CERN Accelerating science

Internal Note
Report number	CERN-ACC-NOTE-2018-0009
Title	Beam-induced heat loads on the beam screens of the inner triplets for the HL-LHC
Author(s)	Skripka, Galina (CERN) ; Iadarola, Giovanni (CERN)
Corporate author(s)	CERN. Geneva. ATS Department
Publication	2018
Imprint	21 Feb 2018
Number of pages	50
DOI	10.17181/CERN.I7WJ.TNS9
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC
Project	CERN HL-LHC
Abstract	The expected heat load induced on the beam screens has been evaluated for the triplet assemblies in the four experimental Insertion Regions (IRs) of the HL-LHC. The contribution from electron cloud effects has been estimated using PyECLOUD macroparticle simulations. The presence of a surface treatment for the reduction of the Secondary Electron Yield has been taken into account. The contribution from the impedance of the beam screen has been evaluated taking into account the impact of the temperature and of the magnetic field on the resistivity of the surface.
Submitted by	[email protected]