Low-Impedance Collimators for HL-LHC
| Autor: | Antipov, Sergey, Amorim, David, Bertarelli, A., Biancacci, Nicolo, Bruce, Roderik, Mereghetti, Alessio, Mirarchi, Daniele, Métral, Elias, Redaelli, Stefano, Salvant, Benoit |
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| Přispěvatelé: | Université Grenoble Alpes (UGA) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
octupole
05 Beam Dynamics and EM Fields collimation beam: stability [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph] collimator D04 Beam Coupling Impedance - Theory Simulations Measurements Code Developments 7. Clean energy Accelerators and Storage Rings Accelerator Physics operation molybdenum impedance CERN LHC Coll: upgrade surface luminosity numerical calculations |
| Zdroj: | 9th International Particle Accelerator Conference 9th International Particle Accelerator Conference, Apr 2018, Vancouver, Canada. pp.WEYGBE4, ⟨10.18429/JACoW-IPAC2018-WEYGBE4⟩ |
| DOI: | 10.18429/JACoW-IPAC2018-WEYGBE4⟩ |
| Popis: | The High-Luminosity upgrade of the Large Hadron Collider (HL-LHC) will double its beam intensity for the needs of High Energy Physics frontier. This increase requires a reduction of the machine's impedance to ensure the coherent stability of the beams until they are put in collision. A major part of the impedance is the resistive wall contribution of the collimators. To reduce this contribution several coating options have been proposed. We have studied numerically the effect of the novel coatings on the beam stability. The results show that a decrease of up to 30% of the machine impedance and a reduction of up to 120 A in the stabilizing octupole current threshold can be achieved by coating the secondary collimators with Molybdenum. Half of that improvement can be obtained by coating the jaws of a subset of four collimators identified as the highest contributors to machine impedance. The installation of this subset of low-impedance collimators is planned for the Long Shutdown 2 in 2019-2020. Proceedings of the 9th Int. Particle Accelerator Conf., IPAC2018, Vancouver, BC, Canada |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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