CERN Accelerating science

Published Articles
Title	Power Deposition in LHC Magnets With and Without Dispersion Suppressor Collimators Downstream of the Betatron Cleaning Insertion
Author(s)	Lechner, Anton (CERN) ; Auchmann, Bernhard (CERN) ; Bruce, Roderik (CERN) ; Cerutti, Francesco (CERN) ; Granieri, Pier Paolo (CERN) ; Marsili, Aurelien (CERN) ; Redaelli, Stefano (CERN) ; Shetty, Nikhil Vittal (CERN) ; Skordis, Eleftherios (CERN) ; Steele, Genevieve (CERN) ; Verweij, Arjan (CERN)
Publication	2014
Number of pages	4
In:	5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.MOPRO021
DOI	10.18429/JACoW-IPAC2014-MOPRO021
Subject category	Accelerators and Storage Rings
Abstract	The power deposited in dispersion suppressor (DS) magnets downstream of the LHC betatron cleaning insertion is governed by off-momentum protons which predominantly originate from single-diffractive interactions in primary collimators. With higher beam energy and intensities anticipated in future operation, these clustered proton losses could possibly induce magnet quenches during periods of short beam lifetime. In this paper, we present FLUKA simulations for nominal 7 TeV operation, comparing the existing layout with alternative layouts where selected DS dipoles are substituted by pairs of shorter higher-field magnets and a collimator. Power densities predicted for different collimator settings are compared against present estimates of quench limits. Further, the expected reduction factor due to DS collimators is evaluated.
Copyright/License	publication: (License: CC-BY)

Corresponding record in: Inspire