TRT prototype

 The TRT prototype has been implemented in the simulation with great care following the geometry and material composition in the prototype as described in section 5.1. In the material description the radiator is simulated as CH₂ with a density taking into account the relative volume of the foil with respect to the air in the radiator. The straw signal is simulated as described in section 5.6 with parameters for foil thickness, anode wire radius etc. taken from the parameters of the prototype. In fig. 5.15 is shown a view along the straws in the first TRT prototype module. The interchanging layers of straws and radiator can be seen as well as the positioning of the straws inside each layer minimising the layer-to-layer correlations in the drift-time measurements of the hits.

  

Figure 5.15: The first sector of the TRT prototype.