Search found 98 matches

by dukwon
Mon Apr 16, 2018 6:47 pm
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 18600

Re: 2018 Operation

Latest news is that we could see stable beams after tomorrow's morning meeting (so in about 12 hours or more)
by dukwon
Sat Apr 14, 2018 11:21 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 18600

Re: 2018 Operation

ADT tests (necessary for train injections and abort gap cleaning) have been given priority over first stable beams w/ 3b, so the latter has been pushed back to Tuesday.
by dukwon
Thu Apr 12, 2018 9:22 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 18600

Re: 2018 Operation

dashboard0.png
We have collisions!
by dukwon
Wed Apr 11, 2018 7:04 pm
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 18600

Re: 2018 Operation

First collisions (not stable beams) could be tomorrow mid-morning if loss maps and TCDI validation are performed during the night.
by dukwon
Tue Apr 10, 2018 10:02 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 18600

Re: 2018 Operation

The recommissioning is going very smoothly. Collision-finding should already take place this week, and first stable beams with 3 bunches could be as early as Monday 16th.

There will be a scrubbing run either next week or the one after.
by dukwon
Fri Mar 30, 2018 10:45 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 18600

Re: 2018 Operation

Both beams successfully circulating

https://i.imgur.com/3ef5c2g.png
by dukwon
Tue Mar 20, 2018 10:04 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 18600

Re: 2018 Operation

The short-term schedule is currently being driven by the intervention on the CMS pixel detector. Of course things are subject to change, but here are some planned milestones 22nd March: first dry run with handshakes and mode changes 27th March: TED shots 29th March: vacuum valves open around CMS, po...
by dukwon
Sun Mar 11, 2018 12:33 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 18600

2018 Operation

The LHC has been handed over to OP, and powering tests should begin Monday. If you haven't done so already, you can catch up with the slides from Chamonix while waiting for first beams: https://indico.cern.ch/event/705545/attachments/1613081/2562222/Chamonix_Summary_Fk_Bordry_7_March_2018.pdf Here's...
by dukwon
Wed Nov 15, 2017 12:55 pm
Forum: The Accelerator
Topic: 2017 Operation
Replies: 72
Views: 18077

Re: 2017 Operation

Where did you see that? In the morning meeting slides they described 16L2 as "waking up", presumably meaning losses there are starting to be a problem again.
by dukwon
Fri Oct 13, 2017 9:31 am
Forum: Science
Topic: Why Xe run
Replies: 4
Views: 2405

Re: Why Xe run

1. It's available because NA61 is doing a xenon run (they've previously done argon and beryllium)

2. By colliding different types of ion, you can measure the "system-size" dependence of various properties of quark-gluon plasma. See e.g. https://arxiv.org/abs/1301.6633
by dukwon
Thu Sep 14, 2017 6:24 pm
Forum: The Accelerator
Topic: 2017 Operation
Replies: 72
Views: 18077

Re: 2017 Operation

lumi.png
by dukwon
Tue Jun 27, 2017 10:52 am
Forum: The Accelerator
Topic: 2017 Operation
Replies: 72
Views: 18077

Re: 2017 Operation

https://indico.cern.ch/event/632309/contributions/2556444/attachments/1456855/2250118/LHCC-LHC_machine_status_report_11052017_MSolfaroli.pdf Page 19 gave a few possible 2017 scenarios with 2448b + BCMS giving higher luminosities compared to standard 2736b. It should be noted that the figure of 2448...
by dukwon
Mon Jun 26, 2017 10:56 am
Forum: The Accelerator
Topic: 2017 Operation
Replies: 72
Views: 18077

Re: 2017 Operation

2460b is not the maximum. We have seen 2820b already this year, albeit for scrubbing, and I believe the intensity ramp will end at 2556b (due to BCMS?).

Today's morning meeting slides are mostly about the losses at 16L2.

If you want daily summaries, hang around in the IRC channel.
by dukwon
Fri Jun 09, 2017 8:56 pm
Forum: The Accelerator
Topic: 2017 Operation
Replies: 72
Views: 18077

Re: 2017 Operation

lhc1.png
lhc1.png (23.01 KiB) Viewed 3637 times
About to scrub with 2820 bunches.
by dukwon
Mon Jun 05, 2017 12:00 pm
Forum: The Accelerator
Topic: 2017 Operation
Replies: 72
Views: 18077

Re: 2017 Operation