File:18pml015 clock-chip-with-coffee-bean 2mb.jpg
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Summary
| Description |
English: The vapor cell of a chip scale rubidium atomic clock developed by the US NIST in 2019, shown next to a coffee bean for scale. This is the next generation version of the first chip scale atomic clock (CSAC), a caesium chip developed at NIST in 2011. The clock is based on an atomic transition of rubidium atoms vibrating at an optical frequency of 384.6 THz absorbing infrared light at 780 nm wavelength The higher optical frequency enables the clock to have an accuracy of 1.7 x 10-13 about 100 times higher than the first chip scale atomic clock which used a caesium transition of 9 GHz in the microwave range. (Source: NIST Team Demonstrates Heart of Next-Generation Chip-Scale Atomic Clock, 17 May 2019, NIST website) |
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| Source | https://www.nist.gov/image/18pml015clock-chip-coffee-bean2mbjpg |
| Author | Hummon/NIST |
Licensing
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:18, 21 June 2022 | | 1,481 × 1,204 (116 KB) | WalkingRadiance | Uploaded a work by Hummon/NIST from https://www.nist.gov/image/18pml015clock-chip-coffee-bean2mbjpg with UploadWizard |
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