2019/10/30 by Alexander Golombek, Golombek, Alexander, Lisa Danzig +3
Engineering · Physics and Astronomy · #Applied Physics (physics.app-ph) #Atomic and Molecular Physics #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Laser-induced spectroscopy and plasma
paper · pdf · doi:10.48550/arxiv.1910.13950
openalex publication_date 2019/10/30 · openalex created_date 2022/07/19 · openalex updated_date 2026/07/28
We describe the characterization of a pulsed supersonic rare gas beam which\nis intended to serve as an ultracold neutral atom target for the production of\nan ultrashort ion pulse via femtosecond photoionization. The velocity\ndistribution of atoms entrained in the beam is measured and characterized by\ntemperatures T_\∥ and T_\⊥ in directions along and perpendicular\nto the beam propagation, respectively. It is shown that T_\⊥ values in the\nmK regime are achieved at distances of the order of 1000 mm from the nozzle.\nMoreover, the center beam density at this position is measured to be of the\norder of 1011 atoms/cm3. Both findings are essential for the intended\napplication and confirm the targeted beam specifications. Comparison with\ntheoretical estimates reveals the well-known skimmer interference effect, which\nis found to reduce the beam density by more than one order of magnitude.\n