Prototype studies for a forward EM calorimeter in ALICE

Understand

A forward electromagnetic calorimeter (FoCal) based on SiW technology is being considered as a possible upgrade to the ALICE detector.

• This device should in particular feature an extremely high granularity allowing gamma/pi0 discrimination out to very high momenta.
• The main option considered for the high granularity layers is the use of CMOS pixel sensors.
• We will discuss the motivation and design principles of the proposed calorimeter and will then focus on the experience gained with a full CMOS-pixel calorimeter prototype.