-
Magnet families required:
-
Main
lattice circuits (bends, quads) powered to nominal
-
Crossing
angles at zero, separation bumps at zero
-
Correction circuits required
-
Orbit correctors
-
Trim quads
-
Sextupole spool pieces ON and at
nominal settings (from magnetic measurements)
-
Lattice sextupoles ON and at
nominal settings (to correct for natural chromaticity)
-
Skew quads ON and at nominal
settings (from magnetic measurements)
-
Correction circuits not required (ON and demagnetization cycle to zero
field)
-
Inner triplet multipole compensation
-
Skew
sextupoles, lattice octupoles, octupole and decapole spool
pieces.
-
Circuits
which have to be switched OFF (software interlocked)
-
Expected machine settings with this
configuration assuming "nominal cycle and wait":
-
Coupling:
-
Chromaticity (spool pieces and lattice sextupoles), assuming
about 20% error in the b3 estimate:
-
Horizontal: 0 +/- 20
-
Vertical: 0 -/+ 20
-
Chromaticity (no correction):
-
Horizontal: about -180
-
Vertical: about 0
-
Beam type: pilot
-
LHC modes: "inject and
dump" (set 10-1000 turns)
-
One
ring, single injection on demand
-
One
ring, repeated injection
-
Two rings, interleaved repeated injection
-
Cycle: nominal cycle and wait (>20
minutes after injection level is reached)
-
Occasional re-cycle (in particular during energy matching) (90
minutes)
[13]
-
Machine protection: as
for phase A.1, except for the screens.
-
Magnet
protection assumed to be fully commissioned
-
Single
pilot bunch poses no damage risk for LHC machine at 450 GeV
-
SPS
interlocking to make sure only a pilot is delivered
-
SPS
HW intensity interlock (set and tested to about 4•1010
p+)
-
SPS
Safe Beam Flag to allow extraction into empty LHC
-
SPS
extraction master BICs with logical conditions tested
-
LHC BIS must be operational, including injection BIC
-
Injection permit only if LHC beam permit loop closed
-
Critical
Settings Management MCS system to ensure that configured
settings are not corrupted or changed by unauthorised persons
-
Role
base Access RBAC to limit settings access to authorised persons
-
Beam
dump and LHC mode “Inject and Dump” allow screens to be in
beam. Here screens should be OUT and there should be an alarm or
interlock when they are IN.
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