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Title: The Provision of IP Crossing Angles for the SSC

Abstract

Luminosity is to be produced at the SSC collider by crossing with finite angle the counter circulating proton beams at each interaction point (IP). Such a crossing angle introduces unwanted dispersion in the high beta triplet quadrupoles adjacent to the IPs which must be corrected out. they propose to produce variable crossing conditions at each IP with local steering dipoles adjusted to give required slopes and displacements for each IP. The anomalous dispersion introduced by these orbit displacements will be corrected in the arcs (dispersive region) just prior to entry and exit into the IRs with opposite polarity quadrupole pairs separated by 90{sup o} in phase, a late correction scheme. Such pairs cause minimal change to the betatron functions but produce dispersion that can be set to cancel the anomalous dispersion. The IR design is such that the phase advance between correctors and the IP triplet gives efficient full local anomalous dispersion cancellation. The proposed system is to be formed from standard SSC corrector elements and will provide the range of crossing conditions required for collision optics and for separating the beams at injection.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Science (US)
OSTI Identifier:
813306
Report Number(s):
SLAC-PUB-10053
TRN: US0303846
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: Paper presented at the 1993 IEEE Particle Accelerator Conference (PAC93), Washington, DC (US), 05/17/1993--05/20/1993; PBD: 11 Jul 2003
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BETATRONS; CANCELLATION; DESIGN; DIPOLES; LUMINOSITY; OPTICS; PROTON BEAMS; QUADRUPOLES; SUPERCONDUCTING SUPER COLLIDER; TRIPLETS

Citation Formats

Ritson, David M. The Provision of IP Crossing Angles for the SSC. United States: N. p., 2003. Web. doi:10.2172/813306.
Ritson, David M. The Provision of IP Crossing Angles for the SSC. United States. doi:10.2172/813306.
Ritson, David M. Fri . "The Provision of IP Crossing Angles for the SSC". United States. doi:10.2172/813306. https://www.osti.gov/servlets/purl/813306.
@article{osti_813306,
title = {The Provision of IP Crossing Angles for the SSC},
author = {Ritson, David M},
abstractNote = {Luminosity is to be produced at the SSC collider by crossing with finite angle the counter circulating proton beams at each interaction point (IP). Such a crossing angle introduces unwanted dispersion in the high beta triplet quadrupoles adjacent to the IPs which must be corrected out. they propose to produce variable crossing conditions at each IP with local steering dipoles adjusted to give required slopes and displacements for each IP. The anomalous dispersion introduced by these orbit displacements will be corrected in the arcs (dispersive region) just prior to entry and exit into the IRs with opposite polarity quadrupole pairs separated by 90{sup o} in phase, a late correction scheme. Such pairs cause minimal change to the betatron functions but produce dispersion that can be set to cancel the anomalous dispersion. The IR design is such that the phase advance between correctors and the IP triplet gives efficient full local anomalous dispersion cancellation. The proposed system is to be formed from standard SSC corrector elements and will provide the range of crossing conditions required for collision optics and for separating the beams at injection.},
doi = {10.2172/813306},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {7}
}

Technical Report:

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