The Gas Cerenkov counters were built and are maintained by Yerevan, the University of Maryland, and Florida International University.

Armen Ketikyan has created a very detailed set of Web pages for the total absorption shower counter in the electron arm.

An overview and some basic operating instructions may be found in the shower counter section of the Hall A Operating manual.

For questions and problems, contact one of the shower counter responsibles.

Shower Counter Picture Gallery

• Assembly of bases for Preshower Counter
• Single Preshower Counter
• Preshower testing in EEL building at CEBAF
• Preshower counter on the subframe
• Assembly of Shower Counter