Pulse Pileup Analysis for a Double-Sided Silicon Strip Detector Using Variable Pulse Shapes

Wang J, Chen L, Persson M, Rajbhandary PL, Kandlakunta P, Carini G, Fahrig R (2019)

Publication Type: Journal article

Publication year: 2019

Journal

IEEE Transactions on Nuclear Science Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 66

Pages Range: 960-968

Journal Issue: 6

DOI: 10.1109/TNS.2019.2917144

Abstract

Due to pulse pileup, photon counting detectors (PCDs) suffer from count loss and energy distortion when operating in high count rate environments. In this paper, we studied the pulse pileup of a double-sided silicon strip detector (DSSSD) to evaluate its potential application in a mammography system. We analyzed the pulse pileup using pulses of varied shapes, where the shape of the pulse depends on the location of photon interaction within the detector. To obtain the shaped pulses, first, transient currents for photons interacting at different locations were simulated using a Technology Computer-Aided Design (TCAD) software. Next, the currents were shaped by a CR-RC2 shaping circuit, calculated using Simulink. After obtaining these pulses, both the different orders of pileup and the energy spectrum were calculated by taking into account the following two factors: 1) spatial distribution of photon interactions within the detector and 2) time interval distribution between successive photons under a given photon flux. We found that for a DSSSD with a thickness of 300 mu m, a pitch of 25 mu m, and a strip length of 1 cm, under a bias voltage of 50 V, the variable pulse shape model predicts that the fraction free of pileup can be >90% under a photon flux of 3.75 Mcps/mm(2) (million counts per second per square mm). The DSSSD is a promising candidate for digital mammography applications.

Authors with CRIS profile

Rebecca Fahrig Technische Fakultät

Involved external institutions

Ohio State University US United States (USA) (US) Stanford University US United States (USA) (US) Stanford National Accelerator Laboratory (SLAC) US United States (USA) (US)

How to cite

APA:

Wang, J., Chen, L., Persson, M., Rajbhandary, P.L., Kandlakunta, P., Carini, G., & Fahrig, R. (2019). Pulse Pileup Analysis for a Double-Sided Silicon Strip Detector Using Variable Pulse Shapes. IEEE Transactions on Nuclear Science, 66(6), 960-968. https://dx.doi.org/10.1109/TNS.2019.2917144

MLA:

Wang, Jinghui, et al. "Pulse Pileup Analysis for a Double-Sided Silicon Strip Detector Using Variable Pulse Shapes." IEEE Transactions on Nuclear Science 66.6 (2019): 960-968.

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