An Intense, Continuous Cold Atom Source

Abstract

We demonstrate an intense, continuous cold atom beam generated via post nozzle seeding of a supersonic helium jet with ${}^7$Li atoms. The nozzle is cooled to about 4.4 K to reduce the forward velocity of the atoms. The atomic beam is brought to a focus 175 cm from the nozzle by a 10 cm bore diameter magnetic hexapole lens. Absorption and fluorescence imaging of the focus show a flux of $2.3(4)\times 10^{12}$ atoms/s, brightness of $4.1(7)\times 10^{19}$ ${\text{m}}^{-2}{\text{s}}^{-1}{\text{sr}}^{-1}$, forward velocity of 211(2) m/s, and longitudinal temperature of 7(3) mK. Results agree with a Monte Carlo simulation of the seeding dynamics and a particle tracing simulation of the atom lens. We project that 10 times higher flux would be possible with improved vacuum system design. Our method should provide a useful high-brightness source for atom-optical and other atomic and molecular physics applications.

References in corpus (6)

• The Buffer Gas Beam: An Intense, Cold, and Slow Source for Atoms and Molecules
• Testing gravity with cold atom interferometry: Results and prospects
• Parity and Time-Reversal Violation in Atomic Systems
• A High Flux Source of Cold Rubidium
• Evaporative Cooling of a Guided Rubidium Atomic Beam
• A high-flux, adjustable, compact cold-atom source

Cited by in corpus (1)

• Continuous cavity-QED with an atomic beam