ALICE tomography section: phase-space measurements and analysis



Ibison, Mark
ALICE tomography section: phase-space measurements and analysis. [Unspecified]

[img] PDF
IbisonMar_Sep2013_13193.pdf - Accepted Version
Available under License Creative Commons Attribution No Derivatives.

Download (8MB)

Abstract

The technique of phase-space tomography applies the principles of tomographic re-construction to the diagnostics of particle accelerator beams. It is one of the few methods capable of mapping phase-space in detail, using instrumentation commonly available on research accelerator beam-lines, that is, beam profile imaging and variable focussing magnets. This thesis studies the effects of space-charge in the particle bunch on the measurement of transverse phase-space, in the horizontal and vertical dimensions, by the beam tomography method. It applies a novel `comparative' method of using quadrupole tomography scanning to look for these effects, over the length of the diagnostic section of the injection line which transfers the electron beam from the ALICE accelerator to the Electron Model for Many Applications (EMMA) ring at the Daresbury Laboratory. Simulations of the full tomographic process, from beam profle imaging to reconstruction, are developed in the particle tracking code GPT. These are used to investigate space-charge effects, in support of the experimental studies. The concept of `normalised phase-space' is described, in the context of tomography with a very limited number of views, presenting its advantages as applied to a specific type of reconstruction algorithm, the Maximum Entropy Technique. Recommendations for future work in this field are suggested, with possible application both for new machines at the Daresbury Laboratory, and at other accelerator facilities.

Item Type: Unspecified
Additional Information: Date: 2013-09 (completed)
Uncontrolled Keywords: Accelerators, phase-space, tomography, ALICE
Subjects: Q Science > QC Physics
Divisions: ?? dep_physic ??
Depositing User: Symplectic Admin
Date Deposited: 12 Feb 2014 10:35
Last Modified: 03 Mar 2021 10:12
URI: https://livrepository.liverpool.ac.uk/id/eprint/13193