Development of an ASIC for Si/CdTe detectors in a radioactive substance visualizing system

Atsushi Harayama, Shinichiro Takeda, Goro Sato, Hirokazu Ikeda, Shin Watanabe, Tadayuki Takahashi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report on the recent development of a 64-channel analog front-end ASIC for a new gamma-ray imaging system designed to visualize radioactive substances. The imaging system employs a novel Compton camera which consists of silicon (Si) and cadmium telluride (CdTe) detectors. The ASIC is intended for the readout of pixel/pad detectors utilizing Si/CdTe as detector materials, and covers a dynamic range up to 1.4 MeV. The readout chip consists of 64 identical signal channels and was implemented with X-FAB 0.35μm CMOS technology. Each channel contains a charge-sensitive amplifier, a pole-zero cancellation circuit, a low-pass filter, a comparator, and a sample-hold circuit, along with a Wilkinson-type A-to-D converter. We observed an equivalent noise charge of ∼500 e- and a noise slope of ∼5 e-/pF (r.m.s.) with a power consumption of 2.1 mW per channel. The chip works well when connected to Schottky CdTe diodes, and delivers spectra with good energy resolution, such as ∼12 keV (FWHM) at 662 keV and ∼24 keV (FWHM) at 1.33 MeV.

Original languageEnglish
Pages (from-to)223-226
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume765
DOIs
Publication statusPublished - 2014 Nov 21

Fingerprint

Cadmium telluride
cadmium tellurides
application specific integrated circuits
Application specific integrated circuits
Full width at half maximum
Detectors
Silicon
Imaging systems
detectors
silicon
readout
cancellation circuits
Silicon detectors
Networks (circuits)
chips
Low pass filters
Gamma rays
FORTRAN
low pass filters
Poles

Keywords

  • Analog front-end
  • ASIC
  • Gamma ray
  • Si/CdTe

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

Development of an ASIC for Si/CdTe detectors in a radioactive substance visualizing system. / Harayama, Atsushi; Takeda, Shinichiro; Sato, Goro; Ikeda, Hirokazu; Watanabe, Shin; Takahashi, Tadayuki.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 765, 21.11.2014, p. 223-226.

Research output: Contribution to journalArticle

Harayama, Atsushi ; Takeda, Shinichiro ; Sato, Goro ; Ikeda, Hirokazu ; Watanabe, Shin ; Takahashi, Tadayuki. / Development of an ASIC for Si/CdTe detectors in a radioactive substance visualizing system. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2014 ; Vol. 765. pp. 223-226.
@article{2b2742438e6a49dc8d7c1917d2fcf943,
title = "Development of an ASIC for Si/CdTe detectors in a radioactive substance visualizing system",
abstract = "We report on the recent development of a 64-channel analog front-end ASIC for a new gamma-ray imaging system designed to visualize radioactive substances. The imaging system employs a novel Compton camera which consists of silicon (Si) and cadmium telluride (CdTe) detectors. The ASIC is intended for the readout of pixel/pad detectors utilizing Si/CdTe as detector materials, and covers a dynamic range up to 1.4 MeV. The readout chip consists of 64 identical signal channels and was implemented with X-FAB 0.35μm CMOS technology. Each channel contains a charge-sensitive amplifier, a pole-zero cancellation circuit, a low-pass filter, a comparator, and a sample-hold circuit, along with a Wilkinson-type A-to-D converter. We observed an equivalent noise charge of ∼500 e- and a noise slope of ∼5 e-/pF (r.m.s.) with a power consumption of 2.1 mW per channel. The chip works well when connected to Schottky CdTe diodes, and delivers spectra with good energy resolution, such as ∼12 keV (FWHM) at 662 keV and ∼24 keV (FWHM) at 1.33 MeV.",
keywords = "Analog front-end, ASIC, Gamma ray, Si/CdTe",
author = "Atsushi Harayama and Shinichiro Takeda and Goro Sato and Hirokazu Ikeda and Shin Watanabe and Tadayuki Takahashi",
year = "2014",
month = "11",
day = "21",
doi = "10.1016/j.nima.2014.05.030",
language = "English",
volume = "765",
pages = "223--226",
journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
issn = "0168-9002",
publisher = "Elsevier",

}

TY - JOUR

T1 - Development of an ASIC for Si/CdTe detectors in a radioactive substance visualizing system

AU - Harayama, Atsushi

AU - Takeda, Shinichiro

AU - Sato, Goro

AU - Ikeda, Hirokazu

AU - Watanabe, Shin

AU - Takahashi, Tadayuki

PY - 2014/11/21

Y1 - 2014/11/21

N2 - We report on the recent development of a 64-channel analog front-end ASIC for a new gamma-ray imaging system designed to visualize radioactive substances. The imaging system employs a novel Compton camera which consists of silicon (Si) and cadmium telluride (CdTe) detectors. The ASIC is intended for the readout of pixel/pad detectors utilizing Si/CdTe as detector materials, and covers a dynamic range up to 1.4 MeV. The readout chip consists of 64 identical signal channels and was implemented with X-FAB 0.35μm CMOS technology. Each channel contains a charge-sensitive amplifier, a pole-zero cancellation circuit, a low-pass filter, a comparator, and a sample-hold circuit, along with a Wilkinson-type A-to-D converter. We observed an equivalent noise charge of ∼500 e- and a noise slope of ∼5 e-/pF (r.m.s.) with a power consumption of 2.1 mW per channel. The chip works well when connected to Schottky CdTe diodes, and delivers spectra with good energy resolution, such as ∼12 keV (FWHM) at 662 keV and ∼24 keV (FWHM) at 1.33 MeV.

AB - We report on the recent development of a 64-channel analog front-end ASIC for a new gamma-ray imaging system designed to visualize radioactive substances. The imaging system employs a novel Compton camera which consists of silicon (Si) and cadmium telluride (CdTe) detectors. The ASIC is intended for the readout of pixel/pad detectors utilizing Si/CdTe as detector materials, and covers a dynamic range up to 1.4 MeV. The readout chip consists of 64 identical signal channels and was implemented with X-FAB 0.35μm CMOS technology. Each channel contains a charge-sensitive amplifier, a pole-zero cancellation circuit, a low-pass filter, a comparator, and a sample-hold circuit, along with a Wilkinson-type A-to-D converter. We observed an equivalent noise charge of ∼500 e- and a noise slope of ∼5 e-/pF (r.m.s.) with a power consumption of 2.1 mW per channel. The chip works well when connected to Schottky CdTe diodes, and delivers spectra with good energy resolution, such as ∼12 keV (FWHM) at 662 keV and ∼24 keV (FWHM) at 1.33 MeV.

KW - Analog front-end

KW - ASIC

KW - Gamma ray

KW - Si/CdTe

UR - http://www.scopus.com/inward/record.url?scp=84908349362&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84908349362&partnerID=8YFLogxK

U2 - 10.1016/j.nima.2014.05.030

DO - 10.1016/j.nima.2014.05.030

M3 - Article

VL - 765

SP - 223

EP - 226

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

SN - 0168-9002

ER -