Josephson device for voltage measurement

✍ Scribed by A Régent; J.C Villegier; G Angénieux; C Monllor; F Delahaye

• Book ID: 103055450
• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 449 KB
• Volume: 23
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(83)90036-x

✦ Synopsis

This paper describes a new Josephson device with microwave integrated circuit for voltage standard The circuit is essentially made of a resonator (Nb), the Josephson junction (Nb, NbO~c Pb-ln) and a capacitive microstrip section (Pb-ln) which ends the l/part; the dc connections are through Cauer Filters (Nb or Pb-ln). A niobium film is deposited on the opposite side of the fused quartz substrate as a ground plane. The circuit is enclosed in a special package with outside dc and rf connections. The technology ensures very good cyclability and lifetime with storage at room temperature. In liquid helium (4.2 KJ with a very weak rf power less than 0.5 milliwatts at the frequency resonance (11.5 GHz), 100 #A high current steps were obtained near a polarization of 4.5 mV. These devices allows a precision of 1 x 10 -7 on the volt standard when used with a series-parallel divider of fixed value (ratio 225). The precise adjustment of the voltages is made by a slight drift of the/1 frequency of the source, allowed by the high/f coupling factor of the device and the band width of its resonance.

Josephson device for voltage measurement

R6gent, J.C. Villegier,