Abstract
This paper presents experimental results on the timing resolution achieved with a 5 mm thick HgI2 detector. The timing information was derived based on the cathode pre-amplifier pulse waveform, measured using a digital oscilloscope. The times of interaction were estimated by fitting the measured pulse waveforms to pre-defined waveform models. With this approach, problems related to the conventional leading edge or constant fraction triggering, such as slow charge carrier mobility, pulse shape variation and depth-dependent detector response can be greatly reduced. As a result, we showed a 13 ns timing resolution measured using the 5 mm thick HgI2 detector and a BaF2 coincidence detector with 511 keV full energy events. In this paper, we discuss several waveform models and the results achieved using these models.
Original language | English (US) |
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Pages (from-to) | 234-251 |
Number of pages | 18 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 545 |
Issue number | 1-2 |
DOIs | |
State | Published - Jun 11 2005 |
Externally published | Yes |
Keywords
- Large volume HgI detector
- Pulse waveform
- Timing resolution
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation