A detector designed to measure early particle showers has been
installed in front of the central CDF calorimeter at the Tevatron. This new
preshower detector is based on scintillator tiles coupled to
wavelength-shifting fibers read out by multi-anode photomultipliers and has
a total of 3,072 readout channels. The replacement of the old gas detector
was required due to an expected increase in instantaneous luminosity of the
Tevatron collider in the next few years. Calorimeter coverage, jet energy
resolution, and electron and photon identification are among the expected
improvements. The final detector design, together with the R&D studies that
led to the choice of scintillator and fiber, mechanical assembly, and
quality control are presented. The detector was installed in the fall 2004
Tevatron shutdown and is expected to start collecting colliding beam data by
the end of 2004. First measurements indicate a light yield of 12
photoelectrons/MIP, a more than two-fold increase over the design goals.
Return to top of page.
Go to Physics Results
Updated: Tuesday, 2005 January 04 12:45:39 CST automatically from input from Carol Picciolo