2011-08-02LHC 8:30 meeting EBH 11

A ‘typical’ day of LHC operation

Wednesday 3 August 2011

2011-08-02LHC 8:30 meeting EBH 2

6:36 Fill #1999 dumped by power glitch (detected by FMCM)

8:43 back in Stable beams Fill #2000 (2:07 hours) Beam intensity: 1.615E14 Bunch intensity: 1.17E11 Atlas max. luminosity: ~2 Hz/nb Emittance into collision: ~1.9 um Beam lifetime >50 hours Programmed dump at 6:16 after 21:32 hours of stable

beams

Wednesday 3.8.2011

2011-08-02LHC 8:30 meeting EBH 3

2011-08-02LHC 8:30 meeting EBH 4

Vacuum very good

1E-8

2011-08-02LHC 8:30 meeting EBH 5

Damper module H2B2 tripped - switch back on Reboot of cfv-ua47-bctfra to re-establish BCT reading Experiment could not fully profit:

CMS: problems with cooling water solved by 19:30 + recovering time. (stopped data taking from 11:45 – 2:30)

LHCb 3:30 both planes optimized drop below target lumi 4:50 electrical alarm which could not be reset stop

taking data Total integrated lumi collected:

ATLAS 90.4 pb-1 CMS ≈25 pb-1 LHCb 25.8 pb-1 ALICE 0.15 pb-1

Fill #2000

2011-08-02LHC 8:30 meeting EBH 6

Atlas Lumi per Day

2011-08-02LHC 8:30 meeting EBH 7

2011-08-02LHC 8:30 meeting EBH 8

Atlas Luminosity and Luminosity Lifetime

2011-08-02LHC 8:30 meeting EBH 9

CMS lumi last 5 fills

2011-08-02LHC 8:30 meeting EBH 11

LHCb Lumi 5 last fills

2011-08-02LHC 8:30 meeting EBH 13

Atlas Record Statistics

2011-08-02LHC 8:30 meeting EBH 14

7:10 injecting probe beam Beam intensity: 1.68E14 Bunch intensity: ~1.22E11

Intervention in the PS (switching back to POPS power supply) Intended to start 9:00 and last for 6-8 hours

keep the current fill #2001 in the LHC

Should we loose the fill Access

‘adiabatically’ increase beam intensity

Outlook