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Sisyphus cooling in a continuously loaded trap




We demonstrate continuous Sisyphus cooling combined with a continuous loading mechanism used to efficiently slow down and accumulate chromium atoms from a guided beam. While the loading itself is based on a single slowing step, applying a radio frequency field forces the atoms to repeat this step many times resulting in a so-called Sisyphus cooling. This extension allows efficient loading and cooling of atoms from a wide range of initial beam conditions. We study the interplay of the continuous loading and simultaneous Sisyphus cooling in different density regimes. In the case of a low density flux we observe a differential gain in phase-space density of nine orders of magnitude. This makes the presented scheme an ideal tool for reaching collisional densities enabling evaporative cooling—in spite of unfavourable initial conditions.

Author(s): Valentin Volchkov and Jahn Rührig and Tilman Pfau and Axel Griesmaier
Journal: New Journal of Physics
Volume: 15
Pages: 093012
Year: 2013
Month: September
Day: 10
Publisher: IOP Publishing and Deutsche Physikalische Gesellschaft

Department(s): Optics & Sensing Laboratory
Bibtex Type: Article (article)
Paper Type: Journal

DOI: 10.1088/1367-2630/15/9/093012
State: Published


  title = {Sisyphus cooling in a continuously loaded trap},
  author = {Volchkov, Valentin and R{\"u}hrig, Jahn and Pfau, Tilman and Griesmaier, Axel},
  journal = { New Journal of Physics},
  volume = {15},
  pages = {093012},
  publisher = { IOP Publishing and Deutsche Physikalische Gesellschaft},
  month = sep,
  year = {2013},
  month_numeric = {9}