Author/Authors :
Auffray، نويسنده , , E. and Beckers، نويسنده , , T. and Bourotte، نويسنده , , J. and Chipaux، نويسنده , , R. and Commichau، نويسنده , , V. and Dafinei، نويسنده , , I. and Depasse، نويسنده , , P. and Djambazov، نويسنده , , L. and Dydak، نويسنده , , U. and El Mamouni، نويسنده , , H. and Fay، نويسنده , , J. and Felcini، نويسنده , , M. and Goyot، نويسنده , , M. and Haguenauer، نويسنده , , M. and Hangarter، نويسنده , , K. and Hillemanns، نويسنده ,
Abstract :
A cerium fluoride matrix composed of nine longitudinally segmented towers, approximately 25X0 long, has been tested in electron, muon and pion beams of momenta ranging from 10 to 150 GeV/c. The results are discussed in terms of light yield, electronic noise, energy and position resolution. In spite of serious imperfections in geometry and quality of some of the crystals, an electron energy resolution of ∼0.5% has been obtained with a silicon photodiode readout, for energies above 50 GeV. The performance of cerium fluoride in a beam, its high density, high light yield and fast response, radiation resistance and ruggedness make it a very good candidate for high-resolution calorimetry at future colliders. The best conditions for production of large high-quality crystals are being studied in several firms over the world. Many CeF3 crystals, 2 × 2 cm2 or 3 × 3 cm2 in cross section and up to 28 cm long, were received in 1994 from four companies, some of them with excellent light yield and radiation hardness.
