S. A. Rangwala

Continuous source of translationally cold dipolar molecules

The Stark interaction of polar molecules with an inhomogeneous electric field is exploited to select slow molecules from a room-temperature reservoir and guide them into an ultrahigh vacuum chamber. A linear electrostatic quadrupole with a curved section selects molecules with small transverse and longitudinal velocities. The source is tested with formaldehyde

Two-dimensional trapping of dipolar molecules in time-varying electric fields

({\mathrm{H}}_{2}\mathrm{CO})

Cooling and stabilization by collisions in a mixed ion-atom system.

and deuterated ammonia

Investigation of anti-Relaxation coatings for alkali-metal vapor cells using surface science techniques

({\mathrm{ND}}_{3}).

Cross sections for the dissociative electron attachment to ozone

With

Absolute cross sections for dissociative electron attachment to NF3

{\mathrm{H}}_{2}\mathrm{CO}

Water vapor at a translational temperature of 1 K

a continuous flux is measured of

Trapping of neutral rubidium with a macroscopic three-phase electric trap.

\ensuremath{\approx}{10}^{9}/\mathrm{s}

Combined ion and atom trap for low-temperature ion–atom physics

and a longitudinal temperature of a few kelvin. The data are compared with the result of a Monte Carlo simulation.

Electric-field-induced change of the alkali-metal vapor density in paraffin-coated cells

Simultaneous two-dimensional trapping of neutral dipolar molecules in low- and high-field seeking states is analyzed. A trapping potential of the order of 20 mK can be produced for molecules such as ND3 with time-dependent electric fields. The analysis is in agreement with an experiment where slow molecules with longitudinal velocities of the order of 20 m/s are guided between four 50 cm long rods driven by an alternating electric potential at a frequency of a few kHz.