Speaker
Description
In 1992, a new detection technique was proposed for threshold aerogel counters with light collection using re-emitting light guides in the G.I. Budker Institute of Nuclear Physics, Novosibirsk. Based on this technique, an identification system was developed and build for the KEDR detector conducting experiments at the VEPP-4M e+e- collider. The system includes 160 counters, total volume of aerogel is 1000 l. MCP PMTs are used as photon detectors. The re-emitting light guides have a characteristic cross-section of 3x17 mm and a length of up to 600 mm. The production technology of special acrylic glass for these re-emitters was developed jointly with the Kargin Polymer Institute, Dzerzhinsk. Later, this technique found application in threshold aerogel counters of the SND detector (VEPP-2000, Novosibirsk). This detector uses 2 sets of counters with refractive indices of 1.05 and 1.13.
The experience gained in developing these detectors was successfully used to create large-area scintillation detectors for the TAIGA experiment. These detectors have an area of 1 m^2, a scintillator thickness of 10-20 mm and are read using the FEU-85 with a photocathode diameter of 25 mm. Currently, developments are underway to modernize this technology in order to replace traditional PMTs with silicon PMTs. This will significantly increase the signal amplitude. Accordingly, this gives new opportunities for identifying particles in the momentum region close to the threshold of Cherenkov radiation, as well as in the region slightly above the threshold of Cherenkov radiation, which was previously impossible. Currently, a prototype for the identification system for the future VEPP-6 project at BINP is being tested, as well as for the Super Tau Charm factory in China.
| Position | senior researcher |
|---|---|
| Affiliation | Budker INP SB RAS/ Novosibirsk State University |
| Country | Russia |