Update on mechanical structure for the ENDCAP calorimeter

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Presentation transcript:

Update on mechanical structure for the ENDCAP calorimeter

mechanical properties of LYSO mechanical structure for EMC forward Status report on: mechanical properties of LYSO mechanical structure for EMC forward Test to measure elastic properties along cut direction. Non destructive measurement of the elastic module Via ultrasounds qualitative investigation of crystals high anisotropy has been observed 2) Quantitative measurements with Laser vibrometer for Laser Doppler Vibrometry (LDV) Hammer with charge amplifier Measurement of the velocity of the propagation of the perturbation induced by the hammer along the longitudinal dimension of the crystal 4200m/s --> 131 12 GPa what does it means??? Destructive test are ongoing in these days to study to study resistance to stress and breaking points.

It is very important in the simulation of the geometry to take into account the gap between crystals that has to be filled with the structure. Deformation of the structure < gap between edge of the crystal and structure itself It is possible to build CFC structure 100um thick If structure is 1/10 mm  tolerance 1/100 mm Same or even better tolerance between modules (5x5 crystals) related also to the positioning of the module on the structure. Geometry now takes into account 400um between crystals and 400um between modules

Support behind calorimeter in Babar 2 Support behind calorimeter in Babar 2.5 cm thick, is this also a mechanical support for the IFR? If yes discuss with them the project for the new support. If APD will be used to read crystals, a study for the thermal control is necessary (cooling system), what about FE electronics in terms of space? Project and design for the module of the beam test: better to have it of the same dimension as in the whole calorimeter (5x5), it can be used ad prototype. Contact industry for construction of CFC (we can have a list of name) Simulation of CFC different from other mechanical simulation: stratification of material and at the same time study of the property of the material and then tuning