A microwave SQUID multiplexer optimized for bolometric applications
- Univ. of Colorado, Boulder, CO (United States). Dept. of Physics; National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Kavli Institute for Particle Astrophysics and Cosmology
- Univ. of California, San Diego, CA (United States). Dept. of Physics
- National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Univ. of Colorado, Boulder, CO (United States). Dept. of Physics
- Princeton Univ., NJ (United States). Dept. of Physics
- Stanford Univ., CA (United States). Dept. of Physics
A microwave SQUID (superconducting quantum interference device) has been optimized for reading out large arrays of superconducting transition-edge sensor (TES) bolometers. We present the scalable cryogenic multiplexer chip design that may be used to construct an 1820-channel multiplexer for the 4-8 GHz rf band. The key metrics of yield, sensitivity, and crosstalk are determined through measurements of 455 readout channels, which span 4-5 GHz. The median white-noise level is 45 pA/ $$\sqrt{Hz}$$, evaluated at 2 Hz, with a 1/f knee ≤ 20 mHz after common-mode subtraction. The white-noise level decreases the sensitivity of a TES bolometer optimized for detection of the cosmic microwave background at 150 GHz by only 3%. The measured crosstalk between any channel pair is ≤ 0.3%.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1777457
- Alternate ID(s):
- OSTI ID: 1970629
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 6 Vol. 118; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English