Experimental evidence has been found for a filtering effect on the soft electron component in electromagnetic showers when combinations of low-Z and high-Z materials are used as absorbers. The filtering effect can be fully exploited to reduce the electromagnetic calorimeter response, making it possible to achieve the compensation condition in a Si/Fe+Pb calorimeter with an effective interaction length almost equal to that of Fe. The action of Fe on Pb, by modifying the critical energy during the electromagnetic shower development, leads to a yield of soft electrons (and very few photons) that are stopped in subsequent absorber layers and/or absorbed by the G10 plates. Recent measurements performed with an enlarged Si/Fe+Pb calorimeter support the idea; the authors have shown that an electromagnetic energy smaller than the hadronic energy is possible once particular FePb configurations are used
THE COMPENSATION CONDITION IN HADRON CALORIMETERS BY THE FILTERING EFFECT / E. BORCHI; M. BRUZZI;C. FURETTA;P. GIUBELLINO; F. LAMARCHE; F. LEMEILLEUR;C. LEROY; R.MACII;R. PALUDETTO;S. PENSOTTI;A. PENZO; L.RAMELLO;P.G. RANCOITA;L. RICCATI;A. SEIDMAN; L. VISMARA. - In: IEEE TRANSACTIONS ON NUCLEAR SCIENCE. - ISSN 0018-9499. - STAMPA. - 37:(1990), pp. 1186-1190. [10.1109/23.57364]
THE COMPENSATION CONDITION IN HADRON CALORIMETERS BY THE FILTERING EFFECT
BORCHI, EMILIO;BRUZZI, MARA;
1990
Abstract
Experimental evidence has been found for a filtering effect on the soft electron component in electromagnetic showers when combinations of low-Z and high-Z materials are used as absorbers. The filtering effect can be fully exploited to reduce the electromagnetic calorimeter response, making it possible to achieve the compensation condition in a Si/Fe+Pb calorimeter with an effective interaction length almost equal to that of Fe. The action of Fe on Pb, by modifying the critical energy during the electromagnetic shower development, leads to a yield of soft electrons (and very few photons) that are stopped in subsequent absorber layers and/or absorbed by the G10 plates. Recent measurements performed with an enlarged Si/Fe+Pb calorimeter support the idea; the authors have shown that an electromagnetic energy smaller than the hadronic energy is possible once particular FePb configurations are usedFile | Dimensione | Formato | |
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