Author: Bartmann, W.
Paper Title Page
MOPAB02 Progress in the Upgrade of the CERN PS Booster Recombination 24
 
  • J.L. Abelleira, W. Bartmann, J. Borburgh, E. Bravin, U. Raich
    CERN, Geneva, Switzerland
 
  The CERN PS Booster re­com­bi­na­tion lines (BT) will be up­graded fol­low­ing the ex­trac­tion en­ergy in­crease fore­seen in 2018 and meant to re­duce the di­rect space-charge tune shift in the PS in­jec­tion for the fu­ture HL-LHC beams. Hence­forth the main line el­e­ments, re­com­bi­na­tion septa, quadrupoles and dipoles must be scaled up to this en­ergy. An in­crease in the beam rigid­ity by a fac­tor 1.3 would re­quire the same fac­tor in the field in­te­gral of the septa, ∫Bdl, in order to bend the same angle and pre­serve the pre­sent re­com­bi­na­tion geom­e­try, which is one of the main up­grade con­straints. This paper de­scribes the new op­tics, in par­tic­u­lar in the new and longer septa. In ad­di­tion we con­sider the up­grade of the so called BTM line that brings the beam to the ex­ter­nal dump and where emit­tance mea­sure­ments are taken thanks to three pairs of grids. The new pro­posed op­tics has also the ad­van­tage to sim­plify the de­sign of the new dipoles. Here we study this new op­tics and the is­sues re­lated to the emit­tance mea­sure­ment at the new higher en­ergy.  
 
WEO4AB02 New PSB H Injection and 2 GeV Transfer to the CERN PS 320
 
  • W. Bartmann, J.L. Abelleira, B. Balhan, E. Benedetto, J. Borburgh, C. Bracco, C. Carli, G.P. Di Giovanni, V. Forte, S.S. Gilardoni, B. Goddard, G. Gräwer, K. Hanke, M. Hourican, A. Huschauer, M. Meddahi, B. Mikulec, G. Rumolo, L. Sermeus, R. Steerenberg, G. Sterbini, Z. Szoke, R. Wasef, Y. Wei, W.J.M. Weterings
    CERN, Geneva, Switzerland
 
  At CERN Linac4 is being com­mis­sioned as first step in the LHC in­jec­tor up­grade to pro­vide 160 MeV H ions. In order to fully de­ploy its po­ten­tial, the PSB con­ven­tional mul­ti­turn in­jec­tion will be re­placed by a charge ex­change in­jec­tion. An ex­pected bright­ness im­prove­ment of about a fac­tor 2 would then be dif­fi­cult to di­gest at PS in­jec­tion due to space charge. There­fore the trans­fer en­ergy be­tween PSB and PS will be in­creased at the same time from 1.4 to 2 GeV. This paper de­scribes the new PSB in­jec­tion sys­tem and the sta­tus of its test stand. Mod­i­fi­ca­tions of the PSB ex­trac­tion and re­com­bi­na­tion septa and kick­ers in the trans­fer line are shown. A new fo­cussing struc­ture for the trans­fer lines to match the hor­i­zon­tal dis­per­sion at PS in­jec­tion and the de­sign of a new eddy cur­rent sep­tum for the PS in­jec­tion are pre­sented.  
slides icon Slides WEO4AB02 [2.867 MB]