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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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥41,990,000 (Direct Cost: ¥32,300,000、Indirect Cost: ¥9,690,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2016: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2015: ¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2014: ¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
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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 / 周波数安定度 / 局部発振器 / パルス管冷凍機 / 振動抑制クライオスタット / アラン分散 / 超精密計測 / 制御工学 / 計測工学 |
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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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Report
(5 results)
Research Products
(16 results)
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[Journal Article] Improved frequency measurement of the 1S0-3P0 clock transition in 87Sr using a Cs fountain clock as a transfer oscillator2015
Author(s)
Takehiko Tanabe, Daisuke Akamatsu, Takumi Kobayashi, Akifumi Takamizawa, Shinya Yanagimachi, Takeshi Ikegami, Tomoya Suzuyama, Hajime Inaba, Sho Okubo, Masami Yasuda, Feng-Lei Hong, Atsushi Onae, and Kazumoto Hosaka
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Journal Title
J. Phys. Soc. Jpn.
Volume: 84
Issue: 11
Pages: 115002-115002
DOI
NAID
ISSN
0031-9015, 1347-4073
Related Report
Peer Reviewed / Open Access
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[Presentation] ストロンチウム原子の時計遷移の絶対周波数測定 -SI秒との比較における不確かさの低減-2016
Author(s)
田邊健彦,赤松大輔,小林拓実,高見澤昭文,柳町真也,池上 健,鈴山智也,稲場肇,大久保章,安田正美,洪鋒雷,大苗敦,保坂一元
Organizer
第63回応用物理学会春季学術講演会
Place of Presentation
東工大大岡山キャンパス（東京都目黒区）
Year and Date
2016-03-19
Related Report
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