| Project/Area Number |
15K05238
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
Yasuda Masami 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, 研究グループ長 (50322045)
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| Co-Investigator(Kenkyū-buntansha) |
赤松 大輔 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 (90549883)
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| Research Collaborator |
HATAKEYAMA Atsushi 東京農工大学, 大学院工学研究院, 教授
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 光格子時計 / 酸化イッテルビウム / 光還元反応 / 低速原子線 / 磁気光学トラップ / 可搬型光格子時計 / 小型・可搬化 / 光誘起原子脱離 / 光還元 / 量子エレクトロニクス / 低速原子線源 |
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| Outline of Final Research Achievements |
Transportability of the clock is indispensable for the redefinition of the SI (Systeme International) second and a full-fledged social implementation of optical lattice clocks. In this research, we have developed a light-controlled cold ytterbium (Yb) atomic beam source aiming for a transportable optical lattice clock. At first, we tried to utilize light-induced atom desorption for generating slow Yb atomic beam. But after detailed investigation using techniques such as X-ray photoelectron spectroscopy (XPS), we discovered that the deposited Yb metals were quickly oxidized even under the ultra-high vacuum condition. Therefore, we irradiated a relatively high-powered ultraviolet laser beam onto the ytterbium oxide sample to induce reduction process. As a result, we succeeded in trapping generated slow Yb atomic vapors by a magneto-optical trap for the first time.
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