41 research outputs found
Performance of the Electromagnetic Pixel Calorimeter Prototype EPICAL-2
The first evaluation of an ultra-high granularity digital electromagnetic
calorimeter prototype using 1.0-5.8 GeV/c electrons is presented. The
pixel detector consists of 24 layers of ALPIDE CMOS MAPS
sensors, with a pitch of around 30~m, and has a depth of almost 20
radiation lengths of tungsten absorber. Ultra-thin cables allow for a very
compact design. The properties that are critical for physics studies are
measured: electromagnetic shower response, energy resolution and linearity. The
stochastic energy resolution is comparable with the state-of-the art resolution
for a Si-W calorimeter, with data described well by a simulation model using
GEANT and Allpix. The performance achieved makes this technology a good
candidate for use in the ALICE FoCal upgrade, and in general demonstrates the
strong potential for future applications in high-energy physics.Comment: 30 pages, 19 figures, submitted to JINS
Performance of the electromagnetic pixel calorimeter prototype Epical-2
The first evaluation of an ultra-high granularity digital electromagnetic calorimeter prototype using 1.0-5.8 GeV/c electrons is presented. The 25 × 106 pixel detector consists of 24 layers of ALPIDE CMOS MAPS sensors, with a pitch of around 30 μm, and has a depth of almost 20 radiation lengths of tungsten absorber. Ultra-thin cables allow for a very compact design. The properties that are critical for physics studies are measured: electromagnetic shower response, energy resolution and linearity. The stochastic energy resolution is comparable with the state-of-the art resolution for a Si-W calorimeter, with data described well by a simulation model using Geant4 and Allpix2. The performance achieved makes this technology a good candidate for use in the ALICE FoCal upgrade, and in general demonstrates the strong potential for future applications in high-energy physics