Article Dans Une Revue Coatings Année : 2020

Resistivity Characterization of Molybdenum-Coated Graphite-Based Substrates for High-Luminosity LHC Collimators

Accettura Carlotta
  • Fonction : Auteur
Antipov Alekseyevich Sergey
  • Fonction : Auteur
Baris Adrienn
  • Fonction : Auteur
Bertarelli Alessandro
  • Fonction : Auteur
Biancacci Nicolò
  • Fonction : Auteur
Calatroni Sergio
  • Fonction : Auteur
Carra Federico
  • Fonction : Auteur
Caspers Fritz
  • Fonction : Auteur
García-Tabarés Valdivieso
  • Fonction : Auteur
Guardia Valenzuela
  • Fonction : Auteur
Kurtulus Adnan
  • Fonction : Auteur
Mereghetti Alessio
  • Fonction : Auteur
Métral Elias
  • Fonction : Auteur
Redaelli Stefano
  • Fonction : Auteur
Salvant Benoit
  • Fonction : Auteur
Taborelli Mauro
  • Fonction : Auteur
Vollenberg Wilhelmus
  • Fonction : Auteur

Résumé

The High-Luminosity Large Hadron Collider (HL-LHC) project aims at extending the operability of the LHC by another decade and increasing by more than a factor of ten the integrated luminosity that the LHC will have collected by the end of Run 3. This will require doubling the beam intensity and reducing the transverse beam size compared to those of the LHC design. The higher beam brightness poses new challenges for machine safety, due to the large energy of 700 MJ stored in the beams, and for beam stability, mainly due to the collimator contribution to the total LHC beam coupling impedance. A rich research program was therefore started to identify suitable materials and collimator designs, not only fulfilling impedance reduction requirements but also granting adequate beam-cleaning and robustness against failures. The use of thin molybdenum coatings on a molybdenum–graphite substrate has been identified as the most promising solution to meet both collimation and impedance requirements, and it is now the baseline choice of the HL-LHC project. In this work we present the main results of the coating characterization, in particular addressing the impact of coating microstructure on the electrical resistivity with different techniques, from Direct Current (DC) to GHz frequency range.

Dates et versions

hal-02557674 , version 1 (28-04-2020)

Identifiants

Citer

Accettura Carlotta, Amorim David, Antipov Alekseyevich Sergey, Baris Adrienn, Bertarelli Alessandro, et al.. Resistivity Characterization of Molybdenum-Coated Graphite-Based Substrates for High-Luminosity LHC Collimators. Coatings, 2020, 10 (4), pp.361. ⟨10.3390/coatings10040361⟩. ⟨hal-02557674⟩
93 Consultations
0 Téléchargements

Altmetric

Partager

  • More