RF spectroscopy in a resonant RF-dressed trap

Kosterlitz-Thouless Transition in RF Dressed Ultra-Cold Gases

Very low temperature dilute trapped atomic gases form a well known state, the Bose-Einstein condensate (BEC). Recent work has made it possible to adiabatically transfer condensates from 3 dimensional traps into RF dressed traps that hold the atoms in a small region around a specific magnetic field. For a quadrupole magnetic trap, this results in an ”eggshell” potential, where atoms’ movement is...

Longitudinal character of atom-chip-based rf-dressed potentials

We experimentally investigate the properties of radio-frequency-dressed potentials for Bose-Einstein condensates on atom chips. The three-dimensional potential forms a connected pair of parallel waveguides. We show that rf-dressed potentials are robust against the effect of small magnetic-field variations on the trap potential. Long-lived dipole oscillations of condensates induced in the rf-dre...

Improvement in 3d Computation of Rf-losses in Resonant Cavities

In 1997, a cold model of a so-called optimized proton accelerating structure was measured. It turned out that predictions of RF losses in the region of coupling holes had been dramatically under-estimated by the simulation codes. Since that time, a study made on the IPHI RFQ [1] pumping slots showed that the problem occurred when a surface current line runs along a sharp reentrant corner. This ...

Precise characterization of 6Li Feshbach resonances using trap-sideband-resolved RF spectroscopy of weakly bound molecules.

We perform radio-frequency dissociation spectroscopy of weakly bound 6Li2 Feshbach molecules using low-density samples of about 30 molecules in an optical dipole trap. Combined with a high magnetic field stability, this allows us to resolve the discrete trap levels in the radio-frequency dissociation spectra. This novel technique allows the binding energy of Feshbach molecules to be determined ...

RF - Induced Transport of Resonant Minority Species in ICRF - Heated