Frequency-Domain Multiplexed Readout of Transition-Edge SensorArrays with a Superconducting Quantum Interference Device
We demonstrate an eight-channel frequency-domain readout multiplexer for superconducting transition-edge sensors (TESs). Each sensor is biased with a sinusoidal voltage at a unique frequency. The sensor currents are summed and measured with a single superconducting quantum interference device (SQUID) array. The 100-element SQUID array is operated with shunt feedback electronics that have a slew rate of 1.2 x 107PHI 0/s at 1 MHz. The multiplexer readout noise is 6.5 pA/sqrt Hz, which is well below the expected sensor noise of 15 pA/sqrt Hz. We measure an upper limit on adjacent channel cross talk of 0.004, which meets our design requirements. The demodulated noise spectra of multiplexed TESs are white at frequencies down to 200 mHz.
- Research Organization:
- Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
- Sponsoring Organization:
- USDOE Director. Office of Science. Office of Basic EnergySciences. Materials Science and Engineering Division and Office of HighEnergy and Nuclear Physics Division; National Science Foundation GrantAST-00-96933, National Aeronautics and Space Administration GrantNAG5-11422
- DOE Contract Number:
- AC02-05CH11231
- OSTI ID:
- 888762
- Report Number(s):
- LBNL--57726; BnR: KA1503020
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Vol. 86; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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