In this work package transition radiation detectors (TRDs) and resistive plate chambers (RPCs), shall be optimized using novel materials and techniques.
The limits of free-running, un-triggered readout electronics architecture for interactions rates of the order of several MHz, will be explored.

Description of work and role of partners

Task 1. High counting rate two-dimensional position sensitive TRD and associated FEE

  • IFIN and WWU will design and construct TRD structures which will maximize the granularity, two-dimensional position resolution and electron/pion rejection factor and minimize the collection time and dead zones, aiming to a solution for large-area detectors with minimum dead zones, minimum number of layers for a given electron/pion discrimination power for high counting rate environment specific for next generation experiments.
  • JINR, WWU and IFIN will simulate TR production using the best models in order to find out the most efficient architecture for regular radiators in order to maximize the TRs which reach the active region of TRDs.
  • WWU and IFIN will construct and test the regular radiators with the most appropriate architecture based on the simulations results. In addition, a special effort will be made to construct large-area, self-supporting radiator structures.
  • IFIN and WWU will develop efficient algorithms for position reconstruction using the full information delivered by non-rectangular pads of the readout electrode.
  • IFIN will design time-over-threshold analog FEE based on ASIC technology and associated mother boards for electronic tests and its implementation on the TRD prototypes.
  • IFIN, GSI and WWU will perform integrated tests in terms of position resolution and electron/pion rejection factor using radioactive sources, cosmic rays and high energy hadron and electron beams.

Task 2. RPC Development for TOF applications

  • Narrow strip designs of the readout electrode with a strip pitch smaller than the typical avalanche image size will be explored by UHEI, IFIN and HZDR in order to find the best performing configuration in terms of timing and position resolution.
  • Novel low resistivity electrode materials (ceramics, semiconducting glass) are becoming available through HZDR and via Other Involved Institutions contacts (Tsinghua Univ., China). They will be used to combine high resolution with high rate performance.
  • The preamplifier-discriminator chip PADI developed during the HadronPhysics2 project represents an ideal component to realize an impedance-matched interface for a high performance digitization of the analog signals.
  • The signal integrity needs to be maintained by a carefully designed FEE board that preserves the quality of the very fast counter signals up to the discriminator. This work will be carried out in close collaboration between GSI and UHEI.
  • To adapt to modern data acquisition concept an interface will be developed to data driven readout engines like the CBM DAQ prototype. This requires a dedicated rate control of individual channels that will be implemented on the FEE boards or on the digitizer chip. Contributing institutions are GSI and UHEI.
  • Test of the prototype structures and readout interfaces will be carried out at GSI, HZDR, COSY and CERN and will be supported by all participating groups.

The HadronPhysics3 project is supported by the European Union
under the 7th Framework Capacities Programme in the area of Research Infrastructures (RI).