Author: Vollinger, C.
Paper Title Page
WEPAB361 New Generation CERN LHC Injection Dump - Assembly and Installation (TDIS) 3548
 
  • D. Carbajo Perez, E. Berthomé, C. Bertone, N. Biancacci, C. Bracco, G. Bregliozzi, B. Bulat, C. Cadiou, M. Calviani, G. Cattenoz, A. Cherif, P. Costa Pinto, A. Dallocchio, M. Di Castro, P. Fessia, M.I. Frankl, R. Franqueira Ximenes, J.-F. Fuchs, H. Garcia Gavela, J.-M. Geisser, L. Gentini, S.S. Gilardoni, M.A. Gonzalez De La Aleja Cabana, J.L. Grenard, J.M. Heredia, S. Joly, A. Lechner, J. Lendaro, J. Maestre, E. Page, M. Perez Ornedo, A. Perillo-Marcone, D. Pugnat, E. Rigutto, B. Salvant, A. Sapountzis, K. Scibor, R. Seidenbinder, J. Sola Merino, M. Taborelli, E. Urrutia, A. Vieille, C. Vollinger, C. Yin Vallgren
    CERN, Geneva, Switzerland
  
  Funding: Work supported by the Hilumi Project
Dur­ing CERN’s LS2, sev­eral up­grades were per­formed to beam in­ter­cept­ing de­vices in the frame­work of the HL-LHC Pro­ject. Up­graded equip­ment in­cludes two in­ter­nal beam dumps (TDIS) in­tended for ma­chine pro­tec­tion lo­cated at the in­jec­tion points from the SPS to the LHC. These two de­vices have been as­sem­bled, tested, and in­stalled around LHC Point 2 and Point 8 and are cur­rently ready to get com­mis­sioned with the beam. They are 5.8m-long, three-mod­ule-seg­mented vac­uum cham­bers, with large aper­ture to ac­com­mo­date the in­jected and cir­cu­lat­ing beam and equipped with ab­sorb­ing ma­te­ri­als, These com­prise graphite and higher Z al­loys that are em­bed­ded on sub-as­sem­blies re­in­forced with back-stiff­en­ers made of TZM. The cur­rent con­tri­bu­tion cov­ers three main mat­ters. First, it de­tails the TDIS de­sign and its key tech­ni­cal fea­tures. The sec­ond topic dis­cussed is the out­come of an ex­per­i­ment where a pro­to­type mod­ule was tested under high-en­ergy beam im­pacts at CERN’s Hi­Rad­Mat fa­cil­ity. To con­clude it is pre­sented the re­turn of ex­pe­ri­ence from the pre-se­ries con­struc­tion, val­i­da­tion and in­stal­la­tion in the LHC tun­nel. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB361  
About • paper received ※ 18 May 2021       paper accepted ※ 11 June 2021       issue date ※ 17 August 2021  
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THPAB235 Detailed Electromagnetic Characterisation of HL-LHC Low Impedance Collimators 4258
 
  • A. Kurtulus, C. Accentura, N. Biancacci, F. Carra, F. Caspers, N. Chitnis, F. Giordano, R. Illan Fiastre, S. Joly, I. Lamas Garcia, L. Mourier, E. Métral, S. Redaelli, B. Salvant, W. Vollenberg, C. Vollinger, C. Zannini
    CERN, Geneva, Switzerland
  
  The High Lu­mi­nos­ity Large Hadron Col­lider (HL-LHC) pro­ject will up­grade the LHC ma­chine to allow op­er­a­tion with in­creased lu­mi­nos­ity for the ex­per­i­ments. In order to achieve this goal, dif­fer­ent op­er­a­tional pa­ra­me­ters of the ma­chine need to be pushed be­yond the pre­sent de­sign val­ues, in­clud­ing the stored beam en­ergy. One of the main chal­lenges re­lated to the achieve­ment of the up­graded per­for­mance is the beam col­li­ma­tion sys­tem and its con­tri­bu­tion to the over­all ma­chine im­ped­ance bud­get. In this per­spec­tive, new low im­ped­ance col­li­ma­tors have been de­signed, fab­ri­cated, and in­stalled in the LHC. In this study, we will pre­sent their de­tailed elec­tro­mag­netic (EM) char­ac­ter­i­za­tion by means of radio fre­quency (RF) mea­sure­ments and EM sim­u­la­tions.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB235  
About • paper received ※ 19 May 2021       paper accepted ※ 19 July 2021       issue date ※ 10 August 2021  
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