9th Symposium on Frequency Standards and Metrology

High Temperature Chip Scale Atomic Clock

Not scheduled

20m

Kingscliff, NSW, Australia

Invited Poster Miniature, Portable and Space Systems

Speaker

Lichung Ha (Microchip)

Description

We present the development of alkali-alloy-based vapor cells for operating Chip-Scale Atomic Clocks (CSAC) at ambient temperatures up to 105 °C. Potassium is chosen for a better miscibility as compared with gold for the designed operating temperature. The caesium vapor density is reduced as predicted by the Raoult's law through mixing a controlled amount of potassium metal in the vapor cell. We have demonstrated vapor pressure suppression equivalent to 20 °C. We have measured the collisional broadening due to potassium-caesium collisions and concluded it to be negligible. We will present experimental data demonstrating short- and long-term clock frequency performance as well as temperature sensitivity.

Presentation materials

FSM_rev.pdf