Search found 160 matches

by jmc2000
Fri Oct 02, 2015 9:38 pm
Forum: The Accelerator
Topic: What are the current records for LHC fills?
Replies: 45
Views: 90253

What are the current records for LHC fills?

Is there a page that records current records for LHC fills?

In particular, I'm looking for records of: 1. max instantaneous luminosity, 2. Max integrated luminosity over (a)one fill (b)one day, (c) one week 3. Max time for one fill

Cheers,

jmc2000
by jmc2000
Fri Sep 11, 2015 8:58 pm
Forum: The Accelerator
Topic: 2014 machine commissioning and 2015 start up
Replies: 59
Views: 158298

Re: 2014 machine commissioning and 2015 start up

Fill #4349 with 745 25ns bunches is currently still looking beautifully stable with low losses after 4 hours: impressive! Should mean at least around 0.5 fb/week from now on, possibly matching 1 fb/week in 2012 by the end of the year! Does anyone know the number of bunches and Beta* they're going to...
by jmc2000
Mon Jul 27, 2015 11:59 pm
Forum: The Accelerator
Topic: 2014 machine commissioning and 2015 start up
Replies: 59
Views: 158298

Re: 2014 machine commissioning and 2015 start up

Does 25ns scrubbing also involve machine development at the same time that will ultimately aid the intensity ramp up?

Regards

jmc
by jmc2000
Tue Jul 14, 2015 10:27 pm
Forum: The Accelerator
Topic: Luminosity targets for 2015
Replies: 1
Views: 5318

Re: Luminosity targets for 2015

The luminosity target was 10fb, but at the last LHCC meeting was seen as "challenging" and changed to 5-10fb.

https://indico.cern.ch/event/389857/ses ... June15.pdf

Regards,

JMc
by jmc2000
Mon Jun 01, 2015 9:22 pm
Forum: The Accelerator
Topic: 2014 machine commissioning and 2015 start up
Replies: 59
Views: 158298

Re: 2014 machine commissioning and 2015 start up

And yesterday we had collisions with a beta of 80 cm. The beta is a measurement for the focus of the beam. If they say "we are at 80 cm", they mean "the beta is 80 cm at the collision points". The lower it is, the more focusued the beams are. Previous run the lowest possible value was 80 cm, but si...
by jmc2000
Thu Apr 16, 2015 11:40 pm
Forum: The Accelerator
Topic: 2014 machine commissioning and 2015 start up
Replies: 59
Views: 158298

Re: 2014 machine commissioning and 2015 start up

Does anyone know what sort of intensity relative to 2012 50ns operation the LHC gurus are aiming for this year? I believe it might be a further x2 which would give a possible integrated 2fb/week if I'm not mistaken According to the previous link given by Tau, the schedule is to initially try 50ns a...
by jmc2000
Mon Apr 13, 2015 2:18 pm
Forum: The Accelerator
Topic: 2014 machine commissioning and 2015 start up
Replies: 59
Views: 158298

Re: 2014 machine commissioning and 2015 start up

Does anyone know what sort of intensity relative to 2012 50ns operation the LHC gurus are aiming for this year? I believe it might be a further x2 which would give a possible integrated 2fb/week if I'm not mistaken. Good luck to the guys involved with commissioning and operating the LHC! Cheers, Jmc
by jmc2000
Mon Mar 30, 2015 12:08 pm
Forum: The Accelerator
Topic: Where's the link to LHC morning meeting documentation?
Replies: 29
Views: 58710

Where's the link to LHC morning meeting documentation?

Does anyone know the link for the daily LHC morning meeting documentation?

Cheers,

Jmc
by jmc2000
Thu Sep 25, 2014 9:22 pm
Forum: The Accelerator
Topic: Getting closer to startup
Replies: 4
Views: 11630

Re: Getting closer to startup

Beam commissioning is delayed by a little over 2 months, starting in early March 2015:

https://indico.cern.ch/event/338501/ses ... ides/0.pdf
by jmc2000
Sat Sep 28, 2013 1:20 pm
Forum: The Accelerator
Topic: LS1 - First Long shutdown
Replies: 1
Views: 5977

LS1 - First Long shutdown

On schedule so far for injectors turned on in mid 2014, beams at 13Tev in Jan 2015:

http://indico.cern.ch/getFile.py/access ... fId=271224

http://indico.cern.ch/conferenceDisplay ... fId=271224
by jmc2000
Wed Dec 19, 2012 10:33 pm
Forum: The Accelerator
Topic: How successful were the 25ns studies?
Replies: 1
Views: 7154

How successful were the 25ns studies?

Does anyone know how successful the 25ns studies were and what was learned?

Thanks in advance,

JMc
by jmc2000
Fri Nov 30, 2012 2:27 am
Forum: The Accelerator
Topic: Any videos of accelerator collisions as they happen?
Replies: 3
Views: 7956

Re: Any videos of accelerator collisions as they happen?

There's something that resembles your description at about 1:10 of this video: http://www.youtube.com/watch?v=BGeW6Nc6IMQ and most likely the flashes in there are either real photographic flashes from taking snapshots of particle trails in bubble chamber, or cherenkov radiation which is just a bypr...
by jmc2000
Fri Nov 30, 2012 2:24 am
Forum: The Accelerator
Topic: Any videos of accelerator collisions as they happen?
Replies: 3
Views: 7956

Re: Any videos of accelerator collisions as they happen?

This clip is from the Equinox documentary Simply Complex aired in the UK in 2000.

http://www.youtube.com/watch?v=-lqdLHFN ... e=youtu.be
by jmc2000
Wed Nov 28, 2012 9:18 pm
Forum: The Accelerator
Topic: Pre-2008 predicted timeline of LHC performance?
Replies: 2
Views: 7305

Pre-2008 predicted timeline of LHC performance?

well, as the LHC comes to the end of its running for the long two year shut-down, I think we can all agree that it has been a huge success, right? 1. 125Gev Higgs discovered 2. Expected SUSY models ruled out. 3. Over 25/fb of data recorded for Atlas and CMS for theorists for the next two years. 4. E...
by jmc2000
Fri Nov 23, 2012 11:31 pm
Forum: The Accelerator
Topic: Any videos of accelerator collisions as they happen?
Replies: 3
Views: 7956

Any videos of accelerator collisions as they happen?

Does anyone know of any videos of accelerator collisions as they happen? I remember watching a video about Gell-Mann called Strange beauty, and there was a fragment which showed collisions taking place in an accelerator, giving rise to a localised bright spark, and accompanying loud noise. Regards, ...