• M.J. Barnes, L. Ducimetière, B. Goddard, C. Heßler, V. Mertens, J.A. Uythoven
  CERN, Geneva

Pro­ton and ion beams will be in­ject­ed into LHC at 450 GeV by two kick­er mag­net sys­tems, pro­duc­ing mag­net­ic field puls­es of up to 7.8 μs flat top du­ra­tion with rise and fall times of not more than 900 ns and 3 μs, re­spec­tive­ly. Both sys­tems are com­posed of four trav­el­ing wave kick­er mag­nets, pow­ered by pulse form­ing net­works. One of the strin­gent de­sign re­quire­ments of these sys­tems is a field flat top and post pulse rip­ple of less than ±0.5 %. A care­ful­ly matched high band­width sys­tem is re­quired to ob­tain the strin­gent pulse re­sponse. Screen con­duc­tors are placed in the aper­ture of the kick­er mag­net to pro­vide a path for the image cur­rent of the, high in­ten­si­ty, LHC beam and screen the fer­rite against Wake fields: these con­duc­tors af­fect the field pulse re­sponse. Re­cent in­jec­tion tests pro­vid­ed the op­por­tu­ni­ty to di­rect­ly mea­sure the shape of the kick field pulse with high ac­cu­ra­cy using a pilot beam. This paper de­tails the mea­sure­ments and com­pares the re­sults with pre­dic­tions and lab­o­ra­to­ry mea­sure­ments.

• C. Heßler, W. Bartmann, M. Benedikt, B. Goddard, M. Meddahi, J.A. Uythoven
  CERN, Geneva

With­in the scope of the LHC in­jec­tor up­grade, it is pro­posed to re­place the pre­sent in­jec­tor chain by new ac­cel­er­a­tors, Linac4, SPL and PS2, for which new beam trans­fer lines are re­quired. The beam prop­er­ties and re­quire­ments for each of the lines are sum­ma­rized. The orig­i­nal de­sign of the beam lines has been fully re­con­sid­ered due to the very de­mand­ing con­straints on the beam line lay­outs at the PS2 in­jec­tion / ex­trac­tion re­gions and a new straight sec­tion of the PS2 which led to a much im­proved beam line ge­om­e­try. The rel­e­vant mod­i­fi­ca­tions and op­tics de­signs are de­scribed and a pre­lim­i­nary spec­i­fi­ca­tion of the beam line equip­ment is also given.

• W. Bartmann, B. Goddard, C. Heßler
  CERN, Geneva

A new de­sign of the in­jec­tion-ex­trac­tion straight sec­tion for PS2 has been made, mo­ti­vat­ed by prob­lem­at­ic in­ter­sec­tions of the PS2 trans­fer lines, po­ten­tial gain in drift length for the beam trans­fer sys­tems and re­duc­tion of the total straight sec­tion length. The new straight con­tains two in­jec­tion sys­tems with sep­a­rate beam lines and three ex­trac­tion sys­tems to the SPS shar­ing a sin­gle beam line, to­geth­er with an ex­tract­ed "waste" beam from the H^- in­jec­tion with its line to a beam dump. A sym­met­ric dou­blet struc­ture was cho­sen, with a re­duced num­ber of cells and quadrupoles. The op­tics so­lu­tions are de­scribed and the match­ing and tun­ing flex­i­bil­i­ty in­ves­ti­gat­ed. The im­pli­ca­tions for the dif­fer­ent in­jec­tion and ex­trac­tion sys­tems and trans­fer lines will be dis­cussed, to­geth­er with the spe­cif­ic is­sues of in­te­gra­tion into the over­all lat­tice.

• C. Heßler, B. Goddard, M. Meddahi
  CERN, Geneva

The High Ra­di­a­tion to Ma­te­ri­als fa­cil­i­ty - there­after Hi­Rad­Mat - is de­signed to allow test­ing of ac­cel­er­a­tor com­po­nents, in par­tic­u­lar those of the LHC and its in­jec­tors, with the im­pact of high-in­ten­si­ty pulsed beams. The fa­cil­i­ty is cur­rent­ly under con­struc­tion, as an ap­proved CERN pro­ject. The in­stal­la­tion of the ded­i­cat­ed pri­ma­ry beam line and ex­per­i­men­tal area is planned dur­ing the 2010-2011 CERN ac­cel­er­a­tor tech­ni­cal shut­down. It will be ready for users after com­mis­sion­ing and some ini­tial run­ning in Oc­to­ber 2011. A de­tailed pro­ton beam line de­sign has been per­formed in order to ful­fill the beam pa­ram­e­ter spec­i­fi­ca­tion, in par­tic­u­lar the de­mand­ing op­tics flex­i­bil­i­ty at the test stand lo­ca­tion. The stud­ies pre­sent­ed in­clude tra­jec­to­ry cor­rec­tion and aper­ture stud­ies as well as spec­i­fi­ca­tions of mag­net­ic sys­tems, power con­vert­ers, beam in­stru­men­ta­tion and vac­u­um sys­tems.