File:NISTvoltChip.jpg
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Captions
Captions
Voltage standard based on Josephson junctions
Summary
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| Description |
English: One-volt en:voltage standard developed by en:NIST (formerly en:National Bureau of Standards (NBS) until 1988) based on an array of 3020 superconducting en:Josephson junctions, operating at liquid-helium temperatures. Microwave energy fed into the finguide structure on the left generates a voltage across the 4 chains of junctions on the right. |
| Date | apparently 1985-1988 |
| Source | NIST paper A Practical Josephson Voltage Standard at One Volt, Figure 1 |
| Author | NBS |
Licensing
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This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:22, 31 March 2017 | | 1,421 × 878 (207 KB) | Materialscientist (talk | contribs) | contrast |
| 06:20, 16 July 2009 |  | 1,421 × 878 (86 KB) | RNLion (talk | contribs) | Higher-resolution view from same NIST source paper to show greater detail. | |
| 13:10, 11 September 2005 |  | 472 × 293 (123 KB) | ArnoldReinhold (talk | contribs) | Superconduction chip used by w:NIST to define the w:volt. The chip contains an array of 3020 w:Josephson junctions and operates at liquid w:Helium temperatures. Microwave energy is fed to the junctions through the finguide on the left. Fr |
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