Abstract

In view of the High-Luminosity upgrade of the Large Hadron Collider (LHC) collimation system, a family of novel molybdenum-carbide graphite (MoGr) composites was developed to meet the challenging requirements of HL-LHC beam-halo collimation, in particular the electrical conductivity and thermo-mechanical performances. The Ultra-High Vacuum (UHV) behaviour of this material was extensively characterized to assess its compatibility with the accelerator’s specifications. The results presented in this paper correlate the outgassing behaviour with the microscopic features of MoGr compared to other graphite-based materials. Residual gas analysis (RGA) was exploited to optimize post-production treatments.

Details

Title
Ultra-High Vacuum characterization of Molybdenum-Carbide Graphite for HL-LHC collimators
Author
Accettura, C 1 ; Beghi, M 2 ; Bertarelli, A 3 ; Bregliozzi, G 3 ; Carra, F 3 ; Cattenoz, G 3 ; Guardia-Valenzuela, J 4 ; Redaelli, S 3 ; Taborelli, M 3 

1  CERN, Route de Meyrin 385, 1217 Meyrin, Switzerland; Politecnico di Milano, Milan, Italy 
2  Politecnico di Milano, Milan, Italy 
3  CERN, Route de Meyrin 385, 1217 Meyrin, Switzerland 
4  CERN, Route de Meyrin 385, 1217 Meyrin, Switzerland; Universidad de Zaragoza, Zaragoza, Spain 
Publication year
2019
Publication date
Nov 2019
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1088/1742-6596/1350/1/012085
ProQuest document ID
2568083534
Copyright
© 2019. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.