Compact Radio-Frequency Resonator For Cryogenic Ion Traps

We report on the investigation and implementation of a lumped-component, radio-frequency resonator used in a cryogenic vacuum environment to drive an ion trap. The resonator was required to achieve the voltages necessary to trap (similar to 100 V), while dissipating very little power. Ultimately, for an input voltage of 1.35 V, a voltage gain of 100 was measured at 5.7 K, using a design which dissipated only 18 mW. The resonator operated at a frequency of 7.64 MHz and had a Q of 700. Single Ca-40(+) ions were confined in a trap driven by this device, providing proof of successful resonator operation at low temperature. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4737889]