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Present and past activities

Physics prototype

A small prototype SiW ECAL was constructed to test the feasibility of such a SiW ECAL. It has a transverse size of 18x18 cm2, and 30 layers of silicon detectors. The silicon detectors were segmented with a granularity of 1x1 cm2, giving a total of around readout 10,000 channels.

This prototype was exposed to test beams during the years 2006-2008, at the physics laboratories at DESY, CERN and FNAL. It behaved as expected from GEANT4-based computer simulations developed within the group. It has therefore validated the general principles of such a detector.

Technological prototype

At present (2010) a second prototype is being constructed, which aims to address the issues connected with the production of a full-scale ECAL, and its integration into a full detector. This includes:

  • the mechanical structure (made of carbon fibre composite) needed to support the tungsten and silicon elements
  • the development of reasonably priced silicon sensors with improved characteristics
  • a new generation of very low power front-end electronics chips (which will treat the electronics signals from the silicon within the ECAL volume)
  • cooling systems to extract generated heat
  • a data acquisition system to read, save and analyse the collected data
This prototype will be tested in particle beams in the coming years (2011-)

-- DanielJeans - 17-Jun-2010

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Topic revision: r1 - 2010-06-17 - unknown
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