Electron and recoil ion momentum imaging with a magneto-optically trapped target
Electron and recoil ion momentum imaging with a magneto-optically trapped target
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DOI：
10.1063/1.4914040
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发表时间：
2015-03-01
影响因子：
1.6
通讯作者：
Fischer, D.
中科院分区：
文献类型：
--
作者：
Hubele, R.;Schuricke, M.;Fischer, D.
将反应显微镜(REMI)与磁光陷井(MOT)相结合，对原子分裂过程进行了完整的运动学研究。利用这种新型的MOTReMi装置，在全固态角度下，测量了激光冷却和状态制备的锂原子碎片的动量矢量。由于对当前设置的优化设计、MOT的非标准操作以及采用交替测量和捕获周期的开关周期，可以实现第一个成功的MOTReMi。MOT中非常低的目标温度(类似于2MK)允许极好的动量分辨率。用光学方法制备了Li2(2)P(3/2)激发态的靶原子，获得了接近100%的原子极化。虽然最初的实验结果是在较早的时候报道的，但在这项工作中，我们重点介绍了该装置的技术描述及其在涉及266 nm激光脉冲中的目标电离和与投射离子碰撞的调试实验中的性能。(C)2015 AIP出版有限责任公司。
A reaction microscope (ReMi) has been combined with a magneto-optical trap (MOT) for the kinematically complete investigation of atomic break-up processes. With the novel MOTReMi apparatus, the momentum vectors of the fragments of laser-cooled and state-prepared lithium atoms are measured in coincidence and over the full solid angle. The first successful implementation of a MOTReMi could be realized due to an optimized design of the present setup, a nonstandard operation of the MOT, and by employing a switching cycle with alternating measuring and trapping periods. The very low target temperature in the MOT (similar to 2 mK) allows for an excellent momentum resolution. Optical preparation of the target atoms in the excited Li 2(2)P(3/2) state was demonstrated providing an atomic polarization of close to 100%. While first experimental results were reported earlier, in this work, we focus on the technical description of the setup and its performance in commissioning experiments involving target ionization in 266 nm laser pulses and in collisions with projectile ions. (C) 2015 AIP Publishing LLC.