Triplet ( S = 1) He Rydberg atoms in supersonic beams with an initial velocity of 350 m s −1 have been decelerated to zero velocity and loaded into an off-axis electric trap in the presence and absence of magnetic fields. Comparing the deceleration efficiencies and the radiative decay of the population of trapped He Rydberg atoms to the (1s) 1 (2s) 1 3 S 1 metastable level in the two sets of deceleration and trapping experiments revealed that the effects of magnetic fields up to 30 mT are negligible provided that a background dc electric field is maintained in the decelerator. A magnetic quadrupole trap of 30 mT depth corresponds to a He temperature of about 40 mK. The results thus represent an important step towards achieving high densities of cold paramagnetic samples following successive cycles of Rydberg–Stark deceleration, trapping, and radiative decay in overlaid electric and magnetic traps.

中文翻译：

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Rydberg–Stark磁场中氦的减速和捕获

超声束中具有350 ms -1初始速度的三重态（S = 1）He Rydberg原子已减速至零速度，并在存在和不存在磁场的情况下加载到离轴电阱中。在两组减速和俘获实验中，比较捕获的He Rydberg原子的种群的减速效率和辐射衰减与（1s）1（2s）1 3 S 1亚稳态能级，发现磁场的影响高达30只要在减速器中保持背景直流电场，mT可以忽略不计。深度为30 mT的磁性四极阱对应的He温度约为40 mK。因此，这些结果代表了继Rydberg–Stark减速，陷波，