Related Experiment Video
Updated: Apr 19, 2026
09:59
Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors
Published on: June 23, 2018
8.3K
A Simple Capacitive Charge-Division Readout for Position-Sensitive Solid-State Photomultiplier Arrays.
Junwei Du1, Jeffrey P Schmall1, Yongfeng Yang1
1Department of Biomedical Engineering, University of California, Davis, CA 95616, USA.
IEEE Transactions on Nuclear Science
|January 6, 2015
Summary
This study introduces a capacitive charge-division readout method for position-sensitive solid-state photomultipliers (PS-SSPMs). The technique reduces electronic channels from 20 to 5, maintaining detector performance for improved signal processing.
Area of Science:
- Nuclear Instrumentation and Detectors
- Signal Processing
- Solid-State Physics
Background:
- Position-sensitive solid-state photomultipliers (PS-SSPMs) are crucial for high-resolution radiation detection.
- Traditional readout methods for PS-SSPM arrays require a large number of electronic channels, increasing complexity and cost.
- Analog multiplexing offers a potential solution to reduce channel count while preserving signal integrity.
Purpose of the Study:
- To design and evaluate a capacitive charge-division readout method for a 2x2 array of PS-SSPMs.
- To assess the impact of analog multiplexing on signal-to-noise ratio (SNR), energy resolution, and timing resolution.
- To determine the minimum resolvable crystal size using the developed readout method.
Main Methods:
- Implemented a capacitive charge-division analog multiplexing technique to reduce 20 signals (16 position, 4 timing) to 5 signals (4 position, 1 timing).
- Evaluated SNR and flood histogram quality across various bias voltages (27.5 V to 32.0 V) and a fixed temperature (0 °C) using LSO crystal arrays.
- Measured timing resolution at a fixed bias voltage (31.0 V) and temperature (0 °C), comparing performance with different capacitor values and tolerances.
Main Results:
- The capacitive charge-division method successfully reduced the number of electronic channels from 20 to 5.
- Optimal performance, including SNR of 24.3, energy resolution of 18.2%, and timing resolution of 8.8 ns, was achieved using 0.2 nF capacitors with 1% tolerance.
- The readout method preserved the high spatial resolution of the PS-SSPM array, enabling the identification of 0.7 mm crystals.
Conclusions:
- The capacitive charge-division analog signal processing method effectively reduces electronic channel requirements for PS-SSPM arrays.
- This technique maintains excellent detector performance, including spatial, energy, and timing resolution.
- The method facilitates the use of global positioning and allows for the detection of smaller crystal elements, enhancing detector capabilities.
Related Concept Videos
01:25MOS Capacitor
1.9K
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
1.9K
01:29Determination of Crystal Structures
124
In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
124