity

Volume

13

Issue

2

Pub Type

Journals

Keywords

microcalorimeters, multiplexing, SQUIDs, transition-edge sensors

Citation

Ullom, J. , Cunningham, M. , Miyazaki, T. and Lebov, S. (2003), A frequency-domain read-out technique suitable for large microcalorimeter arrays demonstrated using high-resolution cryogenic gamma-ray sensors, IEEE Transactions on Applied Superconductivity (Accessed October 27, 2025)