Emittance growth from rotated quadrupoles in heavy ion accelerators

Author

Barnard, John J.

Author_Institution

Lawrence Livermore Nat. Lab., CA, USA

Volume

5

fYear

1995

fDate

1-5 May 1995

Firstpage

3241

Abstract

We derive a set of moment equations which incorporates linear quadrupolar focusing and space-charge defocusing, in the presence of rotational misalignments of the quadrupoles about the direction of beam propagation. Although the usual beam emittance measured relative to fixed transverse x and y coordinate axes is not constant, a conserved emittance-like quantity has been found. Implications for alignment tolerances in accelerators for heavy-ion inertial fusion are discussed

Keywords

accelerator magnets; ion accelerators; particle beam focusing; particle beam fusion accelerators; alignment tolerances; beam emittance; beam propagation; conserved emittance-like quantity; emittance growth; fixed transverse x coordinate axes; fixed transverse y coordinate axes; heavy ion accelerators; heavy-ion inertial fusion; linear quadrupolar focusing; moment equations; rotated quadrupoles; rotational misalignments; space-charge defocusing; Atomic beams; Atomic measurements; Bismuth; Equations; Ion accelerators; Ion beams; Motion estimation; Particle beams; Protons; Space charge;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505842

Filename

505842