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Title: Studies of Beam Optics and Scattering in the Next Linear Collider Post-Linac Collimation System

Abstract

The authors present a new conceptual and optical design for the Next Linear Collider post-linac collimation system. Energy collimation and passive protection against off-energy beams are achieved in a system with large horizontal dispersion and vertical betatron functions. Betatron collimation is performed in a relatively low-beta (FODO-like) lattice in which only thin spoilers intercept particles near the beam core, while thick absorbers maintain a large stay-clear from the beam. Two possible schemes for the spoilers are considered: one in which the spoilers are capable of tolerating a certain number of damaging interceptions per collider run (consumable spoilers), and one in which the spoilers are potentially damaged on every machine pulse and are self-repairing (renewable spoilers). The collimation efficiency of the system is evaluated, considering both halo particles which are rescattered into the beam and muon secondaries which are passed to the interaction region. They conclude that the new design is a promising candidate for the NLC post-linac system.

Authors:
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
764980
Report Number(s):
SLAC-PUB-8562
TRN: US0005003
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 29 Aug 2000
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM OPTICS; BETATRONS; DESIGN; LINEAR COLLIDERS; MUONS; SCATTERING; COLLIMATORS

Citation Formats

Tenenbaum, Peter G. Studies of Beam Optics and Scattering in the Next Linear Collider Post-Linac Collimation System. United States: N. p., 2000. Web. doi:10.2172/764980.
Tenenbaum, Peter G. Studies of Beam Optics and Scattering in the Next Linear Collider Post-Linac Collimation System. United States. https://doi.org/10.2172/764980
Tenenbaum, Peter G. 2000. "Studies of Beam Optics and Scattering in the Next Linear Collider Post-Linac Collimation System". United States. https://doi.org/10.2172/764980. https://www.osti.gov/servlets/purl/764980.
@article{osti_764980,
title = {Studies of Beam Optics and Scattering in the Next Linear Collider Post-Linac Collimation System},
author = {Tenenbaum, Peter G},
abstractNote = {The authors present a new conceptual and optical design for the Next Linear Collider post-linac collimation system. Energy collimation and passive protection against off-energy beams are achieved in a system with large horizontal dispersion and vertical betatron functions. Betatron collimation is performed in a relatively low-beta (FODO-like) lattice in which only thin spoilers intercept particles near the beam core, while thick absorbers maintain a large stay-clear from the beam. Two possible schemes for the spoilers are considered: one in which the spoilers are capable of tolerating a certain number of damaging interceptions per collider run (consumable spoilers), and one in which the spoilers are potentially damaged on every machine pulse and are self-repairing (renewable spoilers). The collimation efficiency of the system is evaluated, considering both halo particles which are rescattered into the beam and muon secondaries which are passed to the interaction region. They conclude that the new design is a promising candidate for the NLC post-linac system.},
doi = {10.2172/764980},
url = {https://www.osti.gov/biblio/764980}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 29 00:00:00 EDT 2000},
month = {Tue Aug 29 00:00:00 EDT 2000}
}