Next-Generation Linear Collider Final Focus System Stability Tolerances
Abstract
The design of final focus systems for the next generation of linear colliders has evolved largely from the experience gained with the design and operation of the Stanford Linear Collider (SLC) and with the design of the Final Focus Test Beam (FFTB). We will compare the tolerances for two typical designs for a next-generation linear collider final focus system. The chromaticity generated by strong focusing systems, like the final quadrupole doublet before the interaction point of a linear collider, can be canceled by the introduction of sextupoles in a dispersive region. These sextupoles must be inserted in pairs separated by a -I transformation (Chromatic Correction Section) in order to cancel the strong geometric aberrations generated by sextupoles. Designs proposed for both the JLC or NLC final focus systems have two separate chromatic correction sections, one for each transverse plane separated by a ''{beta}-exchanger'' to manipulate the {beta}-function between the two CCS. The introduction of sextupoles and bending magnets gives rise to higher order aberrations (long sextupole and chrome-geometries) and radiation induced aberrations (chromaticity unbalance and ''Oide effect'') and one must optimize the lattice accordingly.
- Authors:
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 902726
- Report Number(s):
- SLAC-PUB-12485
TRN: US200719%%112
- DOE Contract Number:
- AC02-76SF00515
- Resource Type:
- Conference
- Resource Relation:
- Conference: Contributed to 1990 DPF Summer Study on High-energy Physics: Research Directions for the Decade (Snowmass 90), Snowmass, Colorado, 25 Jun - 13 Jul 1990
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; DESIGN; FOCUSING; LINEAR COLLIDERS; MAGNETS; QUADRUPOLES; STABILITY; BEAM OPTICS; CHROMATIC ABERRATIONS; CORRECTIONS; Accelerators,ACCPHY
Citation Formats
Roy, G, Irwin, J, and /SLAC. Next-Generation Linear Collider Final Focus System Stability Tolerances. United States: N. p., 2007.
Web.
Roy, G, Irwin, J, & /SLAC. Next-Generation Linear Collider Final Focus System Stability Tolerances. United States.
Roy, G, Irwin, J, and /SLAC. 2007.
"Next-Generation Linear Collider Final Focus System Stability Tolerances". United States. https://www.osti.gov/servlets/purl/902726.
@article{osti_902726,
title = {Next-Generation Linear Collider Final Focus System Stability Tolerances},
author = {Roy, G and Irwin, J and /SLAC},
abstractNote = {The design of final focus systems for the next generation of linear colliders has evolved largely from the experience gained with the design and operation of the Stanford Linear Collider (SLC) and with the design of the Final Focus Test Beam (FFTB). We will compare the tolerances for two typical designs for a next-generation linear collider final focus system. The chromaticity generated by strong focusing systems, like the final quadrupole doublet before the interaction point of a linear collider, can be canceled by the introduction of sextupoles in a dispersive region. These sextupoles must be inserted in pairs separated by a -I transformation (Chromatic Correction Section) in order to cancel the strong geometric aberrations generated by sextupoles. Designs proposed for both the JLC or NLC final focus systems have two separate chromatic correction sections, one for each transverse plane separated by a ''{beta}-exchanger'' to manipulate the {beta}-function between the two CCS. The introduction of sextupoles and bending magnets gives rise to higher order aberrations (long sextupole and chrome-geometries) and radiation induced aberrations (chromaticity unbalance and ''Oide effect'') and one must optimize the lattice accordingly.},
doi = {},
url = {https://www.osti.gov/biblio/902726},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Apr 25 00:00:00 EDT 2007},
month = {Wed Apr 25 00:00:00 EDT 2007}
}