Simulation of Cryogenic Buffer Gas Beams

Abstract

The cryogenic buffer gas beam (CBGB) is an important tool in the study of cold and ultracold molecules. While there are known techniques to enhance desired beam properties, such as high flux, low velocity, or reduced divergence, they have generally not undergone detailed numerical optimization. Numerical simulation of buffer gas beams is challenging, as the relevant dynamics occur in regions where the density varies by orders of magnitude, rendering standard numerical methods unreliable or intractable. Here, we present a hybrid approach to simulating CBGBs that combines gas dynamics methods with particle tracing. The simulations capture important properties such as velocities and divergence across an assortment of designs, including two-stage slowing cells and de Laval nozzles. This approach should therefore be a useful tool for optimizing CBGB designs across a wide range of applications.

References in corpus (12)

• A High Phase-Space-Density Gas of Polar Molecules
• Cold molecules: Progress in Quantum Engineering of Chemistry and Quantum Matter
• Radio Frequency Magneto-Optical Trapping of CaF with High Density
• Sisyphus Cooling of Electrically Trapped Polyatomic Molecules
• Stopping supersonic oxygen with a series of pulsed electromagnetic coils: A molecular coilgun
• Ultracold Rb-OH collisions and prospects for sympathetic cooling
• Laser cooling of molecules
• Electrostatic extraction of cold molecules from a cryogenic reservoir
• Precision measurements with polar molecules: the role of the black body radiation
• Sympathetic cooling of polyatomic molecules with S-state atoms in a magnetic trap
• High Sensitivity Microwave Spectroscopy in a Cryogenic Buffer Gas Cell
• Controlling Spin-flips of Molecules in an Electromagnetic Trap

Cited by in corpus (2)

• Quantum control of molecules for fundamental physics
• Optimizing Pulsed-Laser Ablation Production of AlCl Molecules for Laser Cooling