Author: Nuiry, F.-X.
Paper Title Page
TUPAB031 Construction and Installation of the New CERN Proton Synchrotron Internal Beam Dumps 1409
 
  • K.G. Andersen, M. Calviani, A. Cherif, T. Coiffet, A. De Macedo, S. Devidal, J.-M. Geisser, S.S. Gilardoni, M.M.J. Gillet, E. Grenier-Boley, J.M. Heredia, A. Majbour, F. Monnet, M.R. Monteserin, F.-X. Nuiry, D. Pugnat, G. Romagnoli, Y.D.R. Seraphin, J.A.F. Somoza, N. Thaus
    CERN, Geneva, Switzerland
  
  In the frame­work of the CERN Large Hadron Col­lider In­jec­tors Up­grade (LIU) Pro­ject, the Pro­ton Syn­chro­tron (PS) has been equipped with two new mov­able In­ter­nal Dumps (PSID), each of them ca­pa­ble of ab­sorb­ing par­ti­cle beams of an en­ergy of up to 100 kJ. These dumps re­place the old In­ter­nal Dumps, which have been op­er­ated in the ac­cel­er­a­tor com­plex since their in­stal­la­tion in 1975 until their de­com­mis­sion­ing and re­moval from the ma­chine dur­ing the sec­ond LHC Long Shut down (LS2). This con­tri­bu­tion will ad­dress the con­struc­tion and test­ing phases of the new PSIDs, in­clud­ing the as­sem­bly of the dump core, its ac­tu­a­tion sys­tem and the re­spec­tive shield­ing, me­chan­i­cal run­ning-in tests, metrol­ogy ad­just­ments, Ul­tra-High Vac­uum (UHV) and im­ped­ance ac­cep­tance tests. The de­scribed in­stal­la­tion work was com­pleted suc­cess­fully, and the new gen­er­a­tion Dumps are cur­rently op­er­a­tional in the PS ma­chine.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB031  
About • paper received ※ 18 May 2021       paper accepted ※ 27 May 2021       issue date ※ 26 August 2021  
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WEPAB368 Sigraflex® Studies for LHC CERN Beam Dump: Summary and Perspective 3571
 
  • J.M. Heredia, M. Calviani, R. Franqueira Ximenes, D. Grenier, K. Kershaw, A. Lechner, P. Andreu-Muñoz, F.-X. Nuiry, A. Perillo-Marcone, V. Rizzoglio, C. Torregrosa
    CERN, Meyrin, Switzerland
  • A. Alvaro
    SINTEF, Trondheim, Norway
  • F. Berto, S. Solfiti
    NTNU, Trondheim, Norway
  
  The Large Hadron Col­lider (LHC) beam dump (TDE) is es­sen­tial for safe and re­li­able op­er­a­tion of the col­lider. It ab­sorbs par­ti­cles ex­tracted from the ac­cel­er­a­tor when­ever re­quired. The orig­i­nal de­sign of the TDE dates from the mid 2000 and it is con­sti­tuted of an eight-me­ter-long cylin­dri­cal stain­less-steel tube, filled with low-Z car­bon-based ma­te­ri­als from dif­fer­ent grades and den­si­ties. The Sigraflex®, an ex­panded low-den­sity graphite, is em­ployed in the mid­dle sec­tion of the TDE core. Due to un­ex­pected be­hav­iour ob­served in the past LHC runs, sev­eral major up­grades were re­cently im­ple­mented in order for the TDE to be ready for LHC Run3 (2021-2024), where up to 555 MJ beam en­ergy is ex­pected to be dumped every few hours. Ac­cord­ing sim­u­la­tions, tem­per­a­tures in the Sigraflex core will reach lo­cally up to 1500°C in the reg­u­lar dump cases, and above 2300°C for fail­ure sce­nar­ios. The ob­jec­tive of this con­tri­bu­tion is to sum­ma­rize the LS2 hard­ware up­grades and the plan for the eval­u­a­tion of the Sigraflex per­for­mance dur­ing LHC Run3. This work will also de­tail the last ex­per­i­men­tal and nu­mer­i­cal find­ings ap­plied to the Sigraflex®, and pos­si­ble al­ter­na­tive ma­te­ri­als for the fu­ture.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB368  
About • paper received ※ 18 May 2021       paper accepted ※ 11 August 2021       issue date ※ 16 August 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)