Electromagnetic calorimeter

The 7-ray detector is a cylindrical electromagnetic calorimeter 14 cm in length consisting of 16 rows of 12 crystals of pure Csl, each 17 x 17 x 13 mm3 in size, and individually wrapped in Teflon. 

Flight system (TOF), a Ring Imaging Cerenkov (RICH) and an Electromagnetic Calorimeter (ECAL) (Figure 1). 

The CMS experiment—one of the four large LHC experiments— is a general-purpose detector designed to optimally exploit the physics potential of the LHC. Located inside the superconducting solenoid, which provides a 3.8 Tesla held, are the hadronic and electromagnetic calorimeters as well as the tracking system. The latter is based on silicon pixels and silicon strip detectors, with a total sUicon area of 210 m. A multi-layer muon system embedded in the return yoke outside the solenoid completes the CMS detector. 

The CMS electromagnetic calorimeter (ECAL) is a hermetic and homogeneous detector with a large pseudorapidity coverage up to rj < 3. The ECAL is divided... 

The energy resolution of the electromagnetic calorimeter can be parametrized by the following expression ... 

Albrow, M. G., Apsimon, R., Aubert, B., Bacci, C., Bezaguet, A., Bonino, R., Cennini, R, and Centro, S., et al.. Performance of a uranium/tetramethylpentane electromagnetic calorimeter, Niich Instnim. Methods, A265, 303, 1988. 

Large detectors from the EHS now in use in NA36 include downstream tracking chambers, two electromagnetic calorimeters and two hadronic calorimeters which measure energy flow and rapidity distributions. Additionally, a large gas Cerenkov detector identifies fragments from the beam projectile. 

For 7r/e and 7r//z separation as well as K/p separation in the 1-1.4 GeV/c region and above 2.7 GeV/c, one needs additional information lower-momentum electrons are identified by dE/dx, while higher-momentum electrons can be identified by pattern recognition in the electromagnetic calorimeter the instrumented flux return is employed for muon identification antiprotons leave a clear signature in the electromagnetic calorimeter. 

---