Author: Bracco, C.
Paper Title Page
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]  
 
THO4LR05 Transverse Emittance Preservation Studies for the CERN PS Booster Upgrade 428
 
  • E. Benedetto, C. Bracco, V. Forte, B. Mikulec, V. Raginel, G. Rumolo
    CERN, Geneva, Switzerland
  • V. Forte
    Université Blaise Pascal, Clermont-Ferrand, France
  
  As part of the LHC In­jec­tors Up­grade Pro­ject, the CERN PS Booster will un­dergo an am­bi­tious up­grade pro­gram which in­cludes the in­crease of in­jec­tion en­ergy from 50 MeV to 160 MeV and the im­ple­men­ta­tion of an H− charge-ex­change in­jec­tion from the new Linac4. Com­pared to rings char­ac­ter­ized by sim­i­lar space-charge tune spreads (about 0.5 at low en­ergy), the pe­cu­liar­ity of the PSB is the small trans­verse emit­tance that needs to be pre­served in order to pro­vide high bright­ness beams to the LHC. We here try to iden­tify what is the min­i­mum emit­tance that can be achieved for a given in­ten­sity, via mea­sure­ments, scal­ing es­ti­mates and sim­u­la­tion stud­ies. The lat­est are based on our best knowl­edge of the op­tics model and take into ac­count known per­tur­ba­tions such as the one in­duced by the short and fast ramp­ing chi­cane in­jec­tion mag­nets.  
slides icon Slides THO4LR05 [1.122 MB]