Ion source



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An ion source is an electro-magnetic device that is used to create charged particles. These are used primarily within mass spectrometers or particle accelerators.

Mass spectrometry

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In mass analyzer.

There are several types of ion sources:

In particle accelerators

In particle accelerators an ion source creates a particle beam at the beginning of the machine, the Source. The technology to create ion sources for particle accelerators depends strongly on the type of particle that needs to be generated: heavy ion.

Electrons are generated with an electron gun, and there are many varieties of these.

Protons are generated with a magnetron.

work function of the cathode, enhancing the amount of ions that are produced.

For a Penning source, a strong magnetic field parallel to the electric field of the sheath guides electrons and ions on cyclotron spirals from cathode to cathode. Fast H-minus ions are generated at the cathodes as in the magnetron. They are slowed down due to the charge exchange reaction as they migrate to the plasma aperture. This makes for a beam of ions that is colder than the ions obtained from a magnetron.

electron cyclotron resonance ion source. The use of electron cyclotron resonance (ECR) ion sources for the production of intense beams of highly charged ions has immensely grown over the last decade. ECR ion sources are used as injectors into linear accelerators, Van-de-Graaff generators or cyclotrons in nuclear and elementary particle physics. In atomic and surface physics ECR ion sources deliver intense beams of highly charged ions for collision experiments or for the investigation of surfaces.

Theory of Operation

Gas flows through the ion source between the plasma to start. Ions from the plasma are repelled by the anode electric field. This creates an ion beam.[1]

Ion Source Applications

References

  1. ^ Ion Beam Sources. Advanced Energy. Retrieved on 2006-12-14.
  2. ^ Ion Beam Source Technology. Advanced Energy. Retrieved on 2006-12-14.

See also

  • Cold cathode
  • Hot filament
  • RF antenna ion source
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Ion_source". A list of authors is available in Wikipedia.