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., Angelucci; G., Anzivino; C., Avanzini; C., Biino; Bizzeti, Andrea; F., Bucci; A., Cassese; P., Cenci; R., Ciaranfi; G., Collazuol; V., Falaleev; S., Galeotti; S., Giudici; E., Iacopini; G., Lamanna; M., Lenti; G., Magazzù; E. M., Marinova; M., Pepe; R., Piandani; M., Piccini; G., Ruggiero; A., Sergi; M., Sozzi; M., Veltri. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 621:(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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