Weak focusing

Weak focusing

In particle accelerators Weak focusing occurs when particles are kept in reasonably strong, uniform magnetic fields that causes them to move in circles under the influence of the Lorentz force.

Weak focusing is a name for the fact that the trajectories of non-mutually interacting particles moving on these circles intersect. [ [http://www.bnl.gov/bnlweb/history/focusing.asp Brookhaven history- The Alternating Gradient Concept] ]

The effect is reminiscent of the way that similar orbits in space intersect twice per revolution due to gravity.

ee also

*Strong focusing focusing due to asymmetric magnetic fields can achieve much narrower focusing
*Particle accelerator

References


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