Cavity design and optimization for a passive hydrogen maser
被动型氢脉泽微波腔优化仿真设计

According to the theory of electromagnetism, we establish the equation of resonance frequency for simplified model of cavity of passive hydrogen maser. We find the optimal dimension of the cavity, which makes the product of the Q value and the filling factor reach a maximal value. The experimental results indicate that the so designed cavity can be utilized undoubtedly for the passive hydrogen maser, and achieve the Q value of 9800 and the filling factor of 1.2. Furthermore, the resulting capacity of storage volume is the biggest is ever reported cavities of passive hydrogen maser.