Search found 84 matches

by dukwon
Wed Oct 03, 2018 2:40 pm
Forum: The Accelerator
Topic: 2018 Operation
Replies: 73
Views: 9776

Re: 2018 Operation

Run 2 delivered luminosity so far:

ATLAS: 150.29 fb^-1
ALICE: 60.96 pb^-1
CMS: 154.26 fb^-1
LHCb: 6.38 fb^-1
by dukwon
Wed Sep 19, 2018 10:30 am
Forum: Science
Topic: Review of Lepton Flavour Universality tests in B decays
Replies: 0
Views: 2114

Review of Lepton Flavour Universality tests in B decays

Nice comprehensive summary of all of the LFU tests in B decays:

https://arxiv.org/abs/1809.06229
by dukwon
Mon Sep 10, 2018 6:41 am
Forum: The Accelerator
Topic: Tenth anniversary of first beams in the LHC
Replies: 1
Views: 220

Tenth anniversary of first beams in the LHC

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-...
by dukwon
Fri Sep 07, 2018 9:06 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 73
Views: 9776

Re: 2018 Operation

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
Lumi2018-model.png
by dukwon
Sun Aug 05, 2018 2:53 pm
Forum: The Accelerator
Topic: 2018 Operation
Replies: 73
Views: 9776

Re: 2018 Operation

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
by dukwon
Tue Jul 10, 2018 12:29 pm
Forum: The Accelerator
Topic: 2018 Operation
Replies: 73
Views: 9776

Re: 2018 Operation

The high β* run dragged on a bit too long. LHCb is back to the nominal prediction line.
by dukwon
Fri Jul 06, 2018 9:37 pm
Forum: The Accelerator
Topic: 2018 Operation
Replies: 73
Views: 9776

Re: 2018 Operation

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.
by dukwon
Sat Jun 16, 2018 9:50 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 73
Views: 9776

Re: 2018 Operation

Here's the lumi situation as of the start of MD1:
Lumi2018-model.LHCb.png
Predicted vs actual integrated lumi IP8
Lumi_20180616.png
Predicted vs actual integrated lumi IP1/5
Lumi_20180616.png (92.66 KiB) Viewed 2481 times
intLumiRunAll.png
Integrated lumi over each year so far IP8
intLumiRunAll.png (14.78 KiB) Viewed 2481 times
IntegratedLumiLHCbTime_Yearly.png
Integrated lumi over each year so far IP1/5
IntegratedLumiLHCbTime_Yearly.png (56.51 KiB) Viewed 2481 times
by dukwon
Fri Jun 15, 2018 9:20 am
Forum: The Accelerator
Topic: Start of major civil engineering work for the HL-LHC
Replies: 1
Views: 531

Start of major civil engineering work for the HL-LHC

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...
by dukwon
Wed Jun 13, 2018 1:48 pm
Forum: The Accelerator
Topic: 2018 Operation
Replies: 73
Views: 9776

Re: 2018 Operation

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...
by dukwon
Mon Jun 11, 2018 9:08 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 73
Views: 9776

Re: 2018 Operation

21:39 to 23:55 is 2 hours, 16 minutes. I believe the theoretical minimum turnaround time is about 1h45m.
by dukwon
Thu Jun 07, 2018 2:44 pm
Forum: The Accelerator
Topic: 2018 Operation
Replies: 73
Views: 9776

Re: 2018 Operation

8 quenches in S34. 12–15 hours to wait for cryo recovery :(
by dukwon
Thu Jun 07, 2018 9:14 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 73
Views: 9776

Re: 2018 Operation

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.