A general cold atomic and molecular beam source
نویسندگان
چکیده
We demonstrate and characterize a high-flux beam source for cold, slow atoms or molecules. The desired species is vaporized using laser ablation, then cooled by thermalization in a cryogenic cell of buffer gas. The beam is formed by particles exiting a hole in the buffer gas cell. We characterize the properties of the beam (flux, forward velocity, temperature) for both an atom (Na) and a molecule (PbO) under varying buffer gas density, and discuss conditions for optimizing these beam parameters. Our source compares favorably to existing techniques of beam formation, for a variety of applications.
منابع مشابه
Intense atomic and molecular beams via neon buffer-gas cooling
We realize a continuous, intense, cold molecular and atomic beam source based on buffer-gas cooling. Hot vapor (up to 600K) from an oven is mixed with cold (15K) neon buffer gas, and then emitted into a high-flux beam. The novel use of cold neon as a buffer gas produces a forward velocity distribution and low-energy tail that is comparable to much colder helium-based sources. We expect this sou...
متن کاملA Bright , Guided Molecular Beam With Hydrodynamic Enhancement
The study of cold gas-phase molecules is a major thrust of modern chemical and atomic physics[1]. In particular, inelastic collisions of cold molecules have recently attracted widespread theoretical and experimental interest. These collisions are a window into the internal structure and dynamics of molecular interactions as well as being the expected fundamental limiting process for collisional...
متن کاملCharacterization of SnTe-doped InP grown by solid-source atomic layer molecular beam epitaxy
SnTe-doped InP layers were grown at low temperature by solid-source atomic layer molecular beam epitaxy. The samples were characterized by Hall measurements versus temperature, low temperature photoluminescence, x-ray diffraction, and secondary ion mass spectroscopy. The temperature of the SnTe effusion cell was varied from 320 to 440 °C, and the free electron concentration measured at room tem...
متن کاملBright, guided molecular beam with hydrodynamic enhancement.
The authors realize a novel high flux source of cold atoms and molecules employing hydrodynamic enhancement of an effusive aperture at cryogenic temperatures. Molecular oxygen from the source is coupled to a magnetic guide, delivering a cold, continuous, guided flux of 3 x 10(12) O(2) s(-1). The dynamics of the source are studied by creating and spectroscopically analyzing high flux beams of at...
متن کاملHigh flux source of cold rubidium atoms
We report on the production of a continuous, slow, and cold beam of Rb atoms with an extremely high flux of 3.2 1012 atoms/s, a transverse temperature of 3 mK, and a longitudinal temperature of 90 mK. We describe the apparatus created to generate the atom beam. Hot atoms are emitted from a rubidium candlestick atomic beam source and transversely cooled and collimated by a 20 cm long atomic coll...
متن کامل