Use of multipole magnetic fields for making uniform irradiations

https://doi.org/10.1016/0168-583X(89)90527-2Get rights and content

Abstract

A technique using multipole magnetic fields to shape charged particle intensity distributions is discussed. The concept is to use the nonlinear magnetic field of a multipole to preferentially focus the edges of a particle distribution back to the center in such a way that the final distribution is uniform. The integral transformation theory of this technique is presented. Calculations show that a Gaussian-shaped intensity distribution can be smoothed to better than 5% uniformity for up to 95% of the initial beam intensity. A sample beamline and variable strength multipole are presented.

References (9)

  • H. Blosser
  • E. Kashy et al.

    Nucl. Instr. and Meth.

    (1987)
  • C.H. Johnson

    Nucl. Instr. and Meth.

    (1975)
  • H.D. Ferguson et al.

    Nucl. Instr. and Meth.

    (1976)
There are more references available in the full text version of this article.

Cited by (0)

View full text