Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
61 (1992), S. 1231-1233
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We report on the design and performance of a planar microwave rf-SQUID readout by a cryogenic preamplifier. The SQUID-sensor consists of a planar half-wavelength microstrip resonator, into which the SQUID-loop is integrated. The pump frequency is 1.7 GHz. The cryogenic preamplifier employs a microwave high electron mobility transistor (HEMT), located close to the SQUID sensor. Measurements of the flux noise and the fractional step rise parameter were carried out in the temperature range between 4.2 and 1.5 K. In an open loop white flux noise values of 2×10−6 Φ0/(square root of)Hz were obtained at 4.2 K.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.107604
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