किपा:NISTvoltChip.jpg

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Summary

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

Public domain
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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Voltage standard based on Josephson junctions

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depicts English

voltage English

media type English

image/jpeg

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Date/TimeThumbnailDimensionsछ्य्‌लामिComment
current११:२२, ३१ मार्च २०१७Thumbnail for version as of ११:२२, ३१ मार्च २०१७१,४२१ × ८७८ (२०७ KB)Materialscientistcontrast
०६:२०, १६ जुलाई २००९Thumbnail for version as of ०६:२०, १६ जुलाई २००९१,४२१ × ८७८ (८६ KB)RNLionHigher-resolution view from same NIST source paper to show greater detail.
१३:१०, ११ सेप्टेम्बर २००५Thumbnail for version as of १३:१०, ११ सेप्टेम्बर २००५४७२ × २९३ (१२३ KB)ArnoldReinholdSuperconduction 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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