Paul阱中的缓冲气体冷却  

COOLING BY BUFFER GAS IN A Paul TRAP

作　　者：张志飞[1] 高克林[1] 罗学立[1] 陈永泰[1] 蒋玉蓉[1] 

机构地区：[1]中科院武汉物理与数学研究所波谱与原子分子物理国家重点实验室

出　　处：《原子与分子物理学报》1998年第3期323-328,共6页Journal of Atomic and Molecular Physics

基　　金：科学院和国家自然科学基金

摘　　要：缓冲气体冷却是高分子冷却的方法之一。通过射频共振吸收检测测量分别在充氦和不充氦的情况下不同衰减时间的共振吸收曲线，发现充入缓冲气体Ｈｅ后，阱中的离子数目、离子寿命以及离子共振吸收信号的信噪比都大为提高。ollision between the ions and the buffer gas molecules light compared to the mass of the stored ions tend to cool the ions. The amount of energy reduction is determined by the gas temperature and pressure and, in the case of a rf trap, by heating processes due to ionion collisions and perturbations in the applied potential since the ions temperature may be thought as an equilibrium between rf heating effects and cooling by the collisions with buffer gas. As we expected, with a Hebuffer gas pressure of about 3.0×10-4 Pa in our experiment, the storage time increases 131%, and after one seconds decay, the stored ion number increases 44.3% and the noise of the signal decreases 55.4%.

关 键 词：离子阱 缓冲气体 冷却 离子冷却 

分 类 号：O56[理学—原子与分子物理]