Author/Authors :
S. Ottini-Hustache، نويسنده , , S. and Mazur، نويسنده , , C. and Auger، نويسنده , , F. and Musumarra، نويسنده , , A. and Alamanos، نويسنده , , N. and Cahan، نويسنده , , B. and Gillibert، نويسنده , , A. and Lagoyannis، نويسنده , , A. and Maillard، نويسنده , , O. and Pollacco، نويسنده , , E. and Sida، نويسنده , , J.L. and Riallot، نويسنده , , M.، نويسنده ,
Abstract :
A beam detector system, CATS (Chambre A Trajectoires de Saclay), was designed to provide event-by-event particle tracking in experiments with radioactive beams at GANIL. It consists of two low pressure multiwire proportionnal chambers with one plane of anode wires placed between two cathode planes (active area: 70×70 mm2), respectively segmented into 28 vertical or horizontal strips (2.54 mm wide). The anode wires deliver a time signal allowing a time of flight measurement with an accuracy between 440 ps and 1.2 ns, depending on the energy loss of incident particles in the detector. The cathode strips are individually read out and the position of incoming particles is reconstructed using a charge centroid finding algorithm. A spatial resolution of 400 μm (700 μm) was achieved during in beam experiment, with a counting rate of 1.5×105 (106) particles per second.
Keywords :
Low pressure multiwire proportionnal chambers , Exotic beam detectors , Stripped cathode charge read-out
