Autor(es):
Lopes, L. 
; Pereira, A. ; Fonte, P. ; Marques, R. Ferreira
Data: 2007
Identificador Persistente: http://hdl.handle.net/10316/4377
Origem: Estudo Geral - Universidade de Coimbra
Assunto(s): High-rate
Detalhes do Documento
Accurate timing of gamma rays with high-rate Resistive Plate Chambers
Descrição
The counting rate capability of RPCs is strongly conditioned by the availability of suitable resistive materials for the electrodes. For time-of-flight measurements in heavy-ion high-energy physics, the extension of the counting rate capabilities achievable with glass electrodes, around 2 kHz/cm2, to much higher values is of fundamental importance. To address this issue we developed single-gap tRPCs with electrodes made from metal and from a commercially available ceramic material free of charge-depletion effects. Tests performed with 511 keV photons yielded a time resolution around 90 ps [sigma]. Neither the time resolution nor the efficiency have been affected by background rates of up to 20 kHz/cm2 produced with photons from an X-ray generator. The present result establishes the practical feasibility of accurate timing measurements with RPCs at rates up to 20 kHz/cm2, while keeping a time resolution below 100 ps [sigma]. http://www.sciencedirect.com/science/article/B6TJM-4MCW883-5/1/fcc92c6a2416f5c510774013efa35d6f
The counting rate capability of RPCs is strongly conditioned by the availability of suitable resistive materials for the electrodes. For time-of-flight measurements in heavy-ion high-energy physics, the extension of the counting rate capabilities achievable with glass electrodes, around 2 kHz/cm2, to much higher values is of fundamental importance. To address this issue we developed single-gap tRPCs with electrodes made from metal and from a commercially available ceramic material free of charge-depletion effects. Tests performed with 511 keV photons yielded a time resolution around 90 ps [sigma]. Neither the time resolution nor the efficiency have been affected by background rates of up to 20 kHz/cm2 produced with photons from an X-ray generator. The present result establishes the practical feasibility of accurate timing measurements with RPCs at rates up to 20 kHz/cm2, while keeping a time resolution below 100 ps [sigma]. http://www.sciencedirect.com/science/article/B6TJM-4MCW883-5/1/fcc92c6a2416f5c510774013efa35d6f
Tipo de Documento
Artigo
Idioma Inglês
Idioma Inglês
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