Wednesday 25/07 (08:00 - 14:00) - Setting-up of the nominal cycle with LHC beam

Change of supercycle => User: LHC25

During (the scrubbing run and) the LONG MDs with LHC beam the ZS are RETRACTED / HV to 0 kV / ION TRAPS ON (inform the ZS expert). The cooling circuit for the septa magnets (circuits 214, 414 and 614) should be switched OFF (by TI). Block the fast vacuum valves OUT in the injection and extraction areas (LSS1,LSS2,LSS6)

Beam conditions: SPS user = LHC25 - PS users = LHC25A(&B)

#injections = 1  (12 bunches) - Extraction from the PS w/o QKE58

N_b = 1.3 x 10¹¹ p/b

Transverse emittances (e^* < 3 mm)

Longitudinal emittance: e_L^* = 0.35 eV.s

• Setting-up of transfer and injection (pre-requisite: verify optics settings)
• Adjust kicker timing
• Inject, establish circulating beam
• Setting-up acceleration, measure tunes and chromaticity and correct
• Check instrumentation: BPMs, BCT, Fast BCT, LHC BPM, Head-tail monitor, Wire Scanner, IPM, Tune meas

Participants: OP, RF, ABP, BI

Wednesday 25/07 (14:00 - 16:00) - Adjustment of the transverse damper

Beam conditions: SPS user = LHC25 - PS users = LHC25A&B

#injections = 1-4 (72 bunches) - Extraction from the PS w/o QKE58

N_b = 1.3 x 10¹¹ p/b

Transverse emittances (e^* < 3 mm)

Longitudinal emittance: e_L^* = 0.35 eV.s

Contact person: W. Hofle

Wednesday 25/07 (16:00 - 24:00) - PS-SPS transfer optimization (capture / flat-bottom losses)

Beam conditions: SPS user = LHC25 - PS users = LHC25A&B

#injections = 1-4 (72 bunches) - Extraction from the PS w/o QKE58

N_b = 1.3 x 10¹¹ p/b

Transverse emittances (e^* < 3 mm)

Longitudinal emittance: e_L^* = 0.35 eV.s

Contact person: E. Shaposhnikova

Thursday 25/07 (00:00 - 04:00) - Achieving nominal longitudinal beam parameters

Beam conditions: SPS user = LHC25 - PS users = LHC25A&B

#injections = 1-4 (72 bunches) - Extraction from the PS w/o QKE58

N_b = 1.3 x 10¹¹ p/b

Transverse emittances (e^* < 3 mm)

Longitudinal emittance: e_L^* = 0.35 eV.s

Contact person: T. Bohl

Thursday 25/07 (04:00 - 08:00) - Preparation of the cycles for the TT40/60 tests of week 31 (Wednesday 01/08)

Beam conditions: Supercycle change to LHCPILOT-LSS46-L16800_PDOT_V1. It is composed of 2 cycles, LHC pilot and LHC mono, called LHCPILOT_LSS4_L8400_PDOT(0->8400) and LHCPILOT_LSS6_L8400_PDOT(8400->16800) => 2 identical cycles, only the extraction is different (the first for TT40 and the second for TT60). RF MMI of LHC pilot mapped onto LHC mono. The HW compensation was done on Wednesday 18/07

#injections = 1 (1 bunch)  - Extraction from the PS w/o QKE58

N_b = 5 x 10⁹ p/b

Transverse emittances (e^* = 3 mm)

Longitudinal emittance: e_L^* = 0.3 eV.s

Contact person: J. Wenninger

Author: Elias Métral - AB/ABP
Last update: Thursday, July 19, 2007 11:35:26 PM
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