File:NISTvoltChip.jpg
預覽大小：800 × 494 像素。 其他解析度：320 × 198 像素 | 640 × 395 像素 | 1,024 × 633 像素 | 1,421 × 878 像素。
原始檔案 （1,421 × 878 像素，檔案大小：207 KB，MIME 類型：image/jpeg）
摘要
| 描述 |
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. |
| 日期 | apparently 1985-1988 |
| 來源 | NIST paper A Practical Josephson Voltage Standard at One Volt, Figure 1 |
| 作者 | NBS |
授權條款
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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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檔案歷史
點選某个日期/時間檢視對應時刻的檔案。
| 日期/時間 | 縮圖 | 大小 | 使用者 | 備註 | |
|---|---|---|---|---|---|
| 目前 | 2017年3月31日 (五) 11:22 | | 1,421 × 878（207 KB） | Materialscientist | contrast |
| 2009年7月16日 (四) 06:20 |  | 1,421 × 878（86 KB） | RNLion | Higher-resolution view from same NIST source paper to show greater detail. | |
| 2005年9月11日 (日) 13:10 |  | 472 × 293（123 KB） | ArnoldReinhold | 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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