Author/Authors :
Barnyakov، نويسنده , , A.Yu and Barnyakov، نويسنده , , M.Yu and Bobrovnikov، نويسنده , , V.S. and Buzykaev، نويسنده , , A.R. and Danilyuk، نويسنده , , A.F and Guber، نويسنده , , F.F and Kolachev، نويسنده , , G.M. and Kononov، نويسنده , , S.A and Krasnov، نويسنده , , V.A and Kravchenko، نويسنده , , E.A. and Kurepin، نويسنده , , A.B and Minakov، نويسنده , , G.D and Onuchin، نويسنده , , A.P and Savinov، نويسنده , , G.A and Tay، نويسنده ,
Abstract :
The status of the ASHIPH (Aerogel, wavelength SHIfter, and PHotomultipliers) system of the KEDR detector is described. The measurement of the quality of the particle identification with the ASHIPH counters was performed. The π/K separation is 4.5σ for the momentum 1.2 GeV/c and 4.7σ for the momentum 0.86 GeV/c. Timing properties of the ASHIPH counter are measured. The time resolution for pions is 2 ns, and the BBQ decay time is 15 ns. The advantages and disadvantages of Cherenkov counters filled with aerogel crumb are discussed. The process of the mass counter production for the KEDR detector is described.
