CERN Accelerating science

Article
Title	Beam dynamics for concurrent operation of the LHeC and the HL-LHC
Author(s)	von Witzleben, T (CERN ; RWTH Aachen U.) ; André, K D J (CERN) ; De Maria, R (CERN) ; Holzer, B (CERN) ; Klein, M (Liverpool U.) ; Pretz, J (RWTH Aachen U. ; Julich, Forschungszentrum) ; Smith, M (Liverpool U.)
Publication	2023
Number of pages	4
In:	JACoW IPAC 2023 (2023) MOPA054
In:	14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPA054
DOI	10.18429/JACoW-IPAC2023-MOPA054
Subject category	Accelerators and Storage Rings
Abstract	The Large Hadron Electron Collider (LHeC) is a study at CERN to construct an energy recovery linear accelerator (ERL) tangentially to the High Luminosity Large Hadron Collider (HL-LHC). This would enable deep inelastic scattering collisions between electrons and protons in the ALICE interaction region (IR2). In this design, one of the two proton beams of the HL-LHC collides with the electron beam in IR2, while the second proton beam avoids this collision. This way, the e-p collisions can take place concurrently with p-p collisions in ATLAS, CMS and LHCb. The LHeC/ALICE interaction region is laid out for alternate e-p and p-p data, using a common detector, suitable for this novel way of interaction. It therefore requires a highly precise beam optics and orbit for the three beams: the two proton beams of the HL-LHC, as well as the electron beam from the ERL. The highly asymmetric optics and orbits of the two proton beams, allowing concurrent operation of the HL-LHC experiments and e-p collisions, have been investigated with MAD-X. The impact of an optimized electron mini-beta insertion, focusing and bending the electrons, on the proton beam dynamics has been considered.
Copyright/License	CC-BY-4.0

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