A silicon photo-multiplier signal readout using strip-line and waveform sampling for Positron Emission Tomography.
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| Title: | A silicon photo-multiplier signal readout using strip-line and waveform sampling for Positron Emission Tomography. |
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| Authors: | Kim, H.1 heejongkim@uchicago.edu, Chen, C.-T.1, Eclov, N.1, Ronzhin, A.2, Murat, P.2, Ramberg, E.2, Los, S.2, Kao, C.-M.1 |
| Source: | Nuclear Instruments & Methods in Physics Research Section A. Sep2016, Vol. 830, p119-129. 11p. |
| Subjects: | Silicon, Photomultipliers, Photodetectors, Positron emission tomography, Wave analysis, Time-of-flight spectrometry |
| Abstract: | A strip-line and waveform sampling based readout is a signal multiplexing method that can efficiently reduce the readout channels while fully exploiting the fast time characteristics of photo-detectors such as the SiPM. We have applied this readout method for SiPM-based time-of-flight (TOF) positron emission tomography (PET) detectors. We have prototyped strip-line boards in which 8 SiPMs (pitch 5.2 mm) are connected by using a single strip-line, and the signals appearing at the ends of the strip-line are acquired by using the DRS4 waveform sampler at a nominal sampling frequency of 1–5 GS/s. Experimental tests using laser and LYSO scintillator are carried out to assess the performance of the strip-line board. Each SiPM position, which is inferred from the arrival time difference of the two signals at the ends of the strip-line, is well identified with 2.6 mm FWHM resolution when the SiPMs are coupled to LYSO crystals and irradiated by a 22 Na source. The average energy and coincidence time resolution corresponding to 511 keV photons are measured to be ∼32% and ∼510 ps FWHM, respectively, at a 5.0 GS/s DRS4 sampling rate. The results show that the sampling rate can be lowered to 1.5 GS/s without performance degradation. These encouraging initial test results indicate that the strip-line and waveform sampling readout method is applicable for SiPM-based TOF PET development. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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