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

Journal Article · Fri Oct 01 00:00:00 EDT 2010 · Nuclear Instruments and Methods A

DOI:https://doi.org/10.1016/j.nima.2010.06.216· OSTI ID:1008175

J.V. Bennett, M. Kornicer, M.R. Shepherd, M.M. Ito

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 12-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.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1008175
• Report Number(s): JLAB-PHY-10-1315; DOE/OR/23177-1489; TRN: US201106%%318
• Journal Information: Nuclear Instruments and Methods A, Vol. 622, Issue 1; ISSN 0168-9002
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCURACY
AMPLITUDES
ANALOG-TO-DIGITAL CONVERTERS
DESIGN
PHOTOMULTIPLIERS
PHOTOTUBES
RESOLUTION
SAMPLING
TIME RESOLUTION