An inexpensive large area shower detector with high spatial and energy resolution

A 59-layer lead-liquid scintillator shower detector has been tested in an electron beam at SLAC. The energy resolution is about 9%/√E. The detector is optically segmented into counters by means of thin, teflon-coated, bent aluminum panels. The position of the shower is determined to a precision of a few mm by comparing the relative sizes of the signals from neighboring counters.