Systems for the radiative trapping of lithium and the tuning of its interactions via magnetic field control
Welford, Christopher John
Hulet, Randall G.
Master of Science
An all diode laser system has been constructed for the confinement of 7 Li in a magneto-optical trap (MOT), which is the first stage in a Bose-Einstein condensate (BEC) experiment. The system is based around an anti-reflection coated broad-area laser which provides the MOT power. The system allows the production of a MOT containing 1.6×10 10 atoms at 600 μK and densities in excess of 2×10 11 atoms/cm 3 . In addition, a magnetic field control system has been implemented using feedback from an Ultrastab 866 current sensor. The system provides a fractional current stability of 1 part in 10 4 —a factor of four improvement over the previous scheme where the current limit of the supply was relied upon for stability.
Electromagnetism; Atoms & subatomic particles; Optics; Pure sciences