HCAL Completes Phase 1 Upgrades on the CMS Detector
With the connection of the final cable on October 4, CMS completed the installation of new on-detector electronics for the Hadron Calorimeter (HCAL) barrel detector. Following a series of upgrades to the electronics of  various HCAL…
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Luminosity for 2011, showing delivered [red] and recorded [blue] values.
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. An accelerator operating at high luminosity stands the best chance of producing…
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Overhead view of ECAL+HCAL test beam area. UMD crew can be seen on the left balc
HCAL Summer Test Beam Run
This year's HCAL test beam run in July was completely devoted to studies of hardware that will be used in the upcoming upgrades. During the course of the two weeks the detector was moved in two independent setups – HF and the combined EB+HB+HO –…
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