Author/Authors :
Blanco، نويسنده , , Juan A. and Cabanelas، نويسنده , , P. and Belver، نويسنده , , D. and Castro، نويسنده , , E. and Diaz، نويسنده , , J. and Fonte، نويسنده , , P. and Gil، نويسنده , , Sérgio A. C. Garzon، نويسنده , , J.A. and Gonzalez-Diaz، نويسنده , , Thuy D. and Heinz، نويسنده , , T. and Koenig، نويسنده , , W. and Lopes، نويسنده , , L. and Muentz، نويسنده , , C. and Palka، نويسنده , , M. and Pietraszko، نويسنده , , J. and Rustamov، نويسنده , , A. and Schwab، نويسنده ,
Abstract :
A full size prototype of the new inner High-Acceptance DiElectron Spectrometer (HADES)-TOF wall based on Resistive Plate Chambers (RPCs) was mounted and exposed to secondaries from C reactions on Be and Nb targets at 2 AGeV kinetic energy and typical HADES particle fluxes. The tested sextant is constituted by 187 individual 4-gap glass–aluminium shielded RPC cells distributed in three columns and two layers, covering an area of 1.26 m 2 .
rage timing resolution of 73 ps σ was measured with 99 % intrinsic efficiency, on a random location, and moderate timing tails, along with an average longitudinal position resolution of 7.7 mm σ , in the range from a few Hz / cm 2 up to 80 Hz / cm 2 without noticeable degradation of performance. Additionally, the matching efficiency was estimated using the tracking system of HADES, yielding an average value of 97.5%.
Keywords :
Gaseous detectors , timing , TOF , RPC , HADES
