Author/Authors :
Cusanno، نويسنده , , F. and Cisbani، نويسنده , , E. and Colilli، نويسنده , , S. and Crateri، نويسنده , , R. and Fratoni، نويسنده , , R. and Frullani، نويسنده , , S. and Garibaldi، نويسنده , , F. and Giuliani، نويسنده , , F. and Gricia، نويسنده , , M. and Lucentini، نويسنده , , M. and Mostarda، نويسنده , , A. and Santavenere، نويسنده , , F. and Veneroni، نويسنده , , P. L. Breuer، نويسنده , , H. and Iodice، نويسنده , , M. and Urciuoli، نويسنده , , G.M. and De Cataldo، نويسنده , , G. A. De Leo، نويسنده , , R. and Lagamba، نويسنده , , L. and Braem، نويسنده , , A.، نويسنده ,
Abstract :
A proximity focusing freon/CsI RICH detector has been built for kaon physics at Thomas Jefferson National Accelerator Facility (TJNAF or Jefferson Lab), Hall A. The Cherenkov photons are detected by a UV photosensitive CsI film which has been obtained by vacuum evaporation. A dedicated evaporation facility for large area photocathodes has been built for this task. A measuring system has been built to allow the evaluation of the absolute quantum efficiency (QE) just after the evaporation. The evaporation facility is described here, as well as the quantum efficiency measurement device. Results of the QE on-line measurements, for the first time on large area photocathodes, are reported.
Keywords :
Photocathode , Quantum efficiency measurements , RICH detector , CSI
