Search found 29 matches

by Tim Bergel
Mon Jul 05, 2010 10:33 am
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 86188

Re: Current Events Discussion

Still looking for a sustained run with stable beams though
Sure looks like they did it - 10 hours and counting
by Tim Bergel
Fri Jul 02, 2010 9:24 am
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 86188

Re: Current Events Discussion

From the live schedule:

Fri 08:00 Prepare for 7 on 7 physics
Fri 16:00 Holland v Brazil

:lol:

looks like they had a good few hours at 7 on 7 last night.
by Tim Bergel
Tue Jun 29, 2010 3:18 pm
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 86188

Re: Current Events Discussion

But this time they lost the beams due to a dump caused by a lightening strike :o

Got to be a good test of the machine protection system, at least :)
by Tim Bergel
Tue May 25, 2010 11:27 am
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 86188

Re: Current Events Discussion

pcatom wrote: The collision point for LHCb is displaced with respect to the other experiments. Providing collisions in LHCb therefore means displaced collisions in the other experiments. Can any guru out there explain why that is? Surely it would be much easier if LHCb was not so displaced and a set...
by Tim Bergel
Wed Dec 16, 2009 5:55 pm
Forum: The Accelerator
Topic: LHC Shutdown schedule
Replies: 30
Views: 6265

Re: LHC Shutdown schedule

Bye guys - see you in February. Have a good Christmas.
by Tim Bergel
Tue Dec 15, 2009 1:39 pm
Forum: The Accelerator
Topic: basic accelerator theory from a great discussion in chat
Replies: 7
Views: 8608

Re: basic accelerator theory from a great discussion in chat

Thanks for the great information - really makes it easier to understand what is going on! Going to the "Introduction to accelerator physics" link given above I stumbled upon "Accelerators for pedestrians" (http://cdsweb.cern.ch/record/1017689/files/ab-note-2007-014.pdf) which seems to be an amalgama...
by Tim Bergel
Fri Dec 04, 2009 5:30 pm
Forum: The Accelerator
Topic: What to ask the LHC team about its operations or displays
Replies: 25
Views: 5253

Re: What to ask the LHC team about its operations or displays

Try: viewtopic.php?f=3&t=84
That's great for the status of the machine but won't show any collision info, I think. What I was hoping for was an overview showing how the various detectors were doing at logging collisions.

Obviously only the barest overview is possible ...
by Tim Bergel
Fri Dec 04, 2009 10:23 am
Forum: The Accelerator
Topic: What does ... mean?
Replies: 28
Views: 14957

Re: What does ... mean?

beam cleaning basically scrapes the particles of the beam that are spread outside of the core beam away, so that the beam cross-section stays constant Well, I guessed it was something along those lines - though thanks for the precise description - but what I was really trying to find out was the me...
by Tim Bergel
Wed Dec 02, 2009 11:43 am
Forum: The Accelerator
Topic: What does ... mean?
Replies: 28
Views: 14957

Re: What does ... mean?

taking some of the information Danny posted: Point 1: ATLAS Point 2: ALICE, Beam 1 Entry Point 3: Beam Cleaning (Momentum) Point 4: RF (Radio Frequency, meaning..?) Point 5: CMS Point 6: Dump Point 7: Beam Cleaning (Betatron) Point 8: LHCb, Beam 2 Entry I would like to know what the two beam cleanin...
by Tim Bergel
Wed Dec 02, 2009 11:29 am
Forum: The Accelerator
Topic: What to ask the LHC team about its operations or displays
Replies: 25
Views: 5253

Re: What to ask the LHC team about its operations or displays

Hi Xymox, Can I start with a big "Thanks" to you personally, its a great job you are doing & much appreciated. I can think of a number of bits of information that we could use: 1. A run down on the different page 1 displays as the LHC shifts from mode to mode and what information is contained therei...
by Tim Bergel
Tue Dec 01, 2009 5:39 pm
Forum: New Users Start Here
Topic: What do the displays mean ?
Replies: 85
Views: 57788

Re: What do the displays mean ?

I found BRAN in the acronyms list:

Beam RAte Neutrals (TAN type luminosity monitor) and TAN means Target Absorber Neutral

so yes, a type of luminosity monitor ...
by Tim Bergel
Tue Dec 01, 2009 3:23 pm
Forum: Portal link and forum suggestions
Topic: Portal links changes 11/25/09
Replies: 13
Views: 2825

Re: Portal links changes 11/25/09

Well it looks as if a few members of CERN (LHC_Insider?) have been able to give us a guide to Page 1 and LHC ops...

Thank you so much :D

I do hope CERN sees this as a positive thing, I would have thought it's great publicity.
by Tim Bergel
Tue Dec 01, 2009 3:16 pm
Forum: The Accelerator
Topic: Old Breaking news 11/30-12/2/09
Replies: 20
Views: 8331

Re: *** Breaking news ***

Thanks also from me for the info, LHC_Insider - its really useful & interesting to hear from someone who understands such a complex system. It sounds like you are all having a great time getting the machine up to speed!
by Tim Bergel
Thu Nov 26, 2009 1:21 pm
Forum: Portal link and forum suggestions
Topic: Portal links changes 11/25/09
Replies: 13
Views: 2825

Re: Portal links changes

Definitely not more blinking lights ... Your comment about lots of users from CERN made me think - is there any chance that someone from CERN could post a short guide to the "page 1" and "Status op" displays? Some of the items are fairly obvious but others are completely opaque - it would really be ...