27 September 2015 to 3 October 2015
Kobe, Fashion Mart, Japan
Japan timezone

Detector R&D of the Forward Calorimeter with PAD readout for the ALICE upgrade

29 Sept 2015, 16:30
2h
Exhibition space 3 & 4

Exhibition space 3 & 4

Board: 1309
Poster Future Experimental Facilities, Upgrades, and Instrumentation Poster Session

Speaker

Masahiro Hirano (University of Tsukuba (JP))

Description

FoCal is a proposed upgrade project for the ALICE experiment at LHC to study the initial state of the high-energy heavy-ion collisions. FoCal com- prises two calorimeters: an electro-magnetic calorimeter (FoCal-E) to mea- sure the direct photons is complemented by a hadron calorimeter (FoCal- H) to improve isolation and jet measurements. FoCal-E consists of low- granularity silicon-pad (PAD) modules and high-granularity silicon-pixel (Monolithic Active Pixel Sensors: MAPS) modules, and has been designed as a Si+W sampling calorimeter. In the current design, the FoCal-E structure consists of four PAD modules and two MAPS modules. The main purpose of the MAPS modules is the precise location of the position of the shower and the two-shower separation, while the PAD modules are essential for a good measurement of the shower energy. One PAD module has four layers each consisting of a tungsten tile and an 8x8 silicon photodiode(of size 11.3x11.3 mm2) array, respectively. The summed signal of four photodiode cells in same lateral position is read out via a summing board and APV25 hybrid chips. In this presentation, we show the detector performance of FoCal-E PAD sys- tem, which has been evaluated in two test beam experiment at CERN PS and SPS test beam lines in September and November in 2014, respectively. Energy resolution, linearity in energy, and position resolution have been mea- sured at these beam tests. We also present an outlook and the current status of faster readout system for the FoCal-E PAD using the SRS and VMM chips.
On behalf of collaboration: [Other]

Primary author

Masahiro Hirano (University of Tsukuba (JP))

Co-authors

Motoi Inaba (University of Tsukuba (JP)) Tatsuya Chujo (University of Tsukuba (JP))

Presentation materials