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Title: Using octupoles for background control in linear colliders -- An exploratory conceptual study

Abstract

If one adds a suited Octupole (or an even higher multipole) lattice to linear collider Quadrupole FODO lattices, the amplifying properties of the combined lattice drive particles in the tails, but not those in the core, into resonant losses. This approach is quite different in concept and beam dynamics impact from past proposed use of non-linear elements for collimation. This non-traditional scheme for background control has the added advantage that most, or maybe all, of the Halo collimation can be done using the lever arm of the real estate of the main accelerators, thus reducing the costly length of a separate dedicated collimation section and also unifying machine protection and background control. Simulations of particle distributions are presented. This approach requires cooperation by the designers of the accelerators, the beam delivery system, and the Detector, because a careful balance between sometimes conflicting requirements has to be found. As a second component of this approach the use of Octupoles right before the final focusing Quadrupoles is proposed in order to enlarge the effective beam stay clear by a factor of 2--3, thus reducing the requirements for collimation. This concept would reduce the requirement for collimation but simulation have not been carriedmore » out here in detail. To further explore and implement this concept will require a considerable effort in manpower, possibly comparable to, although less in scope, than the effort to develop the NLC RF or the CLIC RF schemes.« less

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
753321
Report Number(s):
SLAC-PUB-8402
TRN: US0001939
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 9 Mar 2000
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; MULTIPOLES; MAGNETIC FIELD CONFIGURATIONS; BEAM DYNAMICS; COLLIMATORS; BEAM OPTICS; LINEAR COLLIDERS

Citation Formats

Pitthan, R. Using octupoles for background control in linear colliders -- An exploratory conceptual study. United States: N. p., 2000. Web. doi:10.2172/753321.
Pitthan, R. Using octupoles for background control in linear colliders -- An exploratory conceptual study. United States. doi:10.2172/753321.
Pitthan, R. Thu . "Using octupoles for background control in linear colliders -- An exploratory conceptual study". United States. doi:10.2172/753321. https://www.osti.gov/servlets/purl/753321.
@article{osti_753321,
title = {Using octupoles for background control in linear colliders -- An exploratory conceptual study},
author = {Pitthan, R.},
abstractNote = {If one adds a suited Octupole (or an even higher multipole) lattice to linear collider Quadrupole FODO lattices, the amplifying properties of the combined lattice drive particles in the tails, but not those in the core, into resonant losses. This approach is quite different in concept and beam dynamics impact from past proposed use of non-linear elements for collimation. This non-traditional scheme for background control has the added advantage that most, or maybe all, of the Halo collimation can be done using the lever arm of the real estate of the main accelerators, thus reducing the costly length of a separate dedicated collimation section and also unifying machine protection and background control. Simulations of particle distributions are presented. This approach requires cooperation by the designers of the accelerators, the beam delivery system, and the Detector, because a careful balance between sometimes conflicting requirements has to be found. As a second component of this approach the use of Octupoles right before the final focusing Quadrupoles is proposed in order to enlarge the effective beam stay clear by a factor of 2--3, thus reducing the requirements for collimation. This concept would reduce the requirement for collimation but simulation have not been carried out here in detail. To further explore and implement this concept will require a considerable effort in manpower, possibly comparable to, although less in scope, than the effort to develop the NLC RF or the CLIC RF schemes.},
doi = {10.2172/753321},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {3}
}

Technical Report:

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