Validation of proposed cooling design for the TRT end-cap front-end electronics

This report demonstrates that the connectors between the TRT end-cap front-end electronics boards are not sufficient as a thermal passage for the heat generated by the electronics. Temperatures well above the specified limit have been measured. A new design with an additional heat duct between the ASDBLR board and the cooling pipes is presented. Temperature gradients resulting from the power dissipated in the front-end electronics affect the structure of the wheels and may cause mechanical deformations. Taking into account the rigidity of the materials and the estimated temperature gradients, it is shown that none of the mechanical parts will be affected by the thermal stresses and therefore no changes in the mechanical design are needed.