A Test of Lead Glass Shower Counters

Abstract
In order to design an electromagnetic shower calorimeter for the TRISTAN experiment, lead glass shower counters made of SF6 were tested with positron beams in Beam Line 19 at SLAC. The beam energy ranged over 2–17.5 GeV, and the energy resolution and beam position dependence of the pulse height were studied for lead glass blocks of various length. The effect of the light guide on the pulse height was clearly observed when the shower leaked into the glass light guide. The effect of the absorber, the wedge-shaped lead glass and a mesh-type photomultiplier were also tested.

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