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一、引言从原子氢脲泽的工作原理看来,很明显,它的性能可以通过增加进入贮存泡的处于(F=1,m=0)态的达部分氢原子来得到显著的改进。在一般的脉泽设计中,进入贮存泡的原子束主要包括所需的(F=1m=0)能态和(F=1,m=1)能态的混合物。后一种能态实际上对脉泽振荡是无用的,相反由于与提供脉泽输出信号的辐射原子问的自旋交换碰撞会使谱线展宽。从而使脉泽性
I. INTRODUCTION From the working principle of atomic hydrogen-urea-urea it seems clear that its performance can be significantly improved by increasing the fraction of hydrogen atoms entering the storage bubble (F = 1, m = 0). In a typical pulse design, the atomic beam entering the storage bubble consists essentially of the desired (F = 1m = 0) energy state and the (F = 1, m = 1) energy state mixture. The latter state is practically useless to the maser oscillation, but rather broadens the spectrum due to the spin exchange collision with the radiation atom providing the maser output signal. So that maser sex