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Multichannel FPGA based MVT system for high precision time (20~ps~RMS) and charge measurement
- Publication Year :
- 2017
-
Abstract
- In this article it is presented an FPGA based $M$ulti-$V$oltage $T$hreshold (MVT) system which allows of sampling fast signals ($1-2$ ns rising and falling edge) in both voltage and time domain. It is possible to achieve a precision of time measurement of $20$ ps RMS and reconstruct charge of signals, using a simple approach, with deviation from real value smaller than 10$\%$. Utilization of the differential inputs of an FPGA chip as comparators together with an implementation of a TDC inside an FPGA allowed us to achieve a compact multi-channel system characterized by low power consumption and low production costs. This paper describes realization and functioning of the system comprising 192-channel TDC board and a four mezzanine cards which split incoming signals and discriminate them. The boards have been used to validate a newly developed Time-of-Flight Positron Emission Tomography system based on plastic scintillators. The achieved full system time resolution of $\sigma$(TOF) $\approx 68$ ps is by factor of two better with respect to the current TOF-PET systems.<br />Comment: Accepted for publication in JINST, 10 pages, 8 figures
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1707.03565
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/1748-0221/12/08/P08001