An ac josephson source for johnson noise thermometry

S.P. Benz, J.M. Martinis, P.D. Dresselhaus, Sae Woo Nam
<span title="">2003</span> <i title="Institute of Electrical and Electronics Engineers (IEEE)"> <a target="_blank" rel="noopener" href="" style="color: black;">IEEE Transactions on Instrumentation and Measurement</a> </i> &nbsp;
We have adapted the Josephson arbitrary waveform synthesizer to create a quantized voltage noise source suitable for calibrating the cross-correlation electronics of a Johnson noise thermometer system. The requirements of long term stability and low voltage amplitude allow dramatic simplification of the bias electronics compared to previous bias techniques. We describe the waveform synthesis, the bias technique, and the superconducting integrated circuit used to generate the pseudo-noise
more &raquo; ... ms. Stony Brook, focused on the nanolithographic fabrication and study of Nb-AlO -Nb junctions for single electron and SFQ applications, single electron transistors and arrays in Al-AlO tunnel junctions, and the properties of ultra-small Josephson junctions. Sae Woo Nam received the degrees in physics and electrical engineering from the Massachusetts Institute of Technology,Cambridge, in 1991, and the M.S. and Ph.D. degrees in physics from Stanford University, Stanford, CA, in 1998. His thesis research focused on the development of large cryogenic detectors for direct detection of dark matter particles using superconducting transition-edge sensors for the Cryogenic Dark Matter Search (CDMS) Experiment. As part of the CDMS experiment, he designed the TES readout electronics for 168 independent channels. Also at Stanford University, he was involved with the first demonstration of using TES sensors to directly detect optical photons as well as the first use of a TES optical photon sensor to look at an astronomical object.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="">doi:10.1109/tim.2003.811687</a> <a target="_blank" rel="external noopener" href="">fatcat:iiwjspc3xnhfdnftqfl2xzmksu</a> </span>
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