Angular momentum of trapped atomic particles
Abstract
Changes in the angular momentum of particles about the symmetry axis of axially symmetric atomic particle traps caused by laser scattering are discussed. Assuming that ion trapping is accomplished by a combination of RF and Penning traps, relations are derived between the rotational frequency of the ion cloud about particular symmetry axis and the cloud's density, potential, dimensions, and angular momentum. These expressions can be derived to the RF and Penning traps in various limits. Torques applied to the cloud from laser scattering for a particular ion cloud-laser beam interaction geometry are discussed. Background damping is considered. Changes in angular momentum due to trap asymmetries are treated separately for the RF and Penning traps. Angular momentum in neutral particle traps is briefly discussed.
- Publication:
-
Journal of the Optical Society of America B Optical Physics
- Pub Date:
- November 1985
- DOI:
- 10.1364/JOSAB.2.001721
- Bibcode:
- 1985JOSAB...2.1721W
- Keywords:
-
- Angular Momentum;
- Light Scattering;
- Physical Optics;
- Trapped Particles;
- Gas Dynamics;
- Ion Traps (Instrumentation);
- Neutral Particles;
- Penning Effect;
- Radio Frequencies;
- Atomic and Molecular Physics