Performance of the PrimEx Electromagnetic Calorimeter

Conference · Mon Jun 05 00:00:00 EDT 2006

OSTI ID:892100

Kubantsev, M; Larin, I; Gasparian, A

We report the design and performance of the hybrid electromagnetic calorimeter consisting of 1152 PbWO{sub 4} crystals and 576 lead glass blocks for the PrimEx experiment at the Jefferson Laboratory. The detector was built for high precision measurement of the neutral pion lifetime via the Primakoff effect. Calorimeter installation and commissioning was completed with the first physics run in fall of 2004. We present the energy and position resolution of the calorimeter. Obtained {pi}{sup 0} mass resolution of 1.3 MeV/c{sup 2} and its production angle resolution of 0.34 mrad demonstrate the ability of the experiment to extract the {pi}{sup 0} lifetime on one percent level.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE - Office of Energy Research (ER)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 892100
• Report Number(s): JLAB-PHY-06-528; DOE/ER/40150-4048; physics/0609201; TRN: US0605548
• Resource Relation: Conference: CALOR06, Chicago, IL, June 5, 2006
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCURACY
CALORIMETERS
CEBAF ACCELERATOR
COMMISSIONING
DESIGN
GLASS
LIFETIME
MASS RESOLUTION
PERFORMANCE
PHYSICS
PIONS
PRIMAKOFF EFFECT
PRODUCTION
RESOLUTION