Author/Authors :
Kessler، نويسنده , , R.S and Roodman، نويسنده , , A and Shawhan، نويسنده , , P and Solomey، نويسنده , , N and Winstein، نويسنده , , B and Hansen، نويسنده , , S and Nguyen، نويسنده , , H and Ray، نويسنده , , R and Tschirhart، نويسنده , , R and Whitmore، نويسنده , , J and Nakaya، نويسنده , , T and Lindgren، نويسنده , , M، نويسنده ,
Abstract :
A prototype electromagnetic calorimeter for the KTeV experiment at Fermilab was tested at the CERN X1 beam-line. The calorimeter consisted of undoped cesium iodide crystals which were exposed to electrons, pions and muons. This test also featured a new digital readout system with 17 bits of dynamic range. The electron energy resolution is better than 1% at 5 GeV/c, and less than 0.5% at 60 GeV/c. The rejection factor for 40 GeV/c pions is estimated to be several hundred with 95% electron efficiency.
