CERN Accelerating science

Article
Title	Synchrotron Radiation Studies for a Ring-Ring LHeC Interaction Region and Long Straight Section
Author(s)	Thompson, L (Cockcroft Inst. Accel. Sci. Tech. ; U. Manchester (main)) ; Bruning, OS (CERN) ; Appleby, RB (Cockcroft Inst. Accel. Sci. Tech.) ; Kostka, P (DESY) ; Bernard, NR (Zurich, ETH) ; Nagorny, B (DESY) ; Klein, M (CERN ; U. Liverpool (main)) ; Holzer, BJ (CERN)
Publication	2012
Number of pages	3
In:	Conf. Proc. C1205201 (2012) pp.TUPPC039
In:	3rd International Particle Accelerator Conference, New Orleans, LA, USA, 20 - 25 May 2012, pp.1248-1250
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHeC
Abstract	The Large Hadron Electron Collider project is a proposal to study e-p and e-A interactions at the LHC. In the design for an electron synchrotron (alternative designs for a linac are also under development), a 60GeV e beam is collided with a 7TeV LHC proton beam to produce TeVscale collisions. Despite being much lower energy than the proton beam, the electron beam is high enough energy to produce significant amounts of synchrotron radiation (SR). This places strong constraints on beam optics and bending. In particular challenges arise with the complex geometry required by the long straight section (LSS) and interaction region (IR). This includes the coupled nature of the proton and electron optics, as SR produced by the electron beam must not be allowed to quench the superconducting proton magnets or create problems with beam-gas backgrounds. Despite this, the electron beam must be deflected signifi- cantly within the IR to produce sufficient separation from the proton beam.