A Germanium orthogonal strip detector system for gamma-ray imaging

Ethan L. Hull; Morgan T. Burks; Chris P. Cork; William Craig; Del Eckels; Lorenzo Fabris; Anthony Lavietes; Paul N. Luke; Norman W. Madden; Richard H. Pehl; Klaus P. Ziock

doi:10.1117/12.450750

A Germanium orthogonal strip detector system for gamma-ray imaging

Ethan L. Hull, Morgan T. Burks, Chris P. Cork, William Craig, Del Eckels, Lorenzo Fabris, Anthony Lavietes, Paul N. Luke, Norman W. Madden, Richard H. Pehl, Klaus P. Ziock

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

5 Scopus citations

Abstract

A germanium-detector based, gamma-ray imaging system has been designed, fabricated, and tested. The detector, cryostat, electronics, readout, and imaging software are discussed. An 11 millimeter thick, 2 millimeter pitch 19×19 orthogonal strip planar germanium detector is used in front of a coaxial detector to provide broad energy coverage. The planar detector was fabricated using amorphous germanium contacts. Each channel is read out with a compact, low noise external FET preamplifier specially designed for this detector. A bank of shaping amplifiers, fast amplifiers, and fast leading edge discriminators were designed and fabricated to process the signals from the preamplifiers. The readout system coordinates time coincident x-y strip addresses with an x-strip spectroscopy signal and a spectroscopy signal from the coaxial detector. This information is sent to a computer where an image is formed. Preliminary shadow and pinhole images demonstrate the viability of a germanium based imaging system. The excellent energy resolution of the germanium detector system provides isotopic imaging.

Original language	English
Pages (from-to)	132-140
Number of pages	9
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4507
DOIs	https://doi.org/10.1117/12.450750
State	Published - 2001
Externally published	Yes

Keywords

Gamma-ray imaging
Germanium detector
URA

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10.1117/12.450750

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title = "A Germanium orthogonal strip detector system for gamma-ray imaging",

abstract = "A germanium-detector based, gamma-ray imaging system has been designed, fabricated, and tested. The detector, cryostat, electronics, readout, and imaging software are discussed. An 11 millimeter thick, 2 millimeter pitch 19×19 orthogonal strip planar germanium detector is used in front of a coaxial detector to provide broad energy coverage. The planar detector was fabricated using amorphous germanium contacts. Each channel is read out with a compact, low noise external FET preamplifier specially designed for this detector. A bank of shaping amplifiers, fast amplifiers, and fast leading edge discriminators were designed and fabricated to process the signals from the preamplifiers. The readout system coordinates time coincident x-y strip addresses with an x-strip spectroscopy signal and a spectroscopy signal from the coaxial detector. This information is sent to a computer where an image is formed. Preliminary shadow and pinhole images demonstrate the viability of a germanium based imaging system. The excellent energy resolution of the germanium detector system provides isotopic imaging.",

keywords = "Gamma-ray imaging, Germanium detector, URA",

author = "Hull, {Ethan L.} and Burks, {Morgan T.} and Cork, {Chris P.} and William Craig and Del Eckels and Lorenzo Fabris and Anthony Lavietes and Luke, {Paul N.} and Madden, {Norman W.} and Pehl, {Richard H.} and Ziock, {Klaus P.}",

year = "2001",

doi = "10.1117/12.450750",

language = "English",

volume = "4507",

pages = "132--140",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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T1 - A Germanium orthogonal strip detector system for gamma-ray imaging

AU - Hull, Ethan L.

AU - Burks, Morgan T.

AU - Cork, Chris P.

AU - Craig, William

AU - Eckels, Del

AU - Fabris, Lorenzo

AU - Lavietes, Anthony

AU - Luke, Paul N.

AU - Madden, Norman W.

AU - Pehl, Richard H.

AU - Ziock, Klaus P.

PY - 2001

Y1 - 2001

N2 - A germanium-detector based, gamma-ray imaging system has been designed, fabricated, and tested. The detector, cryostat, electronics, readout, and imaging software are discussed. An 11 millimeter thick, 2 millimeter pitch 19×19 orthogonal strip planar germanium detector is used in front of a coaxial detector to provide broad energy coverage. The planar detector was fabricated using amorphous germanium contacts. Each channel is read out with a compact, low noise external FET preamplifier specially designed for this detector. A bank of shaping amplifiers, fast amplifiers, and fast leading edge discriminators were designed and fabricated to process the signals from the preamplifiers. The readout system coordinates time coincident x-y strip addresses with an x-strip spectroscopy signal and a spectroscopy signal from the coaxial detector. This information is sent to a computer where an image is formed. Preliminary shadow and pinhole images demonstrate the viability of a germanium based imaging system. The excellent energy resolution of the germanium detector system provides isotopic imaging.

AB - A germanium-detector based, gamma-ray imaging system has been designed, fabricated, and tested. The detector, cryostat, electronics, readout, and imaging software are discussed. An 11 millimeter thick, 2 millimeter pitch 19×19 orthogonal strip planar germanium detector is used in front of a coaxial detector to provide broad energy coverage. The planar detector was fabricated using amorphous germanium contacts. Each channel is read out with a compact, low noise external FET preamplifier specially designed for this detector. A bank of shaping amplifiers, fast amplifiers, and fast leading edge discriminators were designed and fabricated to process the signals from the preamplifiers. The readout system coordinates time coincident x-y strip addresses with an x-strip spectroscopy signal and a spectroscopy signal from the coaxial detector. This information is sent to a computer where an image is formed. Preliminary shadow and pinhole images demonstrate the viability of a germanium based imaging system. The excellent energy resolution of the germanium detector system provides isotopic imaging.

KW - Gamma-ray imaging

KW - Germanium detector

KW - URA

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DO - 10.1117/12.450750

M3 - Article

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SN - 0277-786X

VL - 4507

SP - 132

EP - 140

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

ER -

A Germanium orthogonal strip detector system for gamma-ray imaging

Abstract

Keywords

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