The place to discuss the LHC. Commissioning, operation, issues, events ....
-
Xymox
- Site Admin
- Posts: 1022
- Joined: Wed Nov 11, 2009 12:55 pm
- Location: Phoenix, Az USA
-
Contact:
Post
by Xymox » Fri Mar 19, 2010 4:45 am
Records were smashed tonight when the LHC reached 3500GeV per beam.
Congratulations

to all of the LHC team and CERN...
Now on to collisions at 7TeV...
Exciting times...
http://cdsweb.cern.ch/journal/CERNBulle ... 9542?ln=en
-
CharmQuark
- Site Admin
- Posts: 1486
- Joined: Fri Dec 04, 2009 2:22 am
- Location: Berwick-Upon-Tweed (UK)
Post
by CharmQuark » Fri Mar 19, 2010 4:58 am
Congrats

CERN and LHC guys,girls
Can't wait for the collisions

Anyone who doesn't take truth seriously in small matters cannot be trusted with large ones either by Albert Einstein.
-
Wallmott
- Posts: 24
- Joined: Fri Mar 12, 2010 7:51 am
Post
by Wallmott » Fri Mar 19, 2010 5:30 am
Haven´t they already collided the beams? Since both beams were running a 3,5 TeV at the same time?
-
Tau
- LHCPortal Guru
- Posts: 168
- Joined: Tue Jan 05, 2010 10:16 pm
- Location: Heemskerk, Netherlands
Post
by Tau » Fri Mar 19, 2010 7:27 am
Yeah!
We can now hope for a few "accidental" collisions, but maybe they will delay the news for a good publicity moment.
- Tau
-
serych
- Posts: 21
- Joined: Tue Mar 02, 2010 2:35 pm
- Location: Prague, Czech Republic
-
Contact:
Post
by serych » Fri Mar 19, 2010 7:44 am
Kudos to all the people from CERN!!!!
Jakub
-
Wallmott
- Posts: 24
- Joined: Fri Mar 12, 2010 7:51 am
Post
by Wallmott » Fri Mar 19, 2010 9:08 am
Tau wrote:Yeah!
We can now hope for a few "accidental" collisions, but maybe they will delay the news for a good publicity moment.
So since both beams were ramped up to 3,5 TeV at the same time, have the beams technically collided?
-
chriwi
- LHCPortal Guru
- Posts: 403
- Joined: Fri Nov 20, 2009 1:19 pm
- Location: Stuttgart Germany
-
Contact:
Post
by chriwi » Fri Mar 19, 2010 9:13 am
I don't expect accidental collissions as long as they run both baem with only a few bunches.
The more they fill the ring with more bunches of protons accidental collissions will be more likely and I really don't belive they try to avoid them.
Nevertheless its interesting that the LHCb-detector appears in off-mode for a long time now since this one was the first one to show early collissions to the public in december.
bye
chriwi
-
pcatom
- LHCPortal Guru
- Posts: 68
- Joined: Fri Nov 27, 2009 8:33 pm
- Location: Geneva
Post
by pcatom » Fri Mar 19, 2010 10:27 am
Hi
At present the bunches are placed in the machine in such a way that they do not collide in the experiments. Imagine 2 cars driving in opposite directions around a racetrack. They will cross in 2 diametrically opposed locations. The LHC can arrange it so that these crossing points occur outside the experiments. This way they check out the settings of the machine for both beams together without the added complication of them colliding - that comes later.
-
chriwi
- LHCPortal Guru
- Posts: 403
- Joined: Fri Nov 20, 2009 1:19 pm
- Location: Stuttgart Germany
-
Contact:
Post
by chriwi » Fri Mar 19, 2010 10:54 am
Correct so far, only that htere are no crossing points outside the experiments onlypassages of bunches wich never meet.
bye
chriwi
-
Stephen
- Posts: 496
- Joined: Sun Nov 22, 2009 11:09 pm
Post
by Stephen » Fri Mar 19, 2010 10:57 am
It won't be too long before we see actual collisions.
-
Kasuha
- Posts: 570
- Joined: Tue Dec 15, 2009 1:22 pm
Post
by Kasuha » Fri Mar 19, 2010 12:04 pm
They plan first collisions for 30th press conference or whatever are they planning to hold that day.
Technically speaking, half-energy (1.75 TeV) collisions are already happening (with residual particles in beam pipe, with beam pipe itself and in dump), yet another world record. It just doesn't happen in experiments.
-
Wallmott
- Posts: 24
- Joined: Fri Mar 12, 2010 7:51 am
Post
by Wallmott » Fri Mar 19, 2010 12:14 pm
Kasuha wrote:They plan first collisions for 30th press conference or whatever are they planning to hold that day.
Technically speaking, half-energy (1.75 TeV) collisions are already happening (with residual particles in beam pipe, with beam pipe itself and in dump), yet another world record. It just doesn't happen in experiments.
Dont you think they will do some before? It would be embaresing if it did not work.
"Uhh, sorry guys we will just have to fix some problems and we will be back in a few hours!"
-
Stephen
- Posts: 496
- Joined: Sun Nov 22, 2009 11:09 pm
Post
by Stephen » Fri Mar 19, 2010 12:23 pm
I don't think they can top the embarrassment they had in 2008 or when that bird dropped bread on the machine.
-
spencer
- Posts: 71
- Joined: Tue Dec 15, 2009 1:11 am
- Location: Rockville, MD
-
Contact:
Post
by spencer » Fri Mar 19, 2010 1:28 pm
-
Danny252
- LHCPortal Guru
- Posts: 169
- Joined: Mon Nov 23, 2009 4:45 pm
Post
by Danny252 » Fri Mar 19, 2010 3:43 pm
Kasuha wrote:They plan first collisions for 30th press conference or whatever are they planning to hold that day.
Technically speaking, half-energy (1.75 TeV) collisions are already happening (with residual particles in beam pipe, with beam pipe itself and in dump), yet another world record. It just doesn't happen in experiments.
Each beam is 3.5 TeV, so total collision would be 7 TeV (with half being 3.5, not 1.75) - full power is 7 TeV and 14 TeV respectively.