| Detectors |
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Neutron Detectors - NP Series
Features:
• Designed to respond to thermal, epithermal and fast neutrons.
• Measurement of tissue equivalent dose rate of the neutron field.
• SMART probe retains probe information in non-volatile memory.
• 3He/BF3 proportional counter.
• 10B attenuator.
• Polyethylene moderator.
• Excellent linearity and accuracy.
• Detectors are easily interchanged.
• Optional mounting bracket. |
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Description:
The NP Series provides customers with the capability of detecting slow and fast neutrons and measurement of tissue equivalent dose rate of the neutron field. The detectors contain a proportional counter which produces pulses resulting from neutron interactions within it. The probes contain components which moderate and attenuate neutrons so that the net incident flux at the proportional counter is a thermal and low epithermal flux representative of the tissue equivalent dose rate and the neutron field.
The neutron probe also contains a Circuit Card Assembly (CCA), Amplifier and Logic, and a CCA High Voltage supply.
The NP Series of detectors are SMART probes, which retain probe information in non-volatile memory. When calibrated, data such as probe calibration constants and identifying information are stored and verified in the EEPROM memory in the probe circuitry.
The NP Series of detectors are "maintenance free" in design and require no routine servicing or preventive maintenance.
The NP Series can be connected to multifunction control and display units such as ADM606M. |
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Germanium Detectors
INTRODUCTION
Germanium detectors are semiconductor diodes having a p-i-n structure in which the intrinsic (I) region is sensitive to ionizing radiation, particularly x rays and gamma rays. Under reverse bias, an electric field extends across the intrinsic or depleted region. When photons interact with the material within the depleted volume of a detector, charge carriers (holes and electrons) are produced and are swept by the electric field to the P and N electrodes. This charge, which is in proportion to the energy deposited in the detector by the incoming photon, is converted into a voltage pulse by an integral charge sensitive preamplifier.
Because germanium has relatively low band gap, these detectors must be cooled in order to reduce the thermal generation of charge carriers (thus reverse leakage current) to an acceptable level. Otherwise, leakage current induced noise destroys the energy resolution of the germanium detector. Liquid nitrogen, which has a temperature of 77 °K is the common cooling medium for such detectors. The germanium detector is mounted in a vacuum chamber which is attached to or inserted into an LN2 Dewar. The sensitive detector surfaces are thus protected from moisture and condensible contaminants. |
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| Environmental and Radiation Monitoring Systems |
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Alpha and Alpha / Beta in Air Monitors
iCAM Alpha/Beta Air Monitori
CAM™ Filter Options
iCAM/MF Moving Filter Head for iCAM
ECAM - Alpha Beta Environmental Continuous Air Monitor
NetCam - Networked Continuous Air Monitor
Portable Gas Monitor PGM102
Alpha Sentry CAM System
CAM110FF Series Continuous Air Monitors |
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Gamma Area Monitors
• Gamma Monitor G64
• BARA 31 Gamma Alarm Beacon |
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| Health Physics / Environmental Monitoring |
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Electronic Dosimeters
People working in nuclear facilities and other radiation environments need to monitor their exposure to potentially harmful radiation.
AMP offers dosimetry solutions for small operations with few employees to large installations where thousands of people need to be monitored. All solutions are based on a unique dosimeter that can store all personal data. Each dosimeter is a personal radiation detection unit where an individual worker's ID is stored in the dosimeter's memory. Dosimeters can be used alone, with a single reader and database software, or with zone access readers linked to a network system.
It is expandable systems that cover the dosimetry needs of small to large facilities.
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Survey Instruments and Probes
Portable survey instruments and probes provide radiation workers with instant health physics information related to exposure from either contamination or external sources. For ALARA planning, it is critical to be able to avoid or monitor all high ambient radiation environments and to be able to identify contamination from any potential source.
AMP offers multiple radiation detection solutions depending on the type of environment that must be monitored. The survey instruments are hand-held battery powered radiation detection devices. Many of the probes that are used in the AMP survey instruments use smart probe technology. Smart probes are embedded with information that is specific to each probe. This information is automatically recognized by the survey meter making calibration parameters avaialble to the instrument and simplifying survey meter usage.
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| Military Products and Solutions |
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Radiation Detection System RDS-100
Features:
• Storage of up to 300 data points, including dose rate, date and time
• GPS compatible
• Compatible with "SMART" Probes
• Outstanding linearity over a wide dynamic range
• Can be calibrated using license-free source
• Compatible with Training Probes
• Can be operated and read while wearing fire or hazmat
protective clothing
• Will not ignite explosive atmospheres - intrinsically safe
• Waterproof to 3 ftBackground Subtract feature
• Electronic filter to reduce fluctuations in readings
• Built-in RS-232 interface
• Automatic self-calibration |
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| Multichannel Analyzers (MCAs) |
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Multichannel Analyzers - Installed
• AIM - Acquisition Interface Module Model 556B
• DSA-1000 Desktop Spectrum Analyzer
• Lynx® Digital Signal Analyzer
• Multiport II Multichannel Analyzer
• OSPREY™: Universal Digital MCA Tube Base
for Scintillation Spectrometry |
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Multichannel Analyzers - Portable
• Falcon 5000® Portable HPGe-Based Radionuclide Identifier
• InSpector™ 1000 Family
• InSpector 2000 DSP Portable Spectroscopy Workstation
• OSPREY™: Universal Digital MCA Tube Base
for Scintillation Spectrometry |
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| Nuclear Instrumentation Modules |
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Alpha Spectrometers and Accessories
AMP offers modular Alpha Spectrometry systems which span the needs of the researcher from single-input, manual counting configurations to multi-input, computer controlled spectrometer arrays. The Model 7401 Alpha Spectrometer, with a suitable PIPS® Detector, is a good choice for systems with two inputs or less, providing a complete spectrometer in a double-width NIM module. For systems with larger numbers of inputs, the Alpha Analyst offers a cost-effective, turnkey solution.
The Model 7401includes a vacuum chamber large enough to accommodate samples up to 5 cm in diameter, detector bias supply, test pulser, and a vacuum gauge with vacuum/bias interlock. It also includes a built-in preamp/amplifier, discriminator, and a counter/ timer to facilitate gross counting. A microprocessor manages the front panel controls, displaying parameters such as counts, elapsed time, detector leakage current, detector bias and chamber pressure. A stainless steel sample holder provides reproducible geometries. The Model 7401 can be interfaced directly to a Multichannel Analyzer’s ADC or multiplexed with other inputs through a Mixer/ Router.
When interfaced to a computer system, the 7401 is supported by the Genie™ 2000 Alpha Spectroscopy Analysis option and the Apex-Alpha™. For applications requiring reduced recoil contamination, reverse bias and the reduced vacuum are optionally available.
Accessories which are available for alpha spectroscopy systems include vacuum pumps, manifolds, filters, vacuum tubing and pressure regulators.
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Amplifiers
When configuring a component system, no single signal processing module is more important to choose correctly than the amplifier. Ultimately, it is the amplifier whose gain range, shaping time constants, low-noise design and other characteristics, must be well chosen for the particular type of detector being used, and the application being addressed.
This section lists numerous specialty and spectroscopy-grade amplifiers which may be used to satisfy a wide variety of applications. Many of their characteristics are discussed below.
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Power Supplies (NIM)
To insure the ultimate performance of your system, we offer a complete line of NIM Bins and Detector Power Supplies to satisfy practically every nuclear application. Like all products, NIM Bins and Detector Power Supplies are designed and manufactured in accordance with strict quality assurance standards to insure exceptional low-noise performance and years of dependable service. |
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Preamplifiers
The preamplifier associated with radiation detectors performs three essential functions:
• Conversion of charge to voltage pulse
• Signal amplification
• Pulse shaping
Most preamplifiers in use today are charge sensitive, and provide an output pulse with an amplitude proportional to the integrated charge output from the detector. General purpose preamplifiers have a RC feedback network which results in a quasi-step function output. For extremely low noise detectors (Si(Li) and Low Energy HPGe), the feedback resistor is eliminated and the output signal becomes a true step function, which builds up in random staircase fashion, and is reset by feedback circuitry. For many high count rate and high resolution applications with HPGe detectors, the Transistor Reset Preamplifier (TRP) offers the best performance.
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| Spectroscopy and Data Management Software |
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Genie™ 2000 Applications
Software
This latest Genie™ 2000 & ISOCS™/LabSOCS™ version offers a wide range
of enhancements including:
• Powerful 3D-Geometry composer
• Beaker Editor for fast creation of laboratory measurement geometries
• Cascade Summing Correction (CSC) improvements, including x-rays and gammas down to 10keV with no need to use any radioactive sources
• New low-energy detector characterization process with reduced turn-around times
• Enhanced LibCorNID background compensation algorithm for vastly improved LaBr3(Ce) spectrometry
• ISOCS™ / LabSOCS™ Uncertainty Estimator (IUE) to quickly optimize the measurement geometry and compute the efficiency uncertainty
• ISO 11929 compliant
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