What is "calice"

Calice \Cal"ice\, n. [See Calice.] See Chalice.

early form of chalice (q.v.).

n. (obsolete form of chalice English)

The CALICE (CAlorimeter for LInear Collider Experiment) collaboration 1 is an R&D group of more than 280 physicists and engineers from around the world, working together to develop new, high performance detectors for high energy positron- electron (ee) experiments at future International Linear Collider (ILC). It is a part of the European EUDET project.

The physics requirements of a future TeV-scale ee machine, such as the ILC, demand extremely high performance calorimetry. This is best achieved using a finely segmented system that allows to reconstruct events using the so-called Particle Flow Approach (PFA).

The calorimeter systems for high energy physics experiments usually consist of three main subsystems: electromagnetic calorimeter (ECAL) to detect electromagnetic showers produced by electrons (or positrons) and photons, hadronic calorimeter (HCAL) to measure hadron-induced showers, and muon tracker (or so-called tail catcher) to identify highly penetrating particles such as muons.

CALICE has developed prototypes of the three main calorimetric subsystems of a future detector: an ECAL followed by an HCAL and a tail catcher/muon tracker (TCMT), and is evaluating the performance of alternative technological solutions within this combined system.

The collaboration studies the performance of such calorimeters within a long, detailed program for an ECAL and several options of high granular analogue and digital calorimeters with sensitive layers of gas or plastic scintillator. The Tile- subgroup 2 has built a 1 m steel/scintillator sandwich sampling hadronic calorimeter (HCAL) called physics prototype for study series in various test particle beams.

High granularity is achieved by 38 scintillator tile layers . Each layer is a 2- cm thick steel plate 90x90 cm followed by 0.5- cm scintillator plate that consists of more than 200 scintillator tiles.

The mosaic of the HCAL layers exhibits a hundred 3x3 cm tiles in the center, surrounded by a large area covered with 6x6 cm tiles and finally enclosed by a strip of 12x12 cm tiles. All these near 8000 tiles in total are read out individually by wavelength-shifter fibers which illuminate small Silicon Photomultiplier(SiPM) mounted on each tile and insensitive to large magnetic field.