A bright, slow cryogenic molecular beam source for free radicals.

  title={A bright, slow cryogenic molecular beam source for free radicals.},
  author={John F. Barry and Edward Shuman and David DeMille},
  journal={Physical chemistry chemical physics : PCCP},
  volume={13 42},
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 × 10(11) molecules/sr/pulse in the X(2)Σ(+)(v = 0, N(rot) = 0… 

Bright, continuous beams of cold free radicals

We demonstrate a cryogenic buffer gas-cooled molecular beam source capable of producing bright, continuous beams of cold and slow free radicals via laser ablation over durations of up to 60~seconds.

Optical cycling of AlF molecules

Aluminium monofluoride (AlF) is a promising candidate for laser cooling and trapping at high densities. We show efficient production of AlF in a bright, pulsed cryogenic buffer gas beam, and

Thermometry of Guided Molecular Beams from a Cryogenic Buffer-Gas Cell.

Comparison of the rotational and translational temperatures provides evidence of faster rotational thermalisation for the CH3 F/He system in the limit of low He density.

Laser radiation pressure slowing of a molecular beam.

This work demonstrates deceleration of a beam of neutral strontium monofluoride molecules using radiative forces and lays the groundwork to create slow and cold molecular beams suitable for trap loading.

The buffer gas beam: an intense, cold, and slow source for atoms and molecules.

A survey of the current state of the art in buffer gas beams is presented, and some of the possible future directions that these new methods might take are explored.

Buffer-gas cooling, high-resolution spectroscopy, and optical cycling of barium monofluoride molecules

We demonstrate buffer-gas cooling, high-resolution spectroscopy and cycling fluorescence of cold barium monofluoride (BaF) molecules. Our source produces an intense and internally cold molecular beam

Direct laser cooling of calcium monohydride molecules

We demonstrate optical cycling and laser cooling of a cryogenic buffer-gas beam of calcium monohydride (CaH) molecules. We measure vibrational branching ratios for laser cooling transitions for both

A new route for laser cooling and trapping of cold molecules: Intensity-gradient cooling of MgF molecules using localized hollow beams

We propose a promising scheme to prepare ultracold MgF molecules from a slowed cold molecular beam by using three-dimensional pure intensity-gradient induced Sisyphus cooling. The cooling is based on

Fast and high-yield loading of a D2 magneto-optical trap of potassium from a cryogenic buffer-gas beam

We demonstrate the direct loading of a D2 MOT of potassium-39 atoms from a cryogenic buffer gas beam source. We load 108 atoms in a 10 ms pulse, with no degradation in performance up to a 10 Hz

A Buffer Gas Cooled Molecular Beam Apparatus for Chirped Pulse Millimeter Wave Spectroscopy

An apparatus that utilizes buffer gas cooling to produce slow atomic (Ba, Ca) and molecular (BaF, CaF) beams is constructed. In-cell temperatures of 20 0.25K are achieved with chamber cooldown times



A jet beam source of cold YbF radicals

We have developed a pulsed supersonic beam of slow, cold YbF molecular radicals with an intensity of 1.4 × 109 YbF molecules per steradian per pulse in the X2 Σ+ (v = 0, N = 0) ground state. The

High-flux beam source for cold, slow atoms or molecules.

This work demonstrates and characterize a high-flux beam source for cold, slow atoms or molecules, and compares favorably to existing techniques of beam formation, for a variety of applications.

Intense SrF radical beam for molecular cooling experiments.

A continuous SrF radical beam for the loading of helium buffer gas cooling and the dependence of the flux on oven temperature suggests that even higher flux is possible if a higher temperature in the oven is achieved.

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 600 K) from an oven is mixed with cold (15 K) neon buffer gas, and then emitted

Molecular beam pump/probe microwave‐optical double resonance using a laser ablation source

The first successful pump/probe microwave‐optical double resonance experiment using a laser ablation/reaction scheme for molecular beam production has been performed. Pure rotational transitions at

Optical stark decelerator for molecules.

We demonstrate a single stage optical Stark decelerator for neutral molecules which is capable of reducing the translational energy of benzene molecules within a molecular beam by 15% in a single

Laser cooling of a diatomic molecule

This work experimentally demonstrates laser cooling of the polar molecule strontium monofluoride (SrF) using an optical cycling scheme requiring only three lasers, and bridges the gap between ultracold (submillikelvin) temperatures and the ∼1-K temperatures attainable with directly cooled molecules.

Improved setup for producing slow beams of cold molecules using a rotating nozzle

Physikalisches Institut, Universit¨at Freiburg, 79104 Freiburg, Germany(Dated: October 19, 2009)Intense beams of cold and slow molecules are produced by supersonic expansion out of a rapidlyrotating

Bright, guided molecular beam with hydrodynamic enhancement.

A novel high flux source of cold atoms and molecules employing hydrodynamic enhancement of an effusive aperture at cryogenic temperatures is realized, delivering a cold, continuous, guided flux of 3 x 10(12) O(2) s(-1).

Supersonic metal cluster beams of refractory metals: Spectral investigations of ultracold Mo2

A novel technique involving pulsed laser vaporization of the bulk metal within a pulsed supersonic nozzle has been shown to successfully produce ultracold bare metal clusters of even the most