Development of a space cold atom clock.

Area of Science:

• Atomic, Molecular, and Optical Physics
• Astrophysics and Space Science
• Metrology and Measurement Science

Background:

• Cold atom clocks are crucial for fundamental physics and primary frequency standards.
• Space-based operation of these clocks enables advanced exploration of topics like dark matter and general relativity.

Purpose of the Study:

• To detail the development and in-orbit performance of a Space Cold Atom Clock (SCAC).
• To assess the feasibility of long-term, continuous operation of atomic clocks in space.

Main Methods:

• Development and launch of the SCAC aboard the Space Lab TG-2 in 2016.
• Continuous in-orbit operation and monitoring for approximately three years (2016-2019).
• Conducting scientific experiments and engineering tests during the mission.

Main Results:

• The SCAC operated continuously in orbit for nearly three years before deorbiting with TG-2.
• The mission provided valuable data on the performance and reliability of cold atom clocks in a space environment.
• Numerous scientific experiments and engineering tests were successfully executed.

Conclusions:

• The SCAC's successful long-duration mission validates its potential for space-based fundamental physics research.
• The results provide a foundation for developing future space-borne time-frequency systems for deep space applications.
• This work highlights the viability of advanced atomic clock technology for extraterrestrial scientific exploration.