Title :
Fast reversed DC measurements on thermal converters using a SINIS Josephson junction array
Author :
Funck, Torsten ; Behr, Ralf ; Klonz, Manfred
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
fDate :
4/1/2001 12:00:00 AM
Abstract :
An array of 7492 SINIS Josephson junctions was used to generate fast reversed dc (FRDC) voltages of approximately 1.1 V for the study of thermoelectric effects in planar multijunction thermal converters (PMJTCs). A bias current source for fast reversal with a frequency of up to 10 kHz has been designed. For the first time, results of Josephson measurements on two different PMJTCs excellently agree with the results obtained using a semiconductor FRDC source within 0.06 μV/V up to 200 Hz. At higher frequencies, a systematic slope in the relative FRDC-DC voltage transfer difference versus the reversing frequency of about 10 -7/kHz has been observed, which could not be measured with the semiconductor source. This slope is probably caused by the rf-filters required in the cryoprobe
Keywords :
superconducting arrays; superconducting junction devices; superconductor-insulator-superconductor devices; thermoelectricity; transfer standards; 1.1 V; Josephson measurements; SINIS Josephson junction array; bias current source; cryoprobe; planar multijunction thermal converters; reversed DC measurements; rf-filters; thermoelectric effects; voltage transfer difference; Capacitance measurement; Electrical resistance measurement; Frequency measurement; Josephson junctions; Resistance heating; Signal generators; Superconducting devices; Thermoelectricity; Time measurement; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
