Shower Maximum Detector for STAR FPD Upgrade
The shower maximum detector (SMD) accurately measures
both deposited energy and the transverse profile of the electromagnetic
shower. These measurements are critical to identifying high-energy
particles decaying to photons. A typical event from the prototype
FPD used during RHIC run 2 is shown here.
The shower maximum detector is assembled from extruded triangular
scintillator strips with a co-extruded hole for insertion of a wave-length
shifting optical fiber, used for light collection. A test set up
of the SMD for the FPD is shown below.
for larger version)
Multi-anode photomultiplier tubes
Last Update: 18 October 2002