Author/Authors :
Asakawa، نويسنده , , T and Hara، نويسنده , , K and Hata، نويسنده , , K and Kadotani، نويسنده , , T and Kawamoto، نويسنده , , H and Kikuchi، نويسنده , , T and Kim، نويسنده , , K. Kondo، نويسنده , , S.H and Kuwabara، نويسنده , , T and Okura، نويسنده , , M and Okutomi، نويسنده , , H and Sano، نويسنده , , M and Seiya، نويسنده , , Y and Shibayama، نويسنده , , T and Suzuki، نويسنده , , T and Takashima، نويسنده , , S and Takikawa، نويسنده , , K and Tanaka، نويسنده , , M and Tanaka، نويسنده , , Y and Uchida، نويسنده , , T and Watanabe، نويسنده , , T، نويسنده ,
Abstract :
The CDF Plug Upgrade electromagnetic (EM) calorimeter and the preshower detector consist of tile-fiber elements forming a projective tower geometry. Each of the 23 longitudinal layers is separated into 24 units in the azimuthal direction. Cosmic-ray tests as a quality control of these mechanically basic units, called the 15° units, were carried out since January 1995 and completed in June 1996. All the units amounting to a total 1200 units were processed. By using HAMAMASU R4125 for the photon readout, the average light yields were measured to be 5.8 and 21 photoelectrons for the EM and the preshower units, respectively. The light yield variation along the longitudinal layers of EM tower was measured to be 10%. A GEANT-simulation study using the results of the cosmic-ray tests was performed for a realistic calorimeter configuration. It was found that the simulated energy resolution was consistent with the requirement of ΔE/E=(16%)2/E+(1%)2 (E in GeV). Adding preshower response to EM response improved in particular the linearity of the calorimeter. It was possible to achieve the non-linearity of 1% level for energies in the range of 10–200 GeV.
