Hubele R, Schuricke M, Goullon J, Lindenblatt H, Ferreira N, Laforge A, Brühl E, de Jesus V L B, Globig D, Kelkar A, Misra D, Schneider K, Schulz M, Sell M, Song Z, Wang X, Zhang S, Fischer D
Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Rua Lucio Tavares 1045, 26530-060 Nilópolis, Rio de Janeiro, Brazil.
Rev Sci Instrum. 2015 Mar;86(3):033105. doi: 10.1063/1.4914040.
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 (∼2 mK) allows for an excellent momentum resolution. Optical preparation of the target atoms in the excited Li 2(2)P3/2 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.
反应显微镜（ReMi）已与磁光阱（MOT）相结合，用于对原子分裂过程进行运动学上完整的研究。利用新型的MOTReMi装置，可以在全立体角范围内同时测量激光冷却并经过态制备的锂原子碎片的动量矢量。由于当前装置的优化设计、磁光阱的非标准操作以及采用了具有交替测量和俘获周期的切换循环，首次成功实现了MOTReMi。磁光阱中极低的靶温度（约2 mK）使得具有出色的动量分辨率。已证明可对靶原子进行光学制备，使其处于激发态Li 2(2)P3/2，原子极化率接近100%。虽然早期已报道了初步实验结果，但在本工作中，我们重点关注该装置的技术描述及其在涉及266 nm激光脉冲中靶电离以及与入射离子碰撞的调试实验中的性能。
