A Bright, Slow Cryogenic Molecular Beam Source for Free Radicals

Details A Bright, Slow Cryogenic Molecular Beam Source for Free Radicals A Bright, Slow Cryogenic Molecular Beam Source for Free Radicals

2011-01-21

arxiv.org/abs/1101.4229v1

Physics

Atomic Physics

15 pages, 14 figures

Scientific paper

We demonstrate and characterize a cryogenic buffer gas-cooled molecular beam source capable of producing bright beams of free radicals and refractory species. Details of the beam properties (brightness, forward velocity distribution, transverse velocity spread, rotational and vibrational temperatures) are measured under varying conditions for the molecular species SrF. Under typical conditions we produce a beam of brightness 1.2 x 10^11 molecules/sr/pulse in the rovibrational ground state, with 140 m/s forward velocity and a rotational temperature of approximately 1 K. This source compares favorably to other methods for producing beams of free radicals and refractory species for many types of experiments. We provide details of construction that may be helpful for others attempting to use this method.

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