Optimization of the current extracted from an ultracold ion source. Debernardi, N., Vliembergen, van, R.&nbsp;W.<nbsp>L., Engelen, W.&nbsp;J., Hermans, K.&nbsp;H.<nbsp>M., Reijnders, M.&nbsp;P., Geer, van der, S.&nbsp;B., Mutsaers, P.&nbsp;H.<nbsp>A., Luiten, O.&nbsp;J., & Vredenbregt, E.&nbsp;J.<nbsp>D. New Journal of Physics, 14(8):083011, August, 2012.
Optimization of the current extracted from an ultracold ion source [link]Paper  doi  abstract   bibtex   
Photoionization of trapped atoms is a recent technique for creating ion beams with low transverse temperature. The temporal behavior of the current that can be extracted from such an ultracold ion source is measured when operating in the pulsed mode. A number of experimental parameters are varied to find the conditions under which the time-averaged current is maximized. A dynamic model of the source is developed that agrees quite well with the experimental observations. The radiation pressure exerted by the excitation laser beam is found to substantially increase the extracted current. For a source volume with a typical root-mean-square radius of 20??m, a maximum peak current of 88?pA is observed, limited by the available ionization laser power of 46?mW. The optimum time-averaged current is 13?pA at a 36% duty cycle. Particle-tracking simulations show that stochastic heating strongly reduces the brightness of the ion beam at higher current for the experimental conditions.
@article{ debernardi_optimization_2012,
  title = {Optimization of the current extracted from an ultracold ion source},
  volume = {14},
  issn = {1367-2630},
  url = {http://iopscience.iop.org/1367-2630/14/8/083011},
  doi = {10.1088/1367-2630/14/8/083011},
  abstract = {Photoionization of trapped atoms is a recent technique for creating ion beams with low transverse temperature. The temporal behavior of the current that can be extracted from such an ultracold ion source is measured when operating in the pulsed mode. A number of experimental parameters are varied to find the conditions under which the time-averaged current is maximized. A dynamic model of the source is developed that agrees quite well with the experimental observations. The radiation pressure exerted by the excitation laser beam is found to substantially increase the extracted current. For a source volume with a typical root-mean-square radius of 20??m, a maximum peak current of 88?{pA} is observed, limited by the available ionization laser power of 46?{mW}. The optimum time-averaged current is 13?{pA} at a 36% duty cycle. Particle-tracking simulations show that stochastic heating strongly reduces the brightness of the ion beam at higher current for the experimental conditions.},
  language = {en},
  number = {8},
  urldate = {2014-04-01TZ},
  journal = {New Journal of Physics},
  author = {Debernardi, N. and Vliembergen, R. W. L. van and Engelen, W. J. and Hermans, K. H. M. and Reijnders, M. P. and Geer, S. B. van der and Mutsaers, P. H. A. and Luiten, O. J. and Vredenbregt, E. J. D.},
  month = {August},
  year = {2012},
  pages = {083011}
}

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