Speaker
Patrizia Cenci
(INFN Perugia (IT))
Description
NA62 is the last generation kaon experiment at CERN. Its main goal is to collect about 100 K+→π+νν events with 10% background. This implies to collect 10^13 K+ decays with a backgound rejection factor of at least 10^12. The challenging aspect of the experiment is the suppression of K decays with branching ratio up to 10 orders of magnitude higher than the signal and similar experimental signature, such as K+→μ+ν. To this purpose good PID (Particle IDentification) and kinematic rejection are required. Precise timing is needed to correctly associate the π+ with the parent K+ in an high rate environment.
A RICH detector is proposed as PID element, to identify μ contaminating the π sample in the 15-35 GeV/c momentum range with inefficieny lower than 1% and to measure the π arrival time with precision better than 100 ps. It will also be a key element for the 1-track trigger.
A vacuum-proof cylindrical vessel with 4 m diameter, about 17.5 m long, will be filled with Ne gas at atmospheric pressure. The Cherenkov light will be reflected by a mosaic of 20 hexagonal mirrors with 17 m focal length and collected by about 2000 PMT.
The construction of the detector is almost completed and the installation will start in 2013.
New and final results of the last prototype test at CERN, the updated description of the detector and the current status of the construction, the readout electronics and the trigger system based on the RICH will be presented.
| quote your primary experiment | NA62 |
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Primary author
Patrizia Cenci
(INFN Perugia (IT))
