Search found 97 matches

by dukwon
Fri Jun 21, 2019 8:38 am
Forum: The Accelerator
Topic: The ULO
Replies: 1
Views: 2832

The ULO

For those unaware, ever since the start of Run 2 there has been an object lying on the bottom of the beam pipe in sector 81. It was detected in aperture scans and nicknamed the "Unidentified Lying Object" (ULO). There was some discussion here when it was first detected: http://www.lhcportal.com/Foru...
by dukwon
Wed Feb 13, 2019 7:27 am
Forum: ATLAS
Topic: 35c3 talk: "Conquering Large Numbers at the LHC"
Replies: 1
Views: 926

35c3 talk: "Conquering Large Numbers at the LHC"

ATLAS physicists talk about data acquisition, processing and analysis to an audience of non-physicists. Much of what they say applies to other collider experiments, too.

https://media.ccc.de/v/35c3-9851-conque ... at_the_lhc
by dukwon
Tue Jan 15, 2019 5:40 pm
Forum: Off topic
Topic: FCC CDR released
Replies: 3
Views: 1005

Re: FCC CDR released

Diagram of the location and local rock types:
by dukwon
Tue Jan 15, 2019 3:47 pm
Forum: Off topic
Topic: FCC CDR released
Replies: 3
Views: 1005

FCC CDR released

by dukwon
Tue Dec 04, 2018 9:14 am
Forum: The Accelerator
Topic: LS2 and looking ahead to Run 3
Replies: 5
Views: 1421

Re: LS2 and looking ahead to Run 3

First night of LS2, violent thunderstorm caused extensive power cuts. The fire brigade had a busy night.
by dukwon
Mon Dec 03, 2018 6:53 am
Forum: The Accelerator
Topic: LS2 and looking ahead to Run 3
Replies: 5
Views: 1421

Re: LS2 and looking ahead to Run 3

Screenshot from 2018-12-03 07-52-39.png
Screenshot from 2018-12-03 07-52-39.png (2.84 KiB) Viewed 951 times
by dukwon
Mon Dec 03, 2018 6:06 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 17343

Re: 2018 Operation

Screenshot from 2018-12-03 07-05-49.png
by dukwon
Sun Dec 02, 2018 4:12 pm
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 17343

Re: 2018 Operation

That's it. With the beam dump just now, we are done with Stable Beams for Run 2. Now we have some MDs overnight and Run 2 will be completely over at 6am.
by dukwon
Fri Nov 30, 2018 7:57 pm
Forum: Off topic
Topic: you know the RHIC
Replies: 2
Views: 501

Re: you know the RHIC

I believe the absolute maximum beam energy is 255 Z GeV where Z is charge of the ion (atomic number for fully ionised nuclei). "Full energy" is 100 GeV per nucleon, but bear in mind Z/A < 1/2 for almost all nuclides.
by dukwon
Mon Oct 29, 2018 9:12 am
Forum: New Users Start Here
Topic: hello to all
Replies: 0
Views: 773

Re: hello to all

Welcome!
by dukwon
Thu Oct 25, 2018 2:38 pm
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 17343

Re: 2018 Operation

For Run1+Run2

187 /fb for ATLAS
192 /fb for CMS
10 /fb for LHCb

The page shows a buggy number for ALICE unfortunately

https://acc-stats.web.cern.ch/acc-stats ... view-panel

(remember to filter by proton-proton and stable beams)
by dukwon
Wed Oct 03, 2018 2:40 pm
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 17343

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: 2808

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