You need JavaScript to view this

Beam halo in high-intensity hadron linacs

Abstract

This document aims to cover the most relevant mechanisms for the development of beam halo in high-intensity hadron linacs. The introduction outlines the various applications of high-intensity linacs and it will explain why, in the case of the CERN Superconducting Proton Linac (SPL) study a linac was chosen to provide a high-power beam, rather than a different kind of accelerator. The basic equations, needed for the understanding of halo development are derived and employed to study the effects of initial and distributed mismatch on high-current beams. The basic concepts of the particle-core model, envelope modes, parametric resonances, the free-energy approach, and the idea of core-core resonances are introduced and extended to study beams in realistic linac lattices. The approach taken is to study the behavior of beams not only in simplified theoretical focusing structures but to highlight the beam dynamics in realistic accelerators. All effects which are described and derived with simplified analytic models, are tested in realistic lattices and are thus related to observable effects in linear accelerators. This approach involves the use of high-performance particle tracking codes, which are needed to simulate the behavior of the outermost particles in distributions of up to 100 million macro particles. In  More>>
Authors:
Publication Date:
Dec 21, 2006
Product Type:
Thesis/Dissertation
Report Number:
INIS-DE-0204
Resource Relation:
Other Information: TH: Diss. (Dr.-Ing.)
Subject:
43 PARTICLE ACCELERATORS; PROTON BEAMS; CERN LINAC; EQUATIONS OF MOTION; RESONANCE; BEAM DYNAMICS; BEAM TRANSPORT; TRAJECTORIES; SPACE CHARGE; COMPUTERIZED SIMULATION; I CODES; THREE-DIMENSIONAL CALCULATIONS
OSTI ID:
20855460
Research Organizations:
Technische Univ., Berlin (Germany). Fakultaet IV - Elektrotechnik, Informatik
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
TRN: DE07F4451
Availability:
Commercial reproduction prohibited; INIS; OSTI as DE20855460
Submitting Site:
DEN
Size:
100 pages
Announcement Date:
Apr 12, 2007

Citation Formats

Gerigk, F. Beam halo in high-intensity hadron linacs. Germany: N. p., 2006. Web.
Gerigk, F. Beam halo in high-intensity hadron linacs. Germany.
Gerigk, F. 2006. "Beam halo in high-intensity hadron linacs." Germany.
@misc{etde_20855460,
title = {Beam halo in high-intensity hadron linacs}
author = {Gerigk, F}
abstractNote = {This document aims to cover the most relevant mechanisms for the development of beam halo in high-intensity hadron linacs. The introduction outlines the various applications of high-intensity linacs and it will explain why, in the case of the CERN Superconducting Proton Linac (SPL) study a linac was chosen to provide a high-power beam, rather than a different kind of accelerator. The basic equations, needed for the understanding of halo development are derived and employed to study the effects of initial and distributed mismatch on high-current beams. The basic concepts of the particle-core model, envelope modes, parametric resonances, the free-energy approach, and the idea of core-core resonances are introduced and extended to study beams in realistic linac lattices. The approach taken is to study the behavior of beams not only in simplified theoretical focusing structures but to highlight the beam dynamics in realistic accelerators. All effects which are described and derived with simplified analytic models, are tested in realistic lattices and are thus related to observable effects in linear accelerators. This approach involves the use of high-performance particle tracking codes, which are needed to simulate the behavior of the outermost particles in distributions of up to 100 million macro particles. In the end a set of design rules are established and their impact on the design of a typical high-intensity machine, the CERN SPL, is shown. The examples given in this document refer to two different design evolutions of the SPL study: the first conceptual design report (SPL I) and the second conceptual design report (SPL II). (orig.)}
place = {Germany}
year = {2006}
month = {Dec}
}