原子阱痕量分析中亚稳氩的双色力
Bichromatic force on metastable Argon for Atom Trap Trace Analysis
摘要：
为了有效地进行原子阱痕量分析，对从发散源发射的粒子进行准直是很重要的。它们的高速度限制了与冷却激光的相互作用时间。因此，期望力超过散射力的极限。双色力是一个很有前途的候选人，这是第一次在亚稳态氩-40上证明。在一维中检测预准直的原子，并通过吸收光谱检测获得的多普勒频移。利用实验可获得的参数，可以测量比散射力强三倍的力。系统地研究了它对原子共振的拉比频率、相位差和失谐量的依赖关系，并与光学布洛赫方程的解作了比较。我们预计在氩-39和其他惰性气体实验，其中需要高通量的亚稳原子的原子阱痕量分析中的可能应用的预测。
英文摘要：
For an efficient performance of Atom Trap Trace Analysis, it is important to collimate the particles emitted from an effusive source. Their high velocity limits the interaction time with the cooling laser. Therefore forces beyond the limits of the scattering force are desirable. The bichromatic force is a promising candidate for this purpose which is demonstrated here for the first time on metastable argon-40. The precollimated atoms are detected in one dimension and the acquired Doppler shift is detected by absorption spectroscopy. With the experimentally accessible parameters, it was possible to measure a force three times stronger than the scattering force. Systematic studies on its dependence on Rabi frequency, phase difference and detuning to atomic resonance are comparedto the solution of the optical Bloch equations. We anticipate predictions for a possible application in Atom Trap Trace Analysis of argon-39 and other noble gas experiments, where a high flux of metastable atoms is needed.
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