title: Rotations of the low-{beta} quadrupoles: Coupling in the Tevatron and the
 effect on the luminosity
creator: Gelfand, N.M.
contributor: United States. Department of Energy.
publisher: Fermi National Accelerator Laboratory
date: 1996-04-01
language: English
description: It is now generally recognized that a large roll, {approx} 6--7 mr,
 in a triplet low-{beta} quadrupole, which couples the horizontal and vertical
 motion of the beam, can significantly reduce the luminosity and impact the
 operation of the Tevatron. The question then arises, what is the effect of the
 small rolls of the low-{beta} quadrupoles on the luminosity. They will
 consider random rolls with a {sigma} = 1,2 and 4mr which can be expected due
 to errors in the surveys, or changes in alignment after the survey. In the
 actual operation of the Tevatron they attempt to correct for the coupling and
 so this study will consider correction schemes and will compare the
 luminosity, after correction, with a configuration with no rolls.
subject: Positioning
subject: Fermilab Tevatron
subject: 43 Particle Accelerators
subject: Quadrupoles
subject: Beam Luminosity
subject: Equations Of Motion
subject: Beam Focusing Magnets
subject: Beam Optics
subject: Beam Emittance
subject: Rotation
source: Other Information: PBD: Apr 1996
type: Report
format: 11 p.
format: Text
identifier: other: DE96009370
identifier: rep-no: FNAL-TM--1967
identifier: grantno: AC02-76CH03000
identifier: doi: 10.2172/226067
identifier: osti: 226067
identifier: https://digital.library.unt.edu/ark:/67531/metadc673291/
identifier: ark: ark:/67531/metadc673291