Author/Authors :
Autiero، نويسنده , , D. and Baldo-Ceolin، نويسنده , , M. and Bobisut، نويسنده , , F. and Camilleri، نويسنده , , Deepak L. and Cattaneo، نويسنده , , P.W. and Cavasinni، نويسنده , , V. and Collazuol، نويسنده , , G.M. and Conforto، نويسنده , , G. and Conta، نويسنده , , C. and Contalbrigo، نويسنده , , M. and Del Prete، نويسنده , , T. and De Santo، نويسنده , , A. and Di Lella، نويسنده , , L. and Ferrari، نويسنده , , R. and Flaminio، نويسنده ,
Abstract :
The transverse shower shape of the energy deposition of hadrons in the NOMAD lead glass calorimeter has been studied by exposing a prototype of this calorimeter to pion test beams of various momenta and incident angles. Large event-to-event fluctuations in the shower shape and significant energy depositions far from the incident hadron were observed making it difficult to associate all the deposited energy to the incident hadron that caused it. Since in the NOMAD detector the momenta of charged hadrons are measured by a magnetic spectrometer, such an association is necessary to be able to subtract from the calorimeter all the energy caused by the observed charged hadrons in order to avoid double counting.
ility functions based on the measurements have been developed to describe fluctuations of the lateral shower shape. Starting from these functions, an algorithm is developed for identifying the energy deposition associated to a charged hadron. The identification and separation of overlapping showers based on these functions is also discussed. The Monte Carlo simulation of the calorimeter reproduces the test beam data well therefore allowing the application of the algorithm at angles and momenta not studied in the test beam.
