CERN Accelerating science

Article
Title	Beam-beam long range compensator mechanical demonstrator
Author(s)	Sito, Leonardo (CERN ; Naples U.) ; Rossi, Adriana (CERN) ; Bertarelli, Alessandro (CERN) ; Accettura, Carlotta (CERN) ; Carra, Federico (CERN) ; Motschmann, Fritz (CERN) ; Sterbini, Guido (CERN) ; Guardia Valenzuela, J (CERN) ; Gentini, Luca (CERN) ; Garlaschè, Marco (CERN) ; Guinchard, Michael (CERN) ; Sacristan De Frutos, Oscar (CERN) ; Hoell, Stefan (CERN) ; Papaphilippou, Yannis (CERN)
Publication	2023
Number of pages	3
In:	JACoW IPAC 2023 (2023) THPM015
In:	14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPM015
DOI	10.18429/JACoW-IPAC2023-THPM015
Subject category	Accelerators and Storage Rings
Abstract	Beam-Beam Long-Range Compensators employing current-carrying wires are considered as valuable options in hadron colliders to increase dynamic aperture at small crossing angles. This paper presents a simple design proposal for application at CERN LHC. The preliminary design allows for a certain scalability of the number of modules, current flowing in the wire, and dimensions. It complies with two key requirements: (a) the use of a thin, bare metal wire that allows for movement as near to the beam as necessary while minimising interactions with beam particles and meeting the specified DC current target; and (b) a wire support that is both an electrical insulator and a thermal conductor (ceramic).A molybdenum wire, vacuum brazed on an aluminium nitride support, is proposed, and the design is conceptually proved through the realisation and extensive test of a demonstrator device. The wire brazing validation, as well as the system's heat management, which are the most critical aspects, are given particular regard.
Copyright/License	CC-BY-4.0

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