An automatic digital data‐acquisition system for the test and characterization of superconducting Josephson tunnel junctions is presented. The key feature is represented by the high degree of interaction of the measurement system with the device under test. This is accomplished by an iterated sequence of data acquisitions, automatic analysis, and subsequent modifications of the control signals in the device. In this way, the basic calibration and the value of the relevant quantities involved with the Josephson junction are automatically determined. A connection with a host computer makes possible more complex data analysis, while the full control of the experiment by a dedicated computer allows the operator to perform nonroutine procedures. KEYWORDS and PACS Keywords JOSEPHSON JUNCTIONS, JOSEPHSON EFFECT, SINE−GORDON EQUATION, SUPERCONDUCTING DEVICES, DATA ACQUISITION, ELECTRIC CURRENTS, ELECTRIC POTENTIAL, MICROWAVE RADIATION, AMPLITUDES PACS 85.25.Cp Josephson devices 07.05.Hd Data acquisition: hardware and software 07.05.Kf Data analysis: algorithms and implementation; data management 07.05.Rm Data presentation and visualization: algorithms and implementation ARTICLE DATA Digital Object Identifier http://dx.doi.org/10.1063/1.1140635 PUBLICATION DATA ISSN 0034-6748 (print) 1089-7623 (online)
Computer-assisted data acquisition on Josephson junctions
PAGANO, Sergio;
1989-01-01
Abstract
An automatic digital data‐acquisition system for the test and characterization of superconducting Josephson tunnel junctions is presented. The key feature is represented by the high degree of interaction of the measurement system with the device under test. This is accomplished by an iterated sequence of data acquisitions, automatic analysis, and subsequent modifications of the control signals in the device. In this way, the basic calibration and the value of the relevant quantities involved with the Josephson junction are automatically determined. A connection with a host computer makes possible more complex data analysis, while the full control of the experiment by a dedicated computer allows the operator to perform nonroutine procedures. KEYWORDS and PACS Keywords JOSEPHSON JUNCTIONS, JOSEPHSON EFFECT, SINE−GORDON EQUATION, SUPERCONDUCTING DEVICES, DATA ACQUISITION, ELECTRIC CURRENTS, ELECTRIC POTENTIAL, MICROWAVE RADIATION, AMPLITUDES PACS 85.25.Cp Josephson devices 07.05.Hd Data acquisition: hardware and software 07.05.Kf Data analysis: algorithms and implementation; data management 07.05.Rm Data presentation and visualization: algorithms and implementation ARTICLE DATA Digital Object Identifier http://dx.doi.org/10.1063/1.1140635 PUBLICATION DATA ISSN 0034-6748 (print) 1089-7623 (online)I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
