The NA62 experiment at CERN, aiming at a precision measurement of the ultra-rare decay K+ into pion neutrino anti-neutrino, relies on a gas based RICH detector for π/μ separation and level 0 trigger. The experimental requirements for this detector are a time resolution better than 100 ps and a muon rejection factor better than 5×10^−3 in the momentum range 15–35 GeV/c. A first prototype of such a detector has been built and tested in 2007, as a first check of its time resolution and of the light collection technique; it consists in a full length (18 m) Ne filled vessel equipped with a spherical mirror and 96 PMs on its focal plane, ~17m upstream of the mirror. The prototype has been tested at CERN SPS on a 200 GeV/c pion beam mainly; the time resolution has been found to be about 65 ps, and the light collection, i.e. the number of hit PMs per ring, fairly as expected.
The NA62 RICH Detector
COLLAZUOL, GIANMARIA;
2010
Abstract
The NA62 experiment at CERN, aiming at a precision measurement of the ultra-rare decay K+ into pion neutrino anti-neutrino, relies on a gas based RICH detector for π/μ separation and level 0 trigger. The experimental requirements for this detector are a time resolution better than 100 ps and a muon rejection factor better than 5×10^−3 in the momentum range 15–35 GeV/c. A first prototype of such a detector has been built and tested in 2007, as a first check of its time resolution and of the light collection technique; it consists in a full length (18 m) Ne filled vessel equipped with a spherical mirror and 96 PMs on its focal plane, ~17m upstream of the mirror. The prototype has been tested at CERN SPS on a 200 GeV/c pion beam mainly; the time resolution has been found to be about 65 ps, and the light collection, i.e. the number of hit PMs per ring, fairly as expected.
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