Manipulation and control of molecular beams.

  title={Manipulation and control of molecular beams.},
  author={Sebastiaan Y. T. van de Meerakker and Hendrick L. Bethlem and Nicolas Vanhaecke and Gerard Meijer},
  journal={Chemical reviews},
  volume={112 9},
A study was conducted to demonstrate the manipulation of molecular beams with electric and magnetic fields. Seeded pulsed supersonic expansions were employed to conduct the investigations. The conservative forces exerted further downstream by the electric and magnetic fields enabled the researchers to manipulate and control the shape and the position of the distribution in the six-dimensional phase-space. All of the original experimental geometries were devised to create strong magnetic or… 

Manipulation and Control of Molecular Beams: The Development of the Stark-Decelerator

  • G. Meijer
  • Physics
    Molecular Beams in Physics and Chemistry
  • 2021
State-selective manipulation of beams of atoms and molecules with electric and magnetic fields has been crucial for the success of the field of molecular beams. Originally, this manipulation only

Manipulation of molecules with electromagnetic fields

The goal of the present article is to review the major developments that have led to the current understanding of molecule–field interactions and experimental methods for manipulating molecules with

Taming molecular collisions using electric and magnetic fields.

An overview of the various manipulation tools is presented, how they can be used to advantage in molecular beam scattering experiments, and recent progress in this field are reviewed.

Manipulating the motion of polar molecules with microwave radiation

Microwave radiation coupled into a cylindrically symmetric resonator is used to focus, guide, decelerate, and accelerate ammonia molecules in high-field-seeking states. In a first series of

Versatile electric fields for the manipulation of ultracold NaK molecules

In this paper, we present an electrode geometry for the manipulation of ultracold, rovibrational ground state NaK molecules. The electrode system allows to induce a dipole moment in trapped diatomic

Manipulation of translational motion of methyl radicals by pulsed magnetic fields.

The present result shows that Zeeman deceleration of polyatomic free radicals in the doublet state can be realized, which opens possibilities for trapping cold polyatomicFree radicals in a spatially confined area leading to further studies of cold collisions and reactions.

Electrostatic beam splitter for polar molecules

  • Shengqiang Li
  • Physics
    International Journal of Modern Physics B
  • 2018
An electrostatic beam splitter composed of three charged poles for polar molecules in weak-field-seeking states is proposed. First, the schematic diagram is given. Then we calculate the spatial

A magnetically focused molecular beam source for deposition of spin-polarised molecular surface layers.

A modified magnetic focusing apparatus is presented and it is shown that it can be used to separate the spin isomers of acetylene and methane and estimations for the spin purity and the significantly improved molecular flux obtained with the new setup are provided.

Unraveling Cold Molecular Collisions: Stark Decelerators in Crossed-Beam Experiments.

The first generation of these "cold and controlled" scattering experiments that have been conducted in the last decade are reviewed and the prospects for this emerging field of research in the years to come are discussed.



Taming molecular beams

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

Molecular beams with a tunable velocity.

This work presents a compact molecular beam machine, capable of producing 3D spatially focused packets of state-selected accelerated or decelerated molecules.

Collision experiments with Stark-decelerated beams.

A variety of experimental geometries are discussed that exploit this new molecular beam technology for scattering experiments, ranging from crossed beam arrangements and molecular synchrotrons to surface scattering set-ups.

Longitudinal focusing and cooling of a molecular beam.

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.

Two‐dimensional imaging of metastable CO molecules

Direct time and spatially resolved detection of metastable CO molecules, prepared in selected quantum states via pulsed laser excitation, is experimentally demonstrated in a molecular beam machine.

Alternate gradient focusing and deceleration of a molecular beam.

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.

A prototype storage ring for neutral molecules

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.

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).

A novel design for electric field deflectometry on extended molecular beams

We discuss the optimal shape of a beam deflector with applications in electric susceptibility measurements on wide molecular beams. In contrast to the well-established ‘two-wire’ concept, which is