Händel S, Marchant A L, Wiles T P, Hopkins S A, Cornish S L
Department of Physics, Durham University, Durham, United Kingdom.
Rev Sci Instrum. 2012 Jan;83(1):013105. doi: 10.1063/1.3676161.
We present an apparatus designed for studies of atom-surface interactions using quantum degenerate gases of (85)Rb and (87)Rb in the vicinity of a room temperature dielectric surface. The surface to be investigated is a super-polished face of a glass Dove prism mounted in a glass cell under ultra-high vacuum. To maintain excellent optical access to the region surrounding the surface, magnetic transport is used to deliver ultracold atoms from a separate vacuum chamber housing the magneto-optical trap (MOT). We present a detailed description of the vacuum apparatus highlighting the novel design features; a low profile MOT chamber and the inclusion of an obstacle in the transport path. We report the characterization and optimization of the magnetic transport around the obstacle, achieving transport efficiencies of 70% with negligible heating. Finally, we demonstrate the loading of a hybrid optical-magnetic trap with (87)Rb and the creation of Bose-Einstein condensates via forced evaporative cooling close to the dielectric surface.
我们展示了一种用于研究原子 - 表面相互作用的装置，该装置使用处于室温电介质表面附近的（85）Rb和（87）Rb量子简并气体。待研究的表面是安装在超高真空玻璃腔中的玻璃道威棱镜的超光滑面。为了保持对表面周围区域的良好光学通路，采用磁传输从容纳磁光阱（MOT）的单独真空腔中输送超冷原子。我们详细描述了真空装置，突出了新颖的设计特点：低剖面的MOT腔以及在传输路径中设置障碍物。我们报告了围绕障碍物的磁传输的特性和优化情况，实现了70%的传输效率且加热可忽略不计。最后，我们展示了用（87）Rb加载混合光磁阱，并通过在电介质表面附近进行强迫蒸发冷却来创建玻色 - 爱因斯坦凝聚体。
