Motional sideband spectra and Coulomb crystals in a Penning trap

19 06/2013

Wednesday, 19 Jun. 2013, 14:30 - 15:30

Presenter: Sandeep Mavadia, Imperial College, London
Host: Dr. Alipasha Vaziri
Where: Seminarraum 3, 3rd Floor, Strudlhofgasse 4, 1090 Vienna

Ion traps can be used to isolate small numbers of atoms from the environment. Hence, they are good tool for experimenting on quantum systems in the absence of decoherence. So far, most of the work on small numbers of ions has been done in linear RF-traps. In this talk I will describe the work at Imperial College London using a Penning trap which allows single ions or Coulomb crystals to be trapped without any micromotion. I will show results from recent narrow-linewidth spectroscopy experiments which we use to measure the temperature of the different modes of a single ion including the low-frequency negative energy magnetron mode. We have also imaged Coulomb crystals in different configurations and I compare these photos to computer simulations to determine quantitative information about the motion of the ions.