1 / 12

Wednesday 3 August 2011

Wednesday 3 August 2011. A ‘typical’ day of LHC operation. Wednesday 3.8.2011. 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

brenna-camacho
Télécharger la présentation

Wednesday 3 August 2011

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Wednesday 3 August 2011 A ‘typical’ day of LHC operation

  2. Wednesday 3.8.2011 • 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

  3. Vacuum very good 1E-8

  4. Fill #2000 • 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

  5. Atlas Lumi per Day

  6. Atlas Luminosity and Luminosity Lifetime

  7. CMS lumi last 5 fills

  8. LHCbLumi 5 last fills

  9. Atlas Record Statistics

  10. Outlook • 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

More Related