Title :
1:30000 cryogenic current comparator with optimum squid readout
Author :
Bartolome, E. ; Sese, J. ; Rietveld, Gert ; Flokstra, J. ; Rillo, C. ; Camon, Agustin ; Rogalla, H.
Author_Institution :
Dept. of Appl. Phys., Twente Univ., Enschede, Netherlands
Abstract :
We developed a 1:30000 Cryogenic Current Comparator for SET current amplification. A dedicated low-noise, directly-coupled SQUID was used for the readout, which allowed reaching a sensitivity close to ideal. The ratio error was <9/spl times/10/sup -9/. The CCC-SQUID equivalent current input noise was 3.0 fA/Hz/sup 1/2/, measured down to 0.1 Hz.
Keywords :
SQUIDs; current comparators; readout electronics; single electron transistors; superconducting device noise; DC SQUID readout; SET current amplification; cryogenic current comparator; equivalent current input noise; ratio error; sensitivity; Crosstalk; Cryogenics; Current measurement; Inductance; Lead; Niobium; SQUIDs; Superconducting coils; Superconducting device noise; Temperature measurement;
Conference_Titel :
Precision Electromagnetic Measurements, 2002. Conference Digest 2002 Conference on
Conference_Location :
Ottawa, Ontario, Canada
Print_ISBN :
0-7803-7242-5
DOI :
10.1109/CPEM.2002.1034830
