Phase space structure for matched intense charged-particle beams in periodic focusing transport systems

1999 ◽  
Vol 6 (9) ◽  
pp. 3647-3657 ◽  
Author(s):  
Chiping Chen ◽  
Renato Pakter ◽  
Ronald C. Davidson
Keyword(s):  
Charged Particle ◽  
Phase Space ◽  
Space Structure ◽  
Transport Systems ◽  
Particle Beams ◽  
Phase Space Structure ◽  
Charged Particle Beams

Phase-Space Manipulation of Charged-Particle Beams by Means of Coupling Resonances

2007 ◽  
Vol 76 (7) ◽  
pp. 074501 ◽  
Author(s):  
Hiromi Okamoto ◽  
Kenichi Kaneta ◽  
Andrew M. Sessler
Keyword(s):  
Charged Particle ◽  
Phase Space ◽  
Particle Beams ◽  
Charged Particle Beams

scholarly journals A novel non-adiabatic approach to transition crossing in a circular hadron accelerator

2021 ◽  
Vol 136 (11) ◽  
Author(s):  
M. Giovannozzi ◽  
L. Huang ◽  
A. Huschauer ◽  
A. Franchi
Keyword(s):  
Charged Particle ◽  
Phase Space ◽  
Transition Energy ◽  
Closed Orbit ◽  
Proton Synchrotron ◽  
Particle Accelerators ◽  
Particle Beams ◽  
Super Proton Synchrotron ◽  
Charged Particle Beams ◽  
Adiabatic Approach

AbstractCrossing the transition energy is always a delicate process, representing a potential source of strong perturbations of the dynamics of charged particle beams in a hadron circular accelerator. Since the first generation of multi-GeV rings, intense studies have been devoted to understanding the possible harmful mechanisms involved in transition crossing and to devise mitigation measures. Nowadays, several circular particle accelerators are successfully operating across the transition energy and this process is well mastered. In a completely different context, stable resonances of the traverse phase space have been proposed as new means of manipulating charged particle beams. While the original aim of such a proposal was multi-turn extraction from the CERN Proton Synchrotron to the Super Proton Synchrotron, many more applications have been proposed and studied in detail. In this paper, the two topics, i.e. transition crossing and stable resonances, have been brought together with the goal of providing a novel and non-adiabatic approach to perform a clean transition crossing. The idea presented here is that by judiciously using sextupoles and octupoles it is possible to generate stable islands of the horizontal phase space. These islands represent a second closed orbit whose properties can be selected independently of those of the standard, i.e. central, closed orbit. This provides a means of performing a non-adiabatic change of the transition energy experienced by the charged particles by displacing the beam between the two closed orbits.

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