NDLI: Optics solutions for the collimation insertions of LHC

Content Provider	IEEE Xplore Digital Library
Author	Kaltchev, D.I. Craddock, M.K.
Copyright Year	1999
Description	Author affiliation: TRIUMF, Vancouver, BC, Canada (Kaltchev, D.I.)
Abstract	While the two collimation insertions in the LHC must have similar basic layouts and match to almost identical dispersion suppressors to respect the geometry of the existing tunnel, their different roles impose opposite requirements on the normalized dispersion within them. For betatron collimation it must be near zero, while for momentum collimation it must have a peak at the location of the primary collimator, immediately after the dispersion suppressor. The insertion lattice solution found for the latter case requires up to 30% asymmetry in the quadrupole gradients (in line with the current trend in LHC lattice development to break the exact antisymmetry within insertions). To achieve this using twin-aperture warm quadrupoles, the modules making up each quadrupole will be wired in such a way that the two beams still see the same sequence of focusing fields. We describe the optimum setup, flexibility and collimation quality for the two insertions.
Starting Page	2623
Ending Page	2625
File Size	242919
Page Count	3
File Format	PDF
ISBN	0780355733
DOI	10.1109/PAC.1999.792883
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-03-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical collimators Large Hadron Collider Apertures Protons Superconducting magnets Lattices Particle beams Magnetic flux Chaos Geometry
Content Type	Text
Resource Type	Article

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