2018 Operation

The place to discuss the LHC. Commissioning, operation, issues, events ....
andrewp
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Re: 2018 Operation

Post by andrewp » Tue Jun 12, 2018 5:09 am

22:32 to 23:55 I believe?

dukwon
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Re: 2018 Operation

Post by dukwon » Wed Jun 13, 2018 1:48 pm

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 Triggered: First USR_PERMIT change: Ch 1-Programable Dump b1: B T -> F on CIB.CCR.LHC.B1
At 22:32 they only dumped some probes

andrewp
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Re: 2018 Operation

Post by andrewp » Wed Jun 13, 2018 7:45 pm

Ah OK tnx. MD currently...

dukwon
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Re: 2018 Operation

Post by dukwon » Sat Jun 16, 2018 9:50 am

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

jlourenc
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Re: 2018 Operation

Post by jlourenc » Fri Jul 06, 2018 5:22 pm

Hi

How long do they plan to keep doing 90m?
And does anyone have any insights as to why 90m good is? Will this help some specific decay channel?
Thanks
Joao

dukwon
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Re: 2018 Operation

Post by dukwon » Fri Jul 06, 2018 9:37 pm

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.

dukwon
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Re: 2018 Operation

Post by dukwon » Tue Jul 10, 2018 12:29 pm

The high β* run dragged on a bit too long. LHCb is back to the nominal prediction line.
Attachments
Lumi_20180710.png
Lumi_20180710.png (91.38 KiB) Viewed 2244 times

andrewp
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Re: 2018 Operation

Post by andrewp » Sun Jul 22, 2018 12:16 am

:clap: A whole 1/fb within 24 hrs!

dukwon
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Re: 2018 Operation

Post by dukwon » Sun Aug 05, 2018 2:53 pm

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

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DCWhitworth
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Re: 2018 Operation

Post by DCWhitworth » Mon Aug 06, 2018 7:19 am

So much for it being the coldest known place in the universe ;)
DC

The LHC - One ring to rule them all !

andrewp
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Re: 2018 Operation

Post by andrewp » Fri Aug 24, 2018 5:53 pm

Getting 1.0/fb daily is achievable, but only with initial lumi in excess of 20,000. This used to be achievable, but apparently no more. What's the problem?

dukwon
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Re: 2018 Operation

Post by dukwon » Fri Sep 07, 2018 9:06 am

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

jmc2000
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Re: 2018 Operation

Post by jmc2000 » Thu Sep 13, 2018 11:45 pm

135th LHCC meeting https://indico.cern.ch/event/744723/

From page 19 there's been some cryogenic issues as far back as June and July with the failure of two compressors. These will be replaced in TS2 removing the current limitations.

Jmc

dukwon
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Re: 2018 Operation

Post by dukwon » Wed Oct 03, 2018 2:40 pm

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

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