CERN Accelerating science

Article
Report number	CERN-PBC-CONF-2024-003
Title	Performance of a double-crystal setup for LHC fixed-target experiments
Author(s)	Dewhurst, K A (CERN) ; D'Andrea, M (CERN) ; Hermes, P D (CERN) ; Mirarchi, D (CERN) ; Redaelli, S (CERN) ; Patecki, M (Warsaw U. of Tech.)
Publication	2023
Number of pages	4
In:	JACoW IPAC 2023 (2023) MOPL048
In:	14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL048
DOI	10.18429/JACoW-IPAC2023-MOPL048
Subject category	Accelerators and Storage Rings
Abstract	The Physics Beyond Colliders (PBC) studies at CERN address the possibility to utilise protons in the Large Hadron Collider (LHC) for a fixed-target program beyond the colliding-beam physics. As part of PBC, a double-crystal test stand is considered for installation in the LHC off-momentum collimation Insertion Region (IR) 3. In this PBC experiment, a first silicon crystal deflects beam-halo protons from the main beam onto a fixed-target. A second crystal, providing bending angles in the mrad range, is located immediately downstream of the target to deflect target-produced secondary particles onto a detector that will measure the electric and magnetic dipole moments of short-lived baryons. The LHC test stand will serve as a proof-of-principle machine experiment to assess the performance of new crystals at LHC energies and to address a number of critical machine aspects related to this complex setup. In this paper, simulations in MAD-X and SixTrack are used to predict the performance of the proposed double-crystal layout for the LHC Run 3 test stand and the LHC Run 4 final experiment.
Copyright/License	© 2023-2024 the author(s) (License: CC-BY-4.0)

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