Cryocooled 10 V Programmable Josephson Voltage Standard

被引：27

作者：

Ruefenacht, Alain ^{[1
]}

Howe, Logan A. ^{[1
]}

Fox, Anna E. ^{[1
]}

Schwall, Robert E. ^{[1
]}

Dresselhaus, Paul D. ^{[1
]}

Burroughs, Charles J., Jr. ^{[1
]}

Benz, Samuel P. ^{[1
]}

机构：

[1] NIST, Boulder, CO 80305 USA

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2015年 / 64卷 / 06期

关键词：

Josephson arrays; quantization; standards; superconducting integrated circuits; voltage measurement;

D O I：

10.1109/TIM.2014.2374697

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The two main challenges to operating a programmable Josephson voltage standard (PJVS) on a cryocooler are the available cooling power and the temperature oscillations of the cold head. We overcame these challenges and successfully operated a PJVS circuit on a cryocooler by employing one supercritical helium buffer that damps the temperature oscillations, developing a new cryogenic package that increases the thermal conductivity between the chip and the cold head, and increasing overall device performance with fabrication improvements. A 1.32 mA step width of the quantized voltage produced with all of the subarrays of the PJVS circuit biased was achieved at an operating temperature of 4.3 K. The quantum accuracy of the PJVS is maintained at temperatures up to 4.8 K. This result was obtained with a cryocooler that employs a 3 kW water-cooled compressor to produce at the chip about 270 mW of net cooling power at 4.3 K.(1)

引用

页码：1477 / 1482

页数：6

共 19 条

[1] NIST 10 V Programmable Josephson Voltage Standard System [J].