Precision timing measurement of phototube pulses using a flash analog-to-digital converter

Details Precision timing measurement of phototube pulses using a flash analog-to-digital converter Precision timing measurement of phototube pulses using a flash analog-to-digital converter

2010-05-28

arxiv.org/abs/1005.5349v1

Nucl.Instrum.Meth.A622:225-230,2010

Physics

Instrumentation and Detectors

Scientific paper

10.1016/j.nima.2010.06.216

We present the timing characteristics of the flash ADC readout of the GlueX forward calorimeter, which depends on precise measurement of arrival time of pulses from FEU 84-3 photomultiplier tubes to suppress backgrounds. The tests presented were performed using two different 250 MHz prototype flash ADC devices, one with eight-bit and one with twelve-bit sampling depth. All measured time resolutions were better than 1 ns, independent of signal size, which is the design goal for the GlueX forward calorimeter. For pulses with an amplitude of 100 mV the timing resolution is 0.57 +- 0.18 ns, while for 500 mV pulses it is 0.24 +- 0.08 ns.

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