• A new mechanical design was implemented for the CREAM-2 calorimeter. Each Tungsten plate is glued into a Carbon fiber composite frame. The aim is to achieve a modular structure of completely independent light-tight elements. The building block is the assembly of two consecutive X-Y layers. Superlayers consist of 4 calorimeter layers each. The disassembly of the calorimeter can be done by breaking the calorimeter into superlayers or X-Y layer pairs. (picture below)

Scintillating fibers are assembled into 1cm wide ribbons (top and bottom right) and glued into the acrylic light-guides (left). (pictures below)

• Two calorimeter layers equipped with 50 fibers ribbons each (orthogonal views).(picture below)

• Clear fiber bundles (48 fibers/bundle) are assembled into the connector (cookie) which provides the optical coupling of the clear fibers with the HPD pixels. One of the 3 LED's used for the HPD pixels alignment is visible (top and bottom right) (picture below)

• The optical fiber bundles are glued to the light guides using a vertical fixture which allows up to 4 layers to be cured at a time. (picture below)

• Final assembly of one X-Y pair of layers.(picture below)

• The calorimeter stack during the final assembly. (next 4 pictures)

• The CREAM-2 calorimeter (20 radiation lengths) fully assembled with 40 HPDs and the read-out electronics on top the the CREAM honeycomb pallet (July 2003). (picture below)

• A particular showing how the clear fiber bundles are inserted into the light-tight modular structure of the calorimeter. (picture below)

• CREAM-2 calorimeter at CERN H2 beam during the September 2003 test. (picture below)

• Online event display of the imaging calorimeter showing narrow e.m. showers generated by the electron beam. (picture below)

• Raw data (uncalibrated) display of the total energy distribution with 200 GeV electrons.(picture below)