TUAN3

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URL	https://doi.org/10.18429/JACoW-IPAC2024-TUAN3
Title	Understanding of the LHC warm vacuum module heating
Authors	P. Krkotic, V. Baglin, P. Chiggiato, Y. Papaphilippou, G. Rumolo, C. Antuono, G. Bregliozzi, S. Calatroni, E. de la Fuente, L. Giacomel, B. Salvant, C. Zannini European Organization for Nuclear Research A. Galloro University of Calabria L. Sito University of Napoli Federico II O. Santos
Abstract	During the third run of the Large Hadron Collider in 2023, which had the highest intensity bunch population compared to previous runs, increased losses attributed to pressure spikes within a warm vacuum sector triggered a beam dump. Subsequent inspections revealed localised annealing and plasticisation of the tension spring in the sliding contact radio-frequency finger module, alongside traces of vapour deposition on the various module components with the stainless-steel spring material. A comprehensive analysis involving vacuum and beam impedance studies was conducted to investigate the triggering mechanisms behind the radio-frequency finger module failure. The findings indicate localised beam-induced heating, which could lead to the annealing of the spring with a consequent cascade of effects. Additionally, investigations of potential mitigation measures were performed.
Paper	download: TUAN3.pdf
Cite	BibTeX, LaTeX, Text/Word, RIS, EndNote
Conference	15th International Particle Accelerator Conference
Series
Location	Nashville, TN
Date	19-24 May 2024
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Fulvia Pilat - Oak Ridge National Laboratory Wolfram Fischer - Brookhaven National Laboratory Robert Saethre - Oak Ridge National Laboratory Petr Anisimov - Los Alamos National Laboratory Ivan Andrian - Elettra-Sincrotrone Trieste S.C.p.A.
Online ISBN	978-3-95450-247-9
Online ISSN	2673-5490
Received	14 May 2024
Revised	22 May 2024
Accepted	22 May 2024
Issued	01 July 2024
DOI	10.18429/JACoW-IPAC2024-TUAN3
Pages	947-950
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.