Authors: J. Bürgi, R. Neuenschwander, G. Kellermann, J. García Molleja, A.F. Craievich, and J. Feugeas.
Review of Scientific Instruments 84, 015102 (2013) 5pp. (January 2nd 2013)
Because American Institute of Physics copyright policy onle first page is shown. Available at: http://dx.doi.org/10.1063/1.4773002