Blieck J, Fléchard X, Cassimi A, Gilles H, Girard S, Hennecart D
LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, Caen 14050, France.
Rev Sci Instrum. 2008 Oct;79(10):103102. doi: 10.1063/1.2994151.
A new magneto-optical trap-target recoil ion momentum spectroscopy apparatus has been built and tested at the LPC-CAEN. Dedicated to ion-atom collisions studies and excited fraction measurements, the setup combines a projectile ion beam line, a target of cold rubidium atoms provided by a magneto-optical trap (MOT), and a recoil ion momentum spectrometer. In a test experiment using a beam of Na(+) projectiles, we demonstrate its capability to measure, with a very high signal over background ratio, fully differential cross sections in scattering angle, initial state, and final state of the system. We detail, in this work, features that had not been described previously in the literature: an extraction of the recoil ions transverse to the ion beam axis, and a fast switch for the MOT magnetic field. Advantages of transverse versus longitudinal extraction are discussed, and future possibilities for the setup are presented.
一种新型的磁光阱 - 靶反冲离子动量谱仪装置已在LPC - CAEN建成并进行了测试。该装置专门用于离子 - 原子碰撞研究和激发分数测量，它结合了一个弹丸离子束线、一个由磁光阱（MOT）提供的冷铷原子靶以及一个反冲离子动量谱仪。在一个使用Na(+)弹丸束的测试实验中，我们展示了它能够以非常高的信背比测量系统散射角、初始态和末态的全微分截面。在这项工作中，我们详细介绍了文献中先前未描述的特征：垂直于离子束轴提取反冲离子以及MOT磁场的快速切换。讨论了横向提取与纵向提取的优点，并介绍了该装置未来的可能性。
