Compton imaging with thick Si and CZT detectors

Mythili Subramanian; Eric A. Wulf; Bernard Phlips; Henric Krawczynski; Jerrad Martin; Paul Dowknott

doi:10.1016/j.nima.2012.04.011

Compton imaging with thick Si and CZT detectors

Mythili Subramanian
, Eric A. Wulf
, Bernard Phlips
, Henric Krawczynski
, Jerrad Martin
, Paul Dowknott

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

A Compton imaging telescope has been constructed using a 0.2 cm thick Silicon (Si) detector of active area 9.0×9.0 cm ² and a pixelated Cadmium Zinc Telluride (CZT) detector of dimensions 2.0×2.0×0.5 cm ³. The Si detector is double sided with 64 strips per side in two orthogonal directions. The CZT detector has 64 pixels of pitch 0.25 cm. We used several ASICs (32 channel) to read out both detectors. A ¹³⁷Cs source was used in the study. The energy deposited in the Si and CZT detectors and the points of interaction of the γ-ray in both detectors were read out. We varied the position of the source as well as the vertical separation between the Si and CZT detectors and measured the angular resolution of the source image for the different configurations. The best angular resolution (1σ) was 2.4°. Monte Carlo simulations were run for similar detector configurations and agree with the experimental results.

Original language	English
Pages (from-to)	79-84
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	682
DOIs	https://doi.org/10.1016/j.nima.2012.04.011
State	Published - Aug 1 2012

Keywords

γ-ray
Compton telescope
Monte Carlo simulations
Si and CZT detector

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10.1016/j.nima.2012.04.011

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@article{677b12a756be451a9c5822331aa033b8,

title = "Compton imaging with thick Si and CZT detectors",

abstract = "A Compton imaging telescope has been constructed using a 0.2 cm thick Silicon (Si) detector of active area 9.0×9.0 cm 2 and a pixelated Cadmium Zinc Telluride (CZT) detector of dimensions 2.0×2.0×0.5 cm 3. The Si detector is double sided with 64 strips per side in two orthogonal directions. The CZT detector has 64 pixels of pitch 0.25 cm. We used several ASICs (32 channel) to read out both detectors. A 137Cs source was used in the study. The energy deposited in the Si and CZT detectors and the points of interaction of the γ-ray in both detectors were read out. We varied the position of the source as well as the vertical separation between the Si and CZT detectors and measured the angular resolution of the source image for the different configurations. The best angular resolution (1σ) was 2.4°. Monte Carlo simulations were run for similar detector configurations and agree with the experimental results.",

keywords = "γ-ray, Compton telescope, Monte Carlo simulations, Si and CZT detector",

author = "Mythili Subramanian and Wulf, \{Eric A.\} and Bernard Phlips and Henric Krawczynski and Jerrad Martin and Paul Dowknott",

year = "2012",

month = aug,

day = "1",

doi = "10.1016/j.nima.2012.04.011",

language = "English",

volume = "682",

pages = "79--84",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

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TY - JOUR

T1 - Compton imaging with thick Si and CZT detectors

AU - Subramanian, Mythili

AU - Wulf, Eric A.

AU - Phlips, Bernard

AU - Krawczynski, Henric

AU - Martin, Jerrad

AU - Dowknott, Paul

PY - 2012/8/1

Y1 - 2012/8/1

N2 - A Compton imaging telescope has been constructed using a 0.2 cm thick Silicon (Si) detector of active area 9.0×9.0 cm 2 and a pixelated Cadmium Zinc Telluride (CZT) detector of dimensions 2.0×2.0×0.5 cm 3. The Si detector is double sided with 64 strips per side in two orthogonal directions. The CZT detector has 64 pixels of pitch 0.25 cm. We used several ASICs (32 channel) to read out both detectors. A 137Cs source was used in the study. The energy deposited in the Si and CZT detectors and the points of interaction of the γ-ray in both detectors were read out. We varied the position of the source as well as the vertical separation between the Si and CZT detectors and measured the angular resolution of the source image for the different configurations. The best angular resolution (1σ) was 2.4°. Monte Carlo simulations were run for similar detector configurations and agree with the experimental results.

AB - A Compton imaging telescope has been constructed using a 0.2 cm thick Silicon (Si) detector of active area 9.0×9.0 cm 2 and a pixelated Cadmium Zinc Telluride (CZT) detector of dimensions 2.0×2.0×0.5 cm 3. The Si detector is double sided with 64 strips per side in two orthogonal directions. The CZT detector has 64 pixels of pitch 0.25 cm. We used several ASICs (32 channel) to read out both detectors. A 137Cs source was used in the study. The energy deposited in the Si and CZT detectors and the points of interaction of the γ-ray in both detectors were read out. We varied the position of the source as well as the vertical separation between the Si and CZT detectors and measured the angular resolution of the source image for the different configurations. The best angular resolution (1σ) was 2.4°. Monte Carlo simulations were run for similar detector configurations and agree with the experimental results.

KW - γ-ray

KW - Compton telescope

KW - Monte Carlo simulations

KW - Si and CZT detector

UR - https://www.scopus.com/pages/publications/84860993428

U2 - 10.1016/j.nima.2012.04.011

DO - 10.1016/j.nima.2012.04.011

M3 - Article

AN - SCOPUS:84860993428

SN - 0168-9002

VL - 682

SP - 79

EP - 84

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

ER -

Compton imaging with thick Si and CZT detectors

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