Speaker
Maximilien Chefdeville
(LAPP, Annecy)
Description
The design of calorimeter systems for a detector at a future Linear Collider
(ILC, CLIC) is largely driven by the requirements of jet reconstruction. The
particle flow technique has been shown to be capable of achieving an energy
resolution ~30%/sqrtE, permitting the discrimination of W and Z bosons in their
hadronic decays. Such performance requires the separation of neutral and
charged energy deposits in the calorimeters, which in turn demands that they
have high spatial granularity both transversely and longitudinally, and be placed
within the magnet coil.
CALICE has been developing prototype calorimeters to meet these requirements.
The electromagnetic calorimeter is based on tungsten absorber read out using
either silicon pads of ~5x5 mm^2 and/or crossed short scintillator strips of
~5x45 mm^2. The hadronic calorimeter could use iron or tungsten absorber,
sampled using either scintillator tiles of ~3x3 cm^2 or gaseous detectors with
~1x1 cm^2 readout. The scintillator option uses analogue readout, while the gas
detectors (RPCs, Micromegas or GEMs) use either digital (1 bit) or semi-digital
(2 bit) readout. All these options are being pursued in CALICE. Key issues
include: extreme compactness (so that the calorimeters can be located inside the
magnet), hermeticity and scalability, power cycling (exploiting the time
structure of the accelerator to minimise the need for cooling), and precise
timing (especially for CLIC applications). We report on recent R&D and test
beam activities from CALICE which address all these key questions.
Primary author
Maximilien Chefdeville
(LAPP, Annecy)
