2017 Fiscal Year Final Research Report
Development of an all cryogenic ultra-stable microwave oscillator
| Project/Area Number |
26246038
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General applied physics
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
Ikegami Takeshi 国立研究開発法人産業技術総合研究所, 計量標準総合センター, 上級主任研究員 (60356417)
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| Co-Investigator(Kenkyū-buntansha) |
渡部 謙一 国立研究開発法人産業技術総合研究所, 計量標準総合センター, 主任研究員 (50358389)
柳町 真也 国立研究開発法人産業技術総合研究所, 計量標準総合センター, 主任研究員 (70358216)
高見澤 昭文 国立研究開発法人産業技術総合研究所, 計量標準総合センター, 主任研究員 (50462833)
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| Research Collaborator |
HARTNETT John 豪州アデレード大学
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| Project Period (FY) |
2014-06-27 – 2018-03-31
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| Keywords | 低温サファイア発振器 / マイクロ波発振器 / セシウム一次周波数標準器 / 原子時計 |
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| Outline of Final Research Achievements |
Three sets of cryogenic sapphire-resonator oscillators (CSOs), have been developed to operate using cryo-refrigerators and low-vibration cryostats. The Allan deviation was evaluated through the three-cornered hat method, and was better than 2×10-15 for averaging times of 1 s to 1 day. Autonomous and continuous operation over a year without any frequency unlocking became possible. The first CSO is now used with our cesium atomic fountain frequency standard, which has achieved a nearly quantum-projection-noise-limited frequency stability of 8×10-14 at 1 second.
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| Free Research Field |
一次周波数標準器とその周辺技術の開発
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