Author/Authors :
Blick، نويسنده , , A.M. and Kachanov، نويسنده , , V.A. and Khaustov، نويسنده , , G.V. and Kolosov، نويسنده , , V.N. and Korzhik، نويسنده , , M.V. and Lednev، نويسنده , , A.A. and Peigneux، نويسنده , , J.-P. and Polovnikov، نويسنده , , S.A. and Prokoshkin، نويسنده , , Yu.D. and Samoylenko، نويسنده , , V.D. and Shagin، نويسنده , , P.M. and Singovsky، نويسنده , , A.V. and Sugonyaev، نويسنده , , V.P.، نويسنده ,
Abstract :
The lead tungstate (PWO) heavy crystal calorimeter is tested in a GAMS-type experiment detecting 50 000 π0-mesons produced in a 32.5 GeV/c intensive π− beam of the 70 GeV IHEP accelerator. In spite of a huge beam load of the calorimeter cells (up to 106 π−/s), a clean π0 → 2γ signal is observed. The measured PWO spectrometer mass resolution is in good accordance with previous electron beam tests and GEANT calculations. A high precision of the real-time PWO spectrometer calibration, using the π0 signal during the physics run, is achieved. The results of these very first spectrometric beam tests demonstrate a high performance of multicell PWO spectrometers in heavy-load high energy physics experiments of both fixed target and collider types.
