Multi-Level Time-Over-Threshold Method for Energy Resolving Multi-Channel Systems

Author

Fujiwara, Takeshi ; Takahashi, Hiroyuki ; Shimazoe, Kenji ; Shi, Boxuan

Author_Institution

Dept. of Nucl. Eng. & Manage., Univ. of Tokyo, Tokyo, Japan

Volume

57

Issue

5

fYear

2010

Firstpage

2545

Lastpage

2548

Abstract

Pixellated radiation detectors require an energy resolving multichannel system. The time-over-threshold (ToT) method provides an inexpensive way to energy-resolving signal processing. However, the conventional, single-threshold ToT method suffers from a small dynamic range and poor linearity. We have studied linearity in a ToT system for typical shaping filters and propose a new, multi-level, ToT scheme. This method provides higher linearity and wider dynamic range. We have analyzed the typical signal cases of triangular, CR-RC, and Semi-Gaussian filters, and achieved a linearity of less ≤3% in Integral Non-Linearity (INL).

Keywords

Gaussian channels; filtering theory; image segmentation; particle detectors; ToT system linearity; energy resolving multichannel system; energy resolving signal processing; integral nonlinearity; multilevel time over threshold method; pixellated radiation detectors; semiGaussian filters; shaping filters; single threshold ToT method; Dynamic range; Energy resolution; Linearity; Shape; Signal resolution; Time measurement; Multi-channel systems; time over threshold;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2010.2061236

Filename

5603555