Operation and performance of the ASHIPH counters at the KEDR detector
Frontier detectors for frontier physics : 13th Pisa Meeting on Advanced Detectors
24-30 May 2015
ConferenceType.INTERNATIONAL_CONFERENCE, La Biodola, Isola d'Elba
|| Barnyakov Aleksandr Yurʹevich
, Barnyakov Mikhail Yurievich
, Bobrovnikov Viktor Sergeevich
, Buzykaev Alexey
, Danilyuk Alexandr Fedorovich
, Katcin Aleksandr A.
, Kononov Sergey Anatolʹevich
, Kravchenko E. A.
, Kuyanov I. A.
, Onuchin Aleksei Pavlovich
, Ovtin I. V.
, Rodyakin V. A.
Boreskov Institute of Catalysis SB RAS
Budker Institute of Nuclear Physics SB RAS
In 2014 the fully installed ASHIPH (Aerogel, SHifter, PHotomultiplier) system began its operation in the KEDR experiment at the VEPP-4M e+e- collider. The system contains 1000 liters of aerogel with refractive index 1.05 in160 counters that are arranged in two layers. Light collection is preformed by means of wavelength shifters. 160 Micro-Channel Plate PMTs with multialkali photocathode are used as photodetectors. Detection efficiency for relativistic particles was measured with е+е- -> e+e- events and cosmic muons. Detection efficiency for under-threshold particles was measured with cosmic muons. From these data pi/K-separation of 4 sigma at the momentum 1.2 GeV/c was obtained.