Tag: luminosity
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Illuminating! Counting LHC collisions with CMS
In the LHC, groups of 100 billion protons collide 25 million times every second.
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Reconstructing a multitude of particle tracks within CMS
The LHC circulates protons inside its beam-pipes not in a continuous stream but in several very closely packed bunches.
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New milestone – 10/fb recorded by CMS in 2012
CMS has just passed another major milestone, recording more than 10 inverse femtobarns of data at 8 TeV.
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CMS 2012 data already exceed 2011 sample
LHC has delivered 6.65 fb−1 of collisions to CMS in 2012 so far
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2011 proton collisions come to an end
At about half-past five in the evening on Sunday, 30th October, an e-mail from Run Coordination to the CMS collaboration said: At 17:00 today the LHC dumped the last proton beams for the year to start the machine development period and to prepare for the ion running.
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Summary of 2011 p-p running
At 17:00 on Sunday 30th October the LHC dumped the last proton beams for the year to start the machine development period and to prepare for heavy ion running.
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LHC delivers 5 inverse femtobarns
The LHC has now delivered 5 inverse femtobarns (fb−1) of data in 2011, of which CMS has collected 4.53 fb−1.
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LHC delivers over 4 inverse femtobarns
The LHC has now delivered over 4 inverse femtobarns (fb−1) of data in 2011, of which CMS has collected 3.7 fb−1.
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LHC fill sets new luminosity record
Over the course of 16.5 hours ending Wednesday, Sept.
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How does CMS measure Luminosity?
The number of events that an experiment observes is proportional to a quantity called the luminosity — a measure of how many collisions are occurring in the detector.









