Watching collisions

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Xymox
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Watching collisions

Post by Xymox » Thu Apr 01, 2010 6:12 am

How to see what the LHC is doing..

First check Page 1 and see if the LHC has beams running in the machine..
Look for -ALL- green boxes in the lower right of the page 1 display.
http://op-webtools.web.cern.ch/op-webto ... p?usr=LHC1

A typical day squeezed down into a few minutes for a example of what happens.. Stable Beams is when collisions happen.
http://home.halifax.rwth-aachen.de/~mrongen/movie.html

Then if there are beams and they have been set to collide then you can watch the event displays show a live random snapshot of some of the events. There are WAY more then this display shows. They occur continuously for hours at rates as high as 100 per second of interesting events worth saving and looking at.

live collisions:

LHCb http://libris.nornagon.net/jca/lhc.htm

ATLAS http://atlantis.cern.ch/live/

ALICE http://alice-logbook.cern.ch/aliceOnlin ... nline.html

We dont yet know if CMS will have a live events page

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CharmQuark
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Re: Watching collisions

Post by CharmQuark » Thu Apr 01, 2010 7:34 am

It pleases me that we have ATLAS :dance:
Anyone who doesn't take truth seriously in small matters cannot be trusted with large ones either by Albert Einstein.

Disco Legend Zeke
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Re: Watching collisions

Post by Disco Legend Zeke » Thu Apr 01, 2010 1:52 pm

Can someone please post a page with an explanation of the color codes used in the ATLAS collision images?

I am sure it's somewhare, but i haven't found it.

THANKS!

Harbles
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Re: Watching collisions

Post by Harbles » Fri Apr 02, 2010 10:50 pm

Disco Legend Zeke wrote:Can someone please post a page with an explanation of the color codes used in the ATLAS collision images?

I am sure it's somewhare, but i haven't found it.

THANKS!
Yo Zeke! Knock yourself out. http://www.symmetrymagazine.org/breakin ... y-decoded/
And http://www.symmetrymagazine.org/breakin ... y-decoded/
Also http://www.symmetrymagazine.org/breakin ... 94decoded/

Ur Welcome lol :geek:

stevegray
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Re: Watching collisions

Post by stevegray » Sun Apr 04, 2010 8:40 pm

http://cmsdoc.cern.ch/cmscc/cmstv/cmstv.jsp?channel=4
There is more stuff on higher channel numbers.
...Well I liked it.

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Xymox
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Re: Watching collisions

Post by Xymox » Mon Apr 05, 2010 10:48 am

They have added channel 12 and 13 now too..

http://cmsdoc.cern.ch/cmscc/cmstv/cmstv.jsp?channel=12
http://cmsdoc.cern.ch/cmscc/cmstv/cmstv.jsp?channel=13

the ones above that seem blank tho like 14

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CharmQuark
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Re: Watching collisions

Post by CharmQuark » Sat May 01, 2010 12:46 am

anna_lyn00 welcome to the happy place :thumbup:

Hope you enjoy ya stay with us :D
Anyone who doesn't take truth seriously in small matters cannot be trusted with large ones either by Albert Einstein.

Harbles
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Re: Watching collisions

Post by Harbles » Wed Jul 14, 2010 7:30 pm

Another article from Symmetry Magazine on decoding event displays. May be a repeat but has a lot of info grouped together in one post.
LHC Decoded.
http://www.symmetrymagazine.org/cms/?pid=1000816

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7holography
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Re: Watching collisions (colored jets coding ?)

Post by 7holography » Sun Aug 08, 2010 9:42 am

Thanks for these useful links and explanation

but still no information about the color code used
in the Atlas live event display page
(except for dimuons red lines
and gray lines they say not useful for research)

what about the yellow ,orange, indigo,blue, green and so curved lines ?

thanks in advance if anyone know

Pierre

:happy-bouncymulticolor: :happy-bouncymagenta: :happy-bouncygreen: :happy-bouncycyan: :happy-bouncyblue: :happy-bouncyred:

NThorpe
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Re: Watching collisions

Post by NThorpe » Sat Aug 14, 2010 4:35 pm

Hi Pierre,

I'm almost sorry to tell you this, but the colours of the tracks used in the Atlantis event displays don't mean anything. Colours don't correspond to different types of particles. Track 1 gets the first colour in the palette, track 2 gets the next one, and so on. They're only coloured so that you can distinguish tracks.

-Nigel

Eric
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Re: Watching collisions

Post by Eric » Sat Aug 14, 2010 8:11 pm

In the automatically generated displays the color of the tracks has no meaning indeed. This type of coloring is usually used to show the relation between hits and tracks in the detector. The tracks are colored randomly and the hits are shown in the color of the corresponding track.

The hand-picked events often use different colors to emphasize certain features of the event. For example the two muon tracks that were drawn in red. For these events there is no standard color scheme. It is usually just the preference of the person making the picture.

Gray tracks are a different story. Just as a group of hits in the detector can form a track, a group of tracks can form a jet. To show the relation between jets and tracks, you can do the same thing as before: you color the jets randomly and assign tracks the same color as the corresponding jet. If in this situation a track does not have corresponding jet, it will turn gray.

fwyzard
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Re: Watching collisions

Post by fwyzard » Fri Oct 08, 2010 9:52 pm

Hi,
I don't know if these are "officially" public, but you can access the CMS event display in ~ realtime at these links:

3D view: http://cmsonline.cern.ch/iSpy/iSpy.png
other views: http://cmsonline.cern.ch/evtdisp/fireworks_hlt_p5.png

.A

OrangeAndBlue
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Re: Watching collisions

Post by OrangeAndBlue » Tue Feb 15, 2011 10:16 pm

Harbles wrote:Another article from Symmetry Magazine on decoding event displays. May be a repeat but has a lot of info grouped together in one post.
LHC Decoded.
http://www.symmetrymagazine.org/cms/?pid=4396508
Symmetry Mag is a perfect place for a beginner like me to start in trying to decipher some of the ways people are coding the events of the LHC. I do not have a total grasp on the codes at hand, but I feel like I am making progress which is a good thing :D
Step, Step I Discern with Each Breath, not Concerned with the Rest 'Cause in Turn I will Rest, so I Press With my Best Foot Forward as I Earn my Respect, take my Time to Reflect and Connect Thoughts.

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CharmQuark
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Re: Watching collisions

Post by CharmQuark » Fri Feb 18, 2011 10:06 pm

Stop spamming OrangeAndBlue :thumbup:
Anyone who doesn't take truth seriously in small matters cannot be trusted with large ones either by Albert Einstein.

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7holography
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Atlas Live Event display

Post by 7holography » Wed Mar 23, 2011 9:02 am

Hye,

Any chance to see the Atlas Live Event display turned on ?

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