Search found 30 matches

by Lexa
Tue Dec 08, 2009 12:52 pm
Forum: The Accelerator
Topic: Underground webcams
Replies: 40
Views: 8404

Re: Underground webcams

LHC should restart beams around beginning of next february after the xmas break.

This is a very recent schedule change. There is to much things to do during this small shutdown that it has been extended.

So maybe there is an opportunity to go down, but I guess under very specific reasons.
by Lexa
Mon Dec 07, 2009 5:01 pm
Forum: The Accelerator
Topic: Underground webcams
Replies: 40
Views: 8404

Re: Underground webcams

Catching a beam at full energy is like taking ~80 kilos of TNT (exploding, of course).

No, you don't want to be in the way :D.
by Lexa
Mon Dec 07, 2009 12:45 am
Forum: The Accelerator
Topic: Underground webcams
Replies: 40
Views: 8404

Re: Underground webcams

We had some fun moment about imagining what it could be, and even more, how to modulate the sound by shapping the dump material to produce some kind of funny noise when a beam is dumped :D .
by Lexa
Mon Dec 07, 2009 12:31 am
Forum: The Accelerator
Topic: Underground webcams
Replies: 40
Views: 8404

Re: Underground webcams

I got more news about that. I asked a friend working on beam dumps and collimator. About beam dump, as it makes the material going from a low temparature to a high one, it deforms the metal. The chock wave can bounce back several times. Thus, when it meet air it produces sound. He has to check for t...
by Lexa
Sun Dec 06, 2009 3:49 pm
Forum: The Accelerator
Topic: Weekend of 12-3-09 collision events !
Replies: 188
Views: 26672

Re: *** COLLISION ALERT ***

I have just seen that sometime lhcb logbook can include picture!
http://lblogbook.cern.ch/Shift/
Look in the right column
by Lexa
Sun Dec 06, 2009 1:54 am
Forum: The Accelerator
Topic: Weekend of 12-3-09 collision events !
Replies: 188
Views: 26672

Re: *** COLLISION ALERT ***

I am on it, but with another client than their java tool (gaim).

I am using irc.efnet.ch server, which is a server in geneva.
by Lexa
Sun Dec 06, 2009 1:24 am
Forum: The Accelerator
Topic: Weekend of 12-3-09 collision events !
Replies: 188
Views: 26672

Re: *** COLLISION ALERT ***

The most popular IRC server are here:
http://irc.netsplit.de/networks/top100.php

Still need to find a good web client.
by Lexa
Sun Dec 06, 2009 1:14 am
Forum: The Accelerator
Topic: Weekend of 12-3-09 collision events !
Replies: 188
Views: 26672

Re: *** COLLISION ALERT ***

For IRC, some java applet/webstart exist, but you still need to open, and most likely register, a chat room on a irc server.


Also, today IRC clients are integrated in a lot of IM softwares.
by Lexa
Sun Dec 06, 2009 1:04 am
Forum: The Accelerator
Topic: Weekend of 12-3-09 collision events !
Replies: 188
Views: 26672

Re: *** COLLISION ALERT ***

I think we need an IRC chat room for moment like this one :)
by Lexa
Sun Dec 06, 2009 12:35 am
Forum: The Accelerator
Topic: Weekend of 12-3-09 collision events !
Replies: 188
Views: 26672

Re: *** COLLISION ALERT ***

This machine is awesome! :shock:
by Lexa
Sun Dec 06, 2009 12:26 am
Forum: The Accelerator
Topic: Weekend of 12-3-09 collision events !
Replies: 188
Views: 26672

Re: *** COLLISION ALERT ***

It might has been a try of both beam having more than one bunch at the same time.
by Lexa
Sun Dec 06, 2009 12:04 am
Forum: The Accelerator
Topic: Weekend of 12-3-09 collision events !
Replies: 188
Views: 26672

Re: *** COLLISION ALERT ***

From LHCb log book :
Beam 1 with 4 bunches was kept for 45 minutes and then dumped. LHC page 1 is stuck again (LHC is working on
fixing it).
This makes it clear now.
by Lexa
Sun Dec 06, 2009 12:00 am
Forum: The Accelerator
Topic: Weekend of 12-3-09 collision events !
Replies: 188
Views: 26672

Re: *** COLLISION ALERT ***

http://lhc-commissioning.web.cern.ch/lh ... C-news.htm

don't you think this "Ramp" in the schedule is quite interesting? :)

Ramp until now was used to reach higher energy (1.18 TeV for instance ^^).
by Lexa
Sat Dec 05, 2009 10:17 pm
Forum: Science
Topic: *** First science results ***
Replies: 9
Views: 3580

Re: *** First science results ***

Yes, you need a statistical proof, even if later we could show picture of "the first whatever-particle detected". You still need to be sure that it is not a coincidencce.

It would be actually better if two experimental setup could prove a new particle. Hence ATLAS and CMS for instance ^^.
by Lexa
Sat Dec 05, 2009 6:00 pm
Forum: New Users Start Here
Topic: WELCOME to my brand new LHC forum
Replies: 18
Views: 5187

Re: WELCOME to my brand new LHC forum

You can't become part of the grid because the unit of data needed for one analysis is way to big too send it to individual computers.

From what I understand from their webpage, it's rather used for other analysis/simulation that need smaller data source.