Author: Schoofs, J.
Paper Title Page
WEC2C1 Evaluation of Power Deposition in HL-LHC with Crystal-assisted Heavy Ion Collimation 236
 
  • V. Rodin, R. Bruce, R. Cai, M. D’Andrea, L.S. Esposito, A. Lechner, J.B. Potoine, S. Redaelli, J. Schoofs
    CERN, Meyrin, Switzerland
  • R. Cai
    EPFL, Lausanne, Switzerland
  • J.B. Potoine
    IES, Montpellier, France
 
  The future LHC heavy-ion program, utilizing 208Pb82+ beams at up to 7 Z TeV, is anticipated to operate with substantial intensity upgrade. During periods of short beam lifetime, a potential performance limitation may arise from secondary ions produced by electromagnetic dissociation and hadronic fragmentation in the collimators of the betatron cleaning insertion. These off-rigidity fragments risk quenching superconducting magnets when they are lost in the dispersion suppressor. To address this concern, an alternative collimation scheme will be introduced for forthcoming heavy ion runs, employing bent channeling crystals as primary collimators. In this contribution, we detail a thorough study of power deposition levels in superconducting magnets through FLUKA shower simulations in the crystal-based collimation system. The study focuses on the downstream dispersion suppressor regions of the betatron cleaning insertion, where the quench risk is the highest. Based on this work, we quantify the expected quench margin in future runs with 208Pb82+ beams, providing crucial insights for the successful execution of the upgraded heavy-ion program at the HL-LHC.
Research supported by the HL-LHC project.
 
slides icon Slides WEC2C1 [3.105 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-HB2023-WEC2C1  
About • Received ※ 24 November 2023 — Revised ※ 25 November 2023 — Accepted ※ 29 November 2023 — Issued ※ 16 January 2024
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