In the past few hours CMS has experienced "beam-gas" collisions - interactions of the 3.5 TeV beams with residual gas particles in the beam pipe in
the centre of CMS. These interactions have allowed measurements to be made of the expected horizontal and vertical positions of the 7 TeV collisions
in CMS - see below. It seems there is a very small offset (about 100 microns) in the vertical (Y) position but the horizontal (X) is perfect..
Thanks for the web cam link prof-rabbit
History in the making live on the net , now we just have to wait till they sort out the data ,and then see what happens when they run the machine at
full power .
Bring on the Multiverse
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