PS BOOSTER M. Chanel

1
PS BOOSTERM. Chanel

• PPC 3 décembre 1999

2
OPERATION

• Lead Ions ok but not top perf. due to vacuum not
  as good as last year.
• AD beam ok but still pb synchro should be solved
  next year together with diagnostics.

3
MD ON PSB

• HOLLOW BEAM Applied to
• LHC type beams,4 PSB rings, no improvement for
  the nominal LHC beam.
• Firsts tries for TOF beam, seems to give less
  losses in PS.
• Some pb to maintain bunch flatness for long time
  to be understood.
• à suivre.
• LHC initial beam neededexit PS0.8mm,1.4 1012
  2 batches PSB1.75 1011/ring)
• Achieved in PS 1 batch,1 1012, (ehev)/2 lt0.6mm
  after filamentation on injection flat bottom.

4
MD PSB (suite)

• Tries to compensate Qv5(integer resonance)
• excited by dipoles(Qv5), quads(2 Qv10), Skew
  sext(3 Qv15)...
• dipole, quad compensations on ring 2.
• switch off XSks(3 Qv16)
• double traversal(coherent) see pict.
• With Qv5.26, high space charge 5 to10 more
  beam(see pict.)