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Re: What do the displays mean ?2

Posted: Mon Mar 22, 2010 12:41 pm
by Danny252
amiso wrote:Today is March 31th.
You sure about that? ;)

Re: What do the displays mean ?2

Posted: Mon Mar 22, 2010 1:32 pm
by CharmQuark
Danny252 wrote:
amiso wrote:Today is March 31th.
You sure about that? ;)
My God i must have slept through my Birthday :shock: wonkie :lol:

Re: ** Current Events and discussion **

Posted: Tue Mar 23, 2010 4:11 pm
by jmayes
Just checked in, looks like 3+ hours of both beams at 3.5TeV and holding! Looking good for a big event! (but no detectors are switched on yet)

Re: ** Current Events and discussion **

Posted: Tue Mar 23, 2010 4:32 pm
by CharmQuark
everybody wait for the 30th :thumbup: gonna be one hell of a birthday present for me :happy-jumpyellow: can't wait :dance:

Re: ** Current Events and discussion **

Posted: Tue Mar 23, 2010 6:28 pm
by Wallmott
jmayes wrote:Just checked in, looks like 3+ hours of both beams at 3.5TeV and holding! Looking good for a big event! (but no detectors are switched on yet)
Have the beams crossed path yet? but without the detectors on?

Re: ** Current Events and discussion **

Posted: Tue Mar 23, 2010 8:04 pm
by jmayes
Wallmott wrote:Have the beams crossed path yet? but without the detectors on?
There are magnets to keep the beams apart in the experiments but so far they have not been used so there could have been collisions but since they have only 1 bunch in each beam and are keeping them out of sync with each other it was unlikely.

Re: ** Current Events and discussion **

Posted: Tue Mar 23, 2010 11:27 pm
by Harbles
Wallmott wrote:
jmayes wrote:Just checked in, looks like 3+ hours of both beams at 3.5TeV and holding! Looking good for a big event! (but no detectors are switched on yet)
Have the beams crossed path yet? but without the detectors on?
Beams have not been made to collide at 7 TeV but expected collisions was announced officially today http://press.web.cern.ch/press/PressRel ... 6.10E.html (Champagne!)
It better work at 9:00 AM CERN time as they have live satellite feed booked http://press.web.cern.ch/press/lhc-firs ... /schedule/ lol

I think the detectors are on to collect whatever events occur (cosmics, Beam on particles in the vacuum, collimator and beam scraping) just to try and analyse as many events as possible to do calibration on the detectors before the fire hose of events actual collisions at high energy and luminosity produce. For example this CMS DAQ display http://cmsdoc.cern.ch/cmscc/cmstv/cmstv ... frames=yes has the instrument set to Physics on Random on and Calibcyc on. which I believe means they are trying to capture what ever event may occur for whatever reason. I would think the other experiments are doing this too.