Watching collisions
Watching collisions
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
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
- CharmQuark
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Re: Watching collisions
It pleases me that we have ATLAS
Anyone who doesn't take truth seriously in small matters cannot be trusted with large ones either by Albert Einstein.
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Re: Watching collisions
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!
I am sure it's somewhare, but i haven't found it.
THANKS!
-
- LHCPortal Guru
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Re: Watching collisions
Yo Zeke! Knock yourself out. http://www.symmetrymagazine.org/breakin ... y-decoded/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!
And http://www.symmetrymagazine.org/breakin ... y-decoded/
Also http://www.symmetrymagazine.org/breakin ... 94decoded/
Ur Welcome lol
Re: Watching collisions
http://cmsdoc.cern.ch/cmscc/cmstv/cmstv.jsp?channel=4
There is more stuff on higher channel numbers.
...Well I liked it.
There is more stuff on higher channel numbers.
...Well I liked it.
Re: Watching collisions
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
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
- CharmQuark
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Re: Watching collisions
anna_lyn00 welcome to the happy place
Hope you enjoy ya stay with us
Hope you enjoy ya stay with us
Anyone who doesn't take truth seriously in small matters cannot be trusted with large ones either by Albert Einstein.
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- LHCPortal Guru
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Re: Watching collisions
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
LHC Decoded.
http://www.symmetrymagazine.org/cms/?pid=1000816
- 7holography
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Re: Watching collisions (colored jets coding ?)
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
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
Re: Watching collisions
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
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
Re: Watching collisions
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.
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.
Re: Watching collisions
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
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
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Re: Watching collisions
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 thingHarbles 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
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.
- CharmQuark
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Re: Watching collisions
Stop spamming OrangeAndBlue
Anyone who doesn't take truth seriously in small matters cannot be trusted with large ones either by Albert Einstein.
- 7holography
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Atlas Live Event display
Hye,
Any chance to see the Atlas Live Event display turned on ?
Any chance to see the Atlas Live Event display turned on ?