The NA62 experiment at CERN, aimed to measure K+ -> pi+ nu anti-nu branching fraction ( O(10^-10) ), relies on a Neon based RICH detector for pi/mu separation, time measurement and level 0 trigger. The experimental requirements for this detector are: a muon contamination in pion samples lower than 5 x 10^-3 in the momentum range 15–35 GeV/c and a time resolution on the charged track better than 100 ps.A prototype of such a detector was built and tested in 2009; it consists of a full length (18 m) Ne filled vessel equipped with a spherical mirror and 414 PMs on its focal plane, located about 17 m upstream of the mirror. This prototype was tested at CERN SPS on a positive hadron beam, in the required momentum range, to measure the pi/mu separation and to confirm the time resolution obtained with a previous prototype; the misidentification probability is about 0.7% and the time resolution is better than 100 ps in the whole momentum range.
Pion–Muon separation with a RICH prototype for the NA62 experiment / B., A., G., A., C., A., C., B., Bizzeti, A., F., B., A., C., P., C., R., C., G., C., V., F., S., G., S., G., E., I., G., L., M., L., G., M., E. M., M., M., P., R., P., et al.. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 621:1-3(2010), pp. 205-211. [10.1016/j.nima.2010.05.062]
Pion–Muon separation with a RICH prototype for the NA62 experiment
BIZZETI, Andrea;
2010
Abstract
The NA62 experiment at CERN, aimed to measure K+ -> pi+ nu anti-nu branching fraction ( O(10^-10) ), relies on a Neon based RICH detector for pi/mu separation, time measurement and level 0 trigger. The experimental requirements for this detector are: a muon contamination in pion samples lower than 5 x 10^-3 in the momentum range 15–35 GeV/c and a time resolution on the charged track better than 100 ps.A prototype of such a detector was built and tested in 2009; it consists of a full length (18 m) Ne filled vessel equipped with a spherical mirror and 414 PMs on its focal plane, located about 17 m upstream of the mirror. This prototype was tested at CERN SPS on a positive hadron beam, in the required momentum range, to measure the pi/mu separation and to confirm the time resolution obtained with a previous prototype; the misidentification probability is about 0.7% and the time resolution is better than 100 ps in the whole momentum range.
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