A prototype of a desktop Josephson voltage standard system with a compact refrigerator has been developed. The performance of the prototype system was evaluated by measuring current-voltage(I-V) characteristics for NbN/TiNx/NbN junction arrays cooled in the system supplied with a microwave(16 GHz). As a result, constant-voltage steps with amplitudes greater than 1 mA were observed on the I-V characteristics, indicating that the system was normally operated. The highest output voltage for the developed system is 1 V. We have a plan to increase it up to 10 V in near future.
|
 |
| A photograph of a desktop Josephson voltage standard system |
|
| Relational Information |
|
|
AIST Today Vol. 2, No. 8 (2002) 18
|
No.6 Autumn 2002
back
> 
