Ambient temperature cadmium zinc telluride radiation detector and amplifier circuit

Patent · Fri May 29 00:00:00 EDT 1998

OSTI ID:871579

McQuaid, James H ^[1]; Lavietes, Anthony D ^[2]

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1. Livermore, CA
2. Hayward, CA

A low noise, low power consumption, compact, ambient temperature signal amplifier for a Cadmium Zinc Telluride (CZT) radiation detector. The amplifier can be used within a larger system (e.g., including a multi-channel analyzer) to allow isotopic analysis of radionuclides in the field. In one embodiment, the circuit stages of the low power, low noise amplifier are constructed using integrated circuit (IC) amplifiers , rather than discrete components, and include a very low noise, high gain, high bandwidth dual part preamplification stage, an amplification stage, and an filter stage. The low noise, low power consumption, compact, ambient temperature amplifier enables the CZT detector to achieve both the efficiency required to determine the presence of radio nuclides and the resolution necessary to perform isotopic analysis to perform nuclear material identification. The present low noise, low power, compact, ambient temperature amplifier enables a CZT detector to achieve resolution of less than 3% full width at half maximum at 122 keV for a Cobalt-57 isotope source. By using IC circuits and using only a single 12 volt supply and ground, the novel amplifier provides significant power savings and is well suited for prolonged portable in-field use and does not require heavy, bulky power supply components.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 5757227
• Application Number: 08/689447
• OSTI ID: 871579
• Country of Publication: United States
• Language: English

Related Subjects

ambient
temperature
cadmium
zinc
telluride
radiation
detector
amplifier
circuit
noise
power
consumption
compact
signal
czt
larger
including
multi-channel
analyzer
allow
isotopic
analysis
radionuclides
field
embodiment
stages
constructed
integrated
amplifiers
discrete
components
bandwidth
dual
preamplification
stage
amplification
filter
enables
achieve
efficiency
required
determine
presence
radio
nuclides
resolution
perform
nuclear
material
identification
width
half
maximum
122
kev
cobalt-57
isotope
source
circuits
single
12
volt
supply
ground
novel
provides
significant
savings
suited
prolonged
portable
in-field
require
heavy
bulky
power consumption
power supply
ambient temperature
integrated circuit
radiation detector
cadmium zinc
nuclear material
amplifier circuit
signal amplifier
filter stage
zinc telluride
temperature signal
isotopic analysis
channel analyzer
noise amplifier
amplification stage
amplifier provides
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