Search

The large-scale coordinate-tracking detector TREK for registration of inclined EAS is being developed in MEPhI. The detector is based on multiwire drift chambers from the neutrino experiment at the IHEP U-70 accelerator. Their key advantages are a large effective area (1.85 m2), a good coordinate and angular resolution with a small number of measuring channels. The detector will be operated as part of the experimental complex NEVOD, in particular, jointly with a Cherenkov water detector (CWD) with a volume of 2000 cubic meters and the coordinate detector DECOR. The first part of the detector named Coordinate-Tracking Unit based on the Drift Chambers (CTUDC), representing two coordinate planes of 8 drift chambers in each, has been developed and mounted on opposite sides of the CWD. It has the same principle of joint operation with the NEVOD-DECOR triggering system and the same drift chambers alignment, so the main features of the TREK detector will be examined. Results of the CTUDC development and a joint operation with NEVOD-DECOR complex are presented.

A Cherenkov water detector with volume 9× 9 × 26 cubic meters is described.The spatial lattice of the detector is formed by quasispherical measuring modules which allow to detect Cherenkov light from any direction with practically equal efficiency. Each of the modules consists of six PMTs directed along rectangular coordinate axes. The possibility of neutrino-induced muon detection under conditions of high background on the Earth's surface is discussed. Experimental data obtained during Spring 1996 are analysed.