Week 19 -
Long SPS MD
Monday 9/5/2011 and Wednesday 11/5/2011 during LHC
Technical Stop
Monday 08h00 - 18h00
Supercycle:
fully dedicated MD
MD title:
Setting-up
of the damper and optimization of longitudinal parameters along the cycle
Beam conditions:
LHC 25ns beam, one or two batch, intensity per bunch 1.2e11
Cycle:
LHCMD_25ns_2011_V1, 18bp
PSB user = LHC_MD_A + LHC_MD_B (up to 2 SPS injections)
PS cycle = LHC25
PS timing user = MD6
SPS user = LHCMD1
RF MMI target = LHCMD3
Contact People: T. Bohl, W. Hofle, D. Valuch
Additional remarks:
Monday 18h00 - Tuesday 05h00
Supercycle:
total 36bp, made of
two long flat
bottom LHC cycles, one nominal optics and the other one low gamma transition
MD title:
Electron cloud measurements:
efficiency of clearing electrodes and RGA between StSt liners
Beam conditions: 1-4
batches of 25ns beam with nominal intensity per bunch (1.2e11)
Cycle:
LHCMD_25ns_2011_V1, 18bp
PSB user = LHC_MD_A + LHC_MD_B
PS cycle = LHC25
PS timing user = MD6
SPS user = LHCMD1
RF MMI target = LHCMD3
Contact Person: G. Rumolo, E. Shaposhnikova, M. Taborelli, C. Yin-Vallgren, BE/BI, TE/ABT
Additional remarks: Scan of magnetic field to check the dependence of the efficiency of the
clearing electrode, possible checks of beam instrumentation (wire scanners, fBCT),
monitor kicker heating/outgassing, ZS outgassing
Some pre-requisites (taken from 2010 operation):
- The interlock threshold on the temperature of the MKE kickers can be
raised? (check with Karel)
- With LHC beam the ZS should be RETRACTED / HV to 20 kV / ION TRAPS ON
(the ZS expert must be informed). At the end of the MD Ht conditioning should be
foreseen before applying back the HV to its nominal value (check with ZS
experts)
- The cooling circuit for the septa magnets (circuits 214, 414 and 614)
should be switched OFF (by TI from the CCC).
- The fast vacuum valves in the injection and extraction areas (LSS1,
LSS2, LSS4 and LSS6) should be blocked OUT (by Tony Mongelluzzo, 165116)
- The magnets with the e-cloud monitors are 4 dipoles: MDHW51832, 51836,
51838, 51853, all nominally with 0.12 T (setting of MDHW51832 to 25 A), but this
value can be scanned during the MD
MD title:
Set up of single bunch on long low
gamma transition cycle and emittance evolution
Beam conditions: single
bunch with intensity up to nominal (1.2e11)
Cycle: LHCMD_25ns_Q20_2011_V1, 18bp
PSB user = LHCINDIV or MD4
PS timing user = LHCINDIV or MD8
PS cycle = LHCINDIV
SPS user = LHCFAST3
RF MMI target = MD2
Contact Person: H. Bartosik, Y. Papaphilippou, B. Salvant
Additional remarks:
Tuesday 05h00 - Wednesday 08h00
Cool down + INJECTOR TECHNICAL STOP
If the beam becomes already available in the night between Tuesday and Wednesday:
Supercycle:
one LHC cycle for 50ns single batch +
2 CNGS
MD title:
Electron cloud with larger
emittance 50ns beams up to the ultimate intensity
Beam conditions:
LHC 50ns beam with single batch PSB-PS transfer, 1-4 batches, intensity per
bunch up to 1.7e11
Cycle: LHCMD_50ns_S_2011_V1,
15bp
PSB user = LHC_A
PS timing user = LHC
PS cycle = LHC_50
SPS user = LHCMD2
RF MMI target = LHCMD2
Contact People: G. Rumolo, E. Shaposhnikova, M. Taborelli, C. Yin-Vallgren
Additional remarks:
Wednesday 08h00 - 18h00
Supercycle:
total 36bp, made of two long flat bottom LHC cycles, one
nominal optics and the other one low gamma transition
MD title:
Electron cloud with low
emittance 50ns beams up to the highest intensity
Beam conditions:
LHC 50ns beam with double batch PSB-PS transfer, 1-4 batches, intensity per
bunch as much as the PS can deliver on cycle
LHCMD_50ns_D_2011_V1, 18bp
PSB user = LHC_MD_A + LHC_MD_B
PS timing user = LHC_MD
PS cycle = LHC_DB_50
SPS user = LHCMD1
RF MMI target = LHCMD1
Contact People: G. Rumolo, E. Shaposhnikova, M. Taborelli, C. Yin-Vallgren
Additional remarks:
MD title:
Set up of single bunch on long low
gamma transition cycle and emittance evolution
Beam conditions: single
bunch with intensity up to nominal (1.2e11)
Cycle: LHCMD_25ns_Q20_2011_V1, 18bp
PSB user = LHCINDIV or MD4
PS timing user = LHCINDIV or MD8
PS cycle = LHCINDIV
SPS user = LHCFAST3
RF MMI target = MD2
Contact Person: H. Bartosik, Y. Papaphilippou, B. Salvant
Additional remarks:
Wednesday 18h00 - Thursday 06h00
Supercycle:
one LHC cycle for 50ns single batch +
2 CNGS
MD title:
Electron cloud with larger
emittance 50ns beams up to the ultimate intensity
Beam conditions:
LHC 50ns beam with single batch PSB-PS transfer, 1-4 batches, intensity per
bunch up to 1.7e11
Cycle: LHCMD_50ns_S_2011_V1,
15bp
PSB user = LHC_A
PS user = LHC
PS cycle = LHC_50
SPS user = LHCMD2
RF MMI target = LHCMD2
Contact People: G. Rumolo, E. Shaposhnikova, M. Taborelli, C. Yin-Vallgren
Additional remarks:
Thursday 06h00 - Thursday 08h00
Recovery from MD and switch back to physics
Back to the Injector MD home page
Author: Giovanni
Rumolo BE-ABP-ICE
Last update:
Monday, May 09, 2011 10:31:38 AM
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CERN