Static trapping of polar molecules in a traveling wave decelerator

Abstract

We present experiments on decelerating and trapping ammonia molecules using a combination of a Stark decelerator and a traveling wave decelerator. In the traveling wave decelerator a moving potential is created by a series of ring-shaped electrodes to which oscillating high voltages are applied. By lowering the frequency of the applied voltages, the molecules confined in the moving trap are decelerated and brought to a standstill. As the molecules are confined in a true 3D well, this new kind of deceleration has practically no losses, resulting in a great improvement on the usual Stark deceleration techniques. The necessary voltages are generated by amplifying the output of an arbitrary wave generator using fast HV-amplifiers, giving us great control over the trapped molecules. We illustrate this by experiments in which we adiabatically cool trapped NH3 and ND3 molecules and resonantly excite their motion.

References in corpus (11)

• Cold and Ultracold Molecules: Science, Technology, and Applications
• Sisyphus Cooling of Electrically Trapped Polyatomic Molecules
• Evaporative cooling of the dipolar radical OH
• Magneto-electrostatic trapping of ground state OH molecules
• Deceleration of neutral molecules in macroscopic traveling traps
• Trapping molecules on a chip in traveling potential wells
• Traveling wave deceleration of heavy polar molecules in low-field seeking states
• A traveling wave decelerator for neutral polar molecules
• Deceleration and trapping of heavy diatomic molecules using a ring-decelerator
• Loading Stark-decelerated molecules into electrostatic quadrupole traps
• Velocity map imaging of a slow beam of ammonia molecules inside a quadrupole guide

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• Preparation of an ultra-cold sample of ammonia molecules for precision measurements
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