Measurement of vacuum pressure with a magneto-optical trap : a pressure-rise method
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The lifetime of an atom trap is often limited by the presence of residual background gases in the vacuum chamber. This leads to the lifetime being inversely proportional to the pressure. Here we use this dependence to estimate the pressure and to obtain pressure rate-of-rise curves, which are commonly used in vacuum science to evaluate the performance of a system. We observe different rates of pressure increase in response to different levels of outgassing in our system. Therefore we suggest that this is a sensitive method which will find useful applications in cold atom systems, in particular where the inclusion of a standard vacuum gauge is impractical.
Moore , R , Lee , L , Findlay , E , Torralbo Campo , L , Bruce , G D & Cassettari , D 2015 , ' Measurement of vacuum pressure with a magneto-optical trap : a pressure-rise method ' Review of Scientific Instruments , vol 86 , no. 9 , 093108 . DOI: 10.1063/1.4928154
Review of Scientific Instruments
Copyright 2015 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article has been accepted by Review of Scientific Instruments. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at http://dx.doi.org/10.1063/1.4928154
This research was supported by UK EPSRC grant GR/T08272/01, IOP Scotland and the Leverhulme Trust Research Project Grant RPG-2013-074.