Session Number

R910

Advisor(s)

Jin-Yuan Wu, Fermi National Accelerator Laboratory

Location

B-206 Lecture Hall

Start Date

28-4-2016 11:05 AM

End Date

28-4-2016 11:30 AM

Disciplines

Physics

Abstract

The purpose of this investigation is to discover critical experimental factors that could lead to the variation of time measurement by a time-to-digital converter (TDC) implemented on field-programmablegate- array (FPGA). Two pulses were generated by a pulse generator, and the second pulse was given a 20 nanoseconds delay. In an ideal experiment, the mean of the entry data would have been 20 nanoseconds since the two channels (8,c) obtained pulses that were given the same delay. However, due to device errors and quantization errors, which is produced during analog-to-digital conversion, time difference between hits varied from 22.1 to 22.7 nanoseconds. The top test results have shown that the time measurement better than 80 picoseconds was obtained for more than ten tests. FPGA can be used as a base gadget to improve TDC resolution, and although still at the state of development, this particular application will continue to develop and ultimately improve resolutions of Positron Emission Tomography scanners (PET scanner) and future medical imaging.

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Apr 28th, 11:05 AM Apr 28th, 11:30 AM

Field-Programmable-Gate-Array Implemented on Time-to-Digital Converter: Improving its Resolution

B-206 Lecture Hall

The purpose of this investigation is to discover critical experimental factors that could lead to the variation of time measurement by a time-to-digital converter (TDC) implemented on field-programmablegate- array (FPGA). Two pulses were generated by a pulse generator, and the second pulse was given a 20 nanoseconds delay. In an ideal experiment, the mean of the entry data would have been 20 nanoseconds since the two channels (8,c) obtained pulses that were given the same delay. However, due to device errors and quantization errors, which is produced during analog-to-digital conversion, time difference between hits varied from 22.1 to 22.7 nanoseconds. The top test results have shown that the time measurement better than 80 picoseconds was obtained for more than ten tests. FPGA can be used as a base gadget to improve TDC resolution, and although still at the state of development, this particular application will continue to develop and ultimately improve resolutions of Positron Emission Tomography scanners (PET scanner) and future medical imaging.

 

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