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Updated: Oct 31, 2025

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Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
Published on: May 3, 2019
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宇宙に閉じ込められたイオン原子時計の実証
E A Burt1, J D Prestage2, R L Tjoelker2
1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA. eric.a.burt@jpl.nasa.gov.
Nature
|July 1, 2021
まとめ
ナサ
科学分野:
- 原子時計は宇宙航行や 基礎物理学の研究に不可欠です
- 閉じ込められたイオン原子時計の技術は,地上での応用において著しく進歩しました.
- 宇宙での操作は原子時計の性能に問題がある.
背景:
- 原子時計は航海や物理学の正確な計時に不可欠です
- 現在の宇宙原子時計は 厳しい宇宙環境により 限界に直面しています
- 閉じ込められたイオン原子時計は 優れた性能を提供しますが 宇宙に展開するのは困難です
研究 の 目的:
- 宇宙で動作する 原子時計の性能を証明するために
- 先進的な原子時計の実現可能性を 評価するためです
- 宇宙の原子時計の安定性と漂移を評価する
主な方法:
- 捕まったイオン原子時計のデザインを活用し,宇宙の操作に適応しました.
- 深宇宙原子時計の軌道上のテストを 12ヶ月以上行いました
- 測定された短期および長期の周波数安定性および毎日のドリフト.
主要な成果:
- 深宇宙原子時計は23日に 3×10−15の長期安定性を示した.
- 時計は1日あたり3.0〜0.7×10−16の推移を示した.
- 性能は現在の宇宙時計の能力を数倍に上回った.
結論:
- 宇宙に搭載された 原子時計は 驚くべき安定性と 低ドリフトを示しています
- この技術は,宇宙アプリケーションの以前の性能の制約を克服します.
- 信号の遅延時間を現地で測定することで,深空のナビゲーションが強化されます.
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