The CDF Plug Upgrade calorimeter, which fully exploits the
time-fiber technique, was tested at the Fermilab meson beamline. The
calorimeter was exposed to positron, positively charged pion and positive
muon beams with energies in the range of 5-230 GeV. The energy resolution
of the electromagnetic calorimeter to the positron beam is consistent with
the design value of 16%/sqrt E \oplus 1%, where E is the energy in units of
GeV and \oplus represents sum in quadrature. The non-linearity for
positrons is studied in an energy range of 11-181 GeV. It is important to
incorporate the response of the preshower detector, the first layer of the
electromagnetic calorimeter which is read out separately, into that of the
calorimeter to reduce the non-linearity to 1% or less. The energy scale is
about 1.46 pC/GeV with HAMAMATSU R4125 operated typically at a gain of 2.5 x
104. The response non-uniformity over the surface of a tower of the
electromagnetic calorimeter is found to be about 2% with 57 GeV positrons.
Studies of several detailed detector characteristics are also presented.
Return to top of page.
Go to Physics Results
Updated: Friday, 2001 April 06 16:28:04 CDT automatically from input from Carol Picciolo