Author/Authors :
Moriya، نويسنده , , K. and Leckey، نويسنده , , J.P. and Shepherd، نويسنده , , M.R. and Bauer، نويسنده , , K. and Bennett، نويسنده , , D. and Egiyan، نويسنده , , H. and Frye، نويسنده , , J. and Gonzalez، نويسنده , , J. and Henderson، نويسنده , , S.J. and Lawrence، نويسنده , , D. and Mitchell، نويسنده , , R. and Smith، نويسنده , , E.S. and Smith، نويسنده , , P. and Somov، نويسنده , , A.، نويسنده ,
Abstract :
The performance of the GlueX Forward Calorimeter was studied using a small version of the detector and a variable energy electron beam derived from the Hall B tagger at Jefferson Lab. For electron energies from 110 MeV to 260 MeV, which are near the lower-limits of the design sensitivity, the fractional energy resolution was measured to range from 20% to 14%, which meets the design goals. The use of custom 250 MHz flash ADCs for readout allowed precise measurements of signal arrival times. The detector achieved timing resolutions of 0.38 ns for a single 100 mV pulse, which will allow timing discrimination of photon beam bunches and out-of-time background during the operation of the GlueX detector.
Keywords :
jefferson lab , GlueX , Calorimetry , Lead glass , Flash ADC
