LHC portal

Here's the press release from 2008: https://press.cern/press-releases/2008/09/first-beam-lhc-accelerating-science CERN update from today: https://home.cern/about/updates/2018/09/large-hadron-collider-10-years-and-counting Blog post: https://cosmicshambles.com/words/blogs/jonbutterworth/big-bang-day-...

Delivered lumi so far this year:

50.0 /fb to ATLAS
51.9 /fb to CMS
1.9 /fb to LHCb
18.2 /pb to ALICE

https://home.cern/about/updates/2018/08 ... -electrons

Interview with Edda Gschwendtner, Technical Coordinator and CERN Project Leader

Level 3 evacuation alarm in all sectors due to high temperature during this fill. Fire brigade says no action required.

I guess you can't escape the heat 100 metres below the surface

The high β* run dragged on a bit too long. LHCb is back to the nominal prediction line.

Even this morning they were saying it would end today, but they put another fill in.

High β* runs are for elasitc/diffractive collisions. Stuff TOTEM and AFP/ALFA are interested in.

Here's the lumi situation as of the start of MD1:

Press release: https://press.cern/press-releases/2018/06/major-work-starts-boost-luminosity-lhc Press conference (skip to 43:00): https://webcast.web.cern.ch/event/i735865 Background to the HL-LHC: https://press.cern/backgrounders/faq-about-high-luminosity-lhc More on the civil engineering work: htt...

Global Post Mortem Event Event Timestamp: 10/06/18 21:39:22.990 Fill Number: 6773 Accelerator / beam mode: PROTON PHYSICS / STABLE BEAMS Energy: 6499200 [MeV] Intensity B1/B2: 14259 / 17073 [e^10 charges] Event Category / Classification: PROGRAMMED_DUMP / MULTIPLE_SYSTEM_DUMP First BIC input Trigge...

21:39 to 23:55 is 2 hours, 16 minutes. I believe the theoretical minimum turnaround time is about 1h45m.

8 quenches in S34. 12–15 hours to wait for cryo recovery

From what I've heard, it was shut down on purpose to do a special run for the liquid argon calorimeter. I'm not sure I believe that.

ATLAS requested the lower lumi. I'm guessing there's little point stressing the computing resources collecting high-pileup data with the magnet off. I'll try to find out what the problem with the magnet is, although I'm sure mfb will tell us soon enough.

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