Thursday 08/11 (08:00 - 09:00) - Accesses in PS and TT2

Thursday 08/11 (09:00 - 13:00) - Setting-up of the nominal (4 times 72 bunches) 25 ns LHC beam in the SPS (both transverse and longitudinal) until 270 GeV/c

Change of supercycle => LHCMD25.92-55-270_PDOT_V2 (31.2 s long) => Please try and prepare the supercycle during the preceding shift!

Timing sequence Name => LHC25NS-w/coast-0/1/3

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)

Equipment modifications for the MD:
- Changed accelerator mode for FT: no extraction 
- NORTH extraction off
- MST/MSE girders retracted
- Servo off
- Switched off TT20 AUXPS

Beam conditions: PSB users = LHC25A and LHC25B / PS user = LHC25 / SPS user = LHC25NS (RF MMI pointing to LHC25NS => See below how to do this)

RF MMI pointing to LHC25NS (method):

            - Working Sets

            - RF-MMI => SPS-MMI

            - Select context => SPS.USER.LHC25NS

            - View => Show devices description

- MMI target LHC25NS => Enabled and MMI target "previous one" => Disabled. To be done 2 times as it appears 2 times in the list

- Delay has to be set to 550

#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

• 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
• Adjust the transverse dampers at both 26 GeV/c and 55 GeV/c
• Check instrumentation: BPMs, BCT, Fast BCT, LHC BPM, Head-tail monitor, Wire Scanner, IPM, Tune meas
• Test coast at 270 GeV/c

Participants: OP, RF, ABP, BI

Thursday 08/11 (13:00 - 13:30) - Study for the LHC BLMs

Contact person: C. Zamantzas

Thursday 08/11 (13:30 - 16:00) - Study of the effect of energy (and transverse beam emittances) on the electron cloud vertical fast instability at 55 GeV/c

Beam conditions: PSB users = LHC25A&B / PS user = LHC25 / SPS user = LHC25NS (RF MMI pointing to LHC25NS)

#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: G. Rumolo

Thursday 08/11 (16:00 - 20:00) - SPS-LHC re-phasing on the flat-top at 270 GeV/c

Beam conditions: PSB users = LHC25A&B / PS user = LHC25 / SPS user = LHC25NS (RF MMI pointing to LHC25NS)

#injections = 1-4 (12 and/or 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: P. Baudrenghien

Thursday 08/11 (20:00 - 24:00) - Beam stability in double harmonic RF system

Beam conditions: PSB users = LHC25A&B / PS user = LHC25 / SPS user = LHC25NS (RF MMI pointing to LHC25NS)

#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^* = 0.3 eV.s

Coast at 270 GeV/c

Contact person: E. Shaposhnikova

Friday 09/11 (00:00 - 04:00) - Q' measurements for LHC

Beam conditions: PSB users = LHC25A&B / PS user = LHC25 / SPS user = LHC25NS (RF MMI pointing to LHC25NS)

#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^* = 0.3 eV.s

Coast at 270 GeV/c

Contact person: R. Steinhagen

Friday 09/11 (04:00 - 08:00) - BBLR measurements in the SPS at 55 GeV/c

Beam conditions: PSB users = LHC25A&B / PS user = LHC25 / SPS user = LHC25NS (RF MMI pointing to LHC25NS)

#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^* = 0.3 eV.s

Contact person: F. Zimmermann

Author: Elias Métral - AB/ABP
Last update: Tuesday, November 06, 2007 04:29:10 PM
Copyright CERN