The Hadron Calorimeter Prototype Beam-test Results

Here We present here the beam-test results obtained with the HCAL Prototype exposed on the X7 beam line of the CERN SPS accelerator. The iron plate { scintillator tile sampling calorimeter has been tested in the beam momenta range 10 80 GeV/c. The measured energy, angular and coordinate dependences of the HCAL responce and resolution were found to be corresponding to the LHCb design requirements. The angular and X-Y coordinate uniformity have been checked and compared with stand-alone Monte-Carlo simulation program predictions. The radioactive source calibration procedure has been developed. The LED pulse system allows to monitor the short-term stability of the detector. New 40 MHz front-end electronics have been tested and compared with ordinary charge integrating ADC’s. The results of the rst combined calorimeter tests are also presented. The signal shapes have been studied for HCAL, instrumented with dierent ber types and were found to satisfy the LHCb performance requirements.