Forward Instrumentation for ILC Detectors
Halina Abramowicz, Angel Abusleme, Konstantin Afanaciev, Jonathan, Aguilar, Prasoon Ambalathankandy, Philip Bambade, Matthias Bergholz, Ivanka, Bozovic-Jelisavcic, Elena Castro, Georgy Chelkov, Cornelia Coca, Witold, Daniluk, Angelo Dragone, Laurentiu Dumitru, Konrad Elsener

TL;DR
This paper presents the design, simulation, and prototype development of specialized forward calorimeters for the ILC detector, focusing on precise luminosity measurement and beam parameter determination in a high-radiation environment.
Contribution
It introduces optimized, radiation-hard, finely segmented calorimeters with fast electronics for the ILC, including sensor and ASIC prototypes and performance results.
Findings
Calorimeter prototypes meet performance requirements
Sensors demonstrate radiation hardness
Electronics achieve fast readout suitable for high occupancy
Abstract
Two special calorimeters are foreseen for the instrumentation of the very forward region of the ILC detector, a luminometer designed to measure the rate of low angle Bhabha scattering events with a precision better than 10-3 and a low polar angle calorimeter, adjacent to the beam-pipe. The latter will be hit by a large amount of beamstrahlung remnants. The amount and shape of these depositions will allow a fast luminosity estimate and the determination of beam parameters. The sensors of this calorimeter must be radiation hard. Both devices will improve the hermeticity of the detector in the search for new particles. Finely segmented and very compact calorimeters will match the requirements. Due to the high occupancy fast front-end electronics is needed. The design of the calorimeters developed and optimised with Monte Carlo simulations is presented. Sensors and readout electronics ASICs…
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