Drifts and Environmental Disturbances in Atomic Clock Subsystems: Quantifying Local Oscillator, Control Loop, and Ion...

Area of Science:

• Atomic, Molecular, and Optical (AMO) Physics
• Metrology and Precision Measurement
• Control Systems Engineering

Background:

• Linear ion trap frequency standards represent state-of-the-art atomic clocks, crucial for precise timekeeping.
• Their stability is influenced by local oscillators, environmental factors, and control loop dynamics.
• Deploying these standards in non-laboratory settings necessitates understanding disturbance impacts.

Purpose of the Study:

• To analyze the impact of environmental perturbations on linear ion trap frequency standards.
• To develop and validate a computational model for the control loop that locks microwave sources to ion resonance.
• To assess the effectiveness of feedback mechanisms in mitigating disturbances.

Main Methods:

• Analysis of environmental disturbance impacts across different timescales.
• Development of a computational model for the feedback control loop.
• Comparison of model predictions with laboratory measurements and analytical approaches.

Main Results:

• Identification of key perturbations affecting clock stability.
• Validation of the computational model against experimental data, demonstrating its accuracy in predicting disturbance mitigation.
• Confirmation of the model's agreement with an developed analytic prediction method.

Conclusions:

• The developed computational model accurately predicts the performance of control loops in mitigating environmental disturbances for ion trap frequency standards.
• This work provides a framework for understanding and improving the robustness of high-stability clocks for field and space applications.
• Further research can leverage this model for designing more resilient frequency standards.