Published March 1998 | Version v1
Journal article Metadata-only

A Mechanism of Anomalous Diffusion in Particle Beams

Creators

  • 1. Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)
  • 2. Fermilab, P.O. Box 500, Batavia, Illinois 60510 (United States)
  • 3. AGS Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)

Description

Experimental observation of particle diffusion mechanism in the presence of overlapping parametric resonances generated by a time dependent rf phase modulation is analyzed. We find that the regime of fast emittance growth is associated with the rapid particle motion along the separatrix of a dominant parametric resonance, the slow growth regime is related to particle diffusion in the chaotic sea, and the emittance saturation occurs when beam particles fill the chaotic region bounded by an invariant torus. Experimental data observed at the Indiana University Cyclotron Facility (IUCF) Cooler Ring are shown to agree well with the theoretical analysis. copyright 1998 The American Physical Society

Additional details

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
80
Journal Issue
11
Journal Page Range
p. 2314-2317.
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
29036954
Subject category
S43: PARTICLE ACCELERATORS; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
BEAM EMITTANCE; CYCLOTRONS; DIFFUSION; KINETIC ENERGY; MODULATION; RESONANCE; SATURATION; TIME DEPENDENCE
Descriptors DEC
ACCELERATORS; CYCLIC ACCELERATORS; ENERGY