Taming molecular beams

@article{Meerakker2008TamingMB,
  title={Taming molecular beams},
  author={Sebastiaan Y. T. van de Meerakker and Hendrick L. Bethlem and Gerard Meijer},
  journal={Nature Physics},
  year={2008},
  volume={4},
  pages={595-602}
}
The motion of neutral molecules in a beam can be manipulated with inhomogeneous electric and magnetic fields. Static fields can be used to deflect or focus molecules, whereas time-varying fields can be used to decelerate or accelerate beams of molecules to any desired velocity. We review the possibilities that this molecular-beam technology offers, ranging from ultrahigh-resolution spectroscopy using molecular fountains to novel crossed-beam scattering experiments. The ability to control the… 

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References

SHOWING 1-10 OF 108 REFERENCES

Longitudinal focusing and cooling of a molecular beam.

TLDR
This work has shown how the longitudinal phase-space distribution of the ensemble of molecules is rotated uniformly is used to longitudinally focus a pulsed beam of ammonia molecules and to produce a beam with a longitudinal velocity spread.

Alternate gradient focusing and deceleration of a molecular beam.

TLDR
It is demonstrated that an array of dipole lenses in alternate gradient configuration can be used to maintain transverse stability on molecules in high-field seeking states.

An atomic coilgun: using pulsed magnetic fields to slow a supersonic beam

We report the experimental demonstration of a novel method to slow atoms and molecules with permanent magnetic moments using pulsed magnetic fields. In our experiments, we observe the slowing of a

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

Alternating gradient focusing and deceleration of polar molecules

Beams of polar molecules can be focused using an array of electrostatic lenses in alternating gradient (AG) configuration. They can also be accelerated or decelerated by applying an appropriate

Stark deceleration and trapping of OH radicals.

TLDR
A new generation Stark decelerator and electrostatic trap that selects a significant part of a molecular beam pulse that can be loaded into the trap and deceleration and trapping experiments using a beam of OH radicals are discussed.

A prototype storage ring for neutral molecules

TLDR
Stochastic cooling might provide a means to increase the phase-space density of the stored molecules in the storage ring, and it is expected this to open up new opportunities for molecular spectroscopy and studies of cold molecular collisions.

Controlling the motion of cold molecules with deep periodic optical potentials

The application of optical forces has allowed unprecedented control over the motion of atoms leading to laser cooling and trapping1 and Bose–Einstein condensation2. More recently, the manipulation of

Slow beams of massive molecules

Abstract.Slow beams of neutral molecules are of great interest for a wide range of applications, from cold chemistry through precision measurements to tests of the foundations of quantum mechanics.

Deflection of Neutral Molecules using the Nonresonant Dipole Force

The ac Stark shift produced by nonresonant radiation creates a potential minimum for a ground state molecule at the position where the laser intensity is maximum. The gradient of this potential
...