Applied Physics B

, Volume 107, Issue 4, pp 945–954 | Cite as

Heating rates in a thin ion trap for microcavity experiments

  • E. Brama
  • A. Mortensen
  • M. KellerEmail author
  • W. Lange


We have built and characterized a novel linear ion trap. Its small horizontal electrode separation of 250 μm would previously have required microfabrication methods, while our trap was machined conventionally. The thin trap is designed to accommodate a transverse optical cavity of 0.5 mm length, a requirement for cavity-QED experiments with trapped ions in the strong coupling regime. The sandwich structure of the electrodes allows for a very accurate alignment. Employing the Doppler-recooling method, we found that intermittent laser-induced radiation pressure has a significant effect on the ion’s spectrum. This must be taken into account to correctly determine the heating rate of the trap. To this end, we have derived an analytic expression for the spectral line shape of the ion, which includes the effect of natural line broadening, heating as well as radiation pressure. We apply it to determine the accurate heating rate of the system.


Radiation Pressure Fluorescence Level Cooling Laser Compensation Voltage Stray Field 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We gratefully acknowledge support from the European Commission (Marie Curie Excellence Grant MEXT-CT-2005-025703, SCALA network Contract 015714) and the EPSRC (EP/D061296/1).


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.Department of Physics and AstronomyUniversity of SussexBrightonUK

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