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• 76 x 76 mm NaI(Tl) scintillator with PMT • Digital pulse processor with charge sensitive amplifier, shaping amplifier, and MCA • All power supplies (low voltage and high voltage) • Interface hardware and PC software • Ruggedized scintillator and PMT • Gain stabilized in software • Ethernet & USB interfaces for robust communications • USB powers entire system • Flexible architecture for tailoring interfaces • For OEMs and custom users
GAMMA-RAD5 with a laptop computer a complete g-ray measurement solution.
Advance Product Information
• Standard detector size: 76 x 76 mm (3 x 3”) NaI(Tl) • Custom detectors available, including: 76 x 152 mm (3 x 6”) NaI(Tl) 10 x 10 x 40 cm3 (4 x 4 x 16”) NaI(Tl) 2.5 x 2.5 cm (1 x 1”) LaCl3 76 x 76 mm (3 x 3”) BGO • Dynamic range: 10 to 3000 keV • Resolution: <7% FWHM @ 662 keV, <5% @ 1.33 MeV • Count rates: to 200,000 cps • Power: 750 mW typical • Homeland security: portal monitors, shipping containers, handheld monitors • First responders and emergency workers • Nuclear safeguards verification • Toxic dump site monitor • In situ processing • Environmental or industrial monitoring • Teaching and research
Natural background 133Ba industrial isotope Natural uranium oxide Lantern mantle (with thorium)
Counts 0 500 1000 1500 2000 2500 3000 Energy Counts (keV)
Measured g-ray spectra of naturally occurring radioactive materials (NORM), an industrial 133Ba isotope, compared to natural background with no sources present.
The GAMMA-RAD5 is a complete, integrated g-ray spectrometer. It includes a scintillator and PMT, a charge sensitive preamplifier, a digital pulse processor and MCA based on Amptek’s DP5G, all the hardware and software necessary to control and communicate to a PC, and all power supplies. It is a single, integrated, portable module. Several key innovations make this system ideal for field use. First, the scintillator and PMT are ruggedized to protect against mechanical shock and vibration. Second, the Ethernet interface permits operation over long distances: 100 m via Ethernet or, with Internet software, globally while the USB interface permits a single connection (power and data) to virtually any computer. Third, it has a flexible digital architecture so it can be easily tailored for specific applications. The GAMMA-RAD5 is ideally suited for a wide range of g-ray spectroscopy measurements, from lab applications to most harsh field homeland security applications.
Tel: +1 (781) 275-2242
14 DeAngelo Drive, Bedford, MA 01730-2204 U.S.A. Fax: +1 (781) 275-3470 e-mail: email@example.com www.amptek.com
The gain from the NaI(Tl) and PMT is well known zation to vary with temperature.) are determined by the scintillation crystal.1 µs in the slow channel and 0. 8 SCAs Average current 150 mA. stopping power. high efficiency Cockroft-Walton power supply provides PMT bias. At Tpeak=0. HV is software controlled. software selectable from 0. fast pulse shape discrimination. The 76 x 76 mm NaI(Tl) is considered standard. the 20 MHz is standard. 0.Detector GAMMA-RAD5 Specifications fast channel but draws about 50% more power. The detector performance (resolution. The fast channel. 100% Interaction Probability MCA Performance Number of channels Presets Commandable to 8k . Tpeak=2. which can be used to control data acquisition.8 to 102. for use with all of Amptek’s digital processors and MCAs. This package provides the capability to configure the GAMMA-RAD5 and acquire and save data. Pulse Processing Performance Gain Settings Four software selectable coarse gain settings are available: 3 MeV full scale to 750 keV full scale. the maximum input count rate is 2 x 105 cps. The flat top has 63 software selectable values for each peaking time.75 and 1. These can be tailored for specific uses. total counts.25k channels.5 x 105 cps with a throughput of >50% and good baseline stability and pile-up rejection.2 cm (dia) 3.6 kg 76 x 76 mm NaI(Tl) Efficiency Computed Interaction Probabilities 10% External Connections Compton Scatter Photoeletric Nuclear Pair Production Total Attenuation USB Ethernet RS232 Aux I/O 1%100 1. Amptek provides a software developer’s kit so that users can write their own interface software. but many different configurations are possible. typically set to 2. Gate. Provides both serial data and power for the entire GAMMA-RAD5. yielding the specifications listed above. A software gain stabilization algorithm is available. written in Visual Basic and Visual C++. DHCP or fixed IP. 31. where it may be downloaded. Entire GAMMA-RAD5 can be powered from USB. and Throughput Custom Configuration With the typical configuration. photofraction. 3.000 10. The 80 MHz setting is recommended for custom scintillation materials with faster decay times.or 0. including the GAMMA-RAD5. used for pile-up rejection and pulse shape discrimination.25 or 0. Contact Amptek for details.4 μs peaking time (1 μs shaping time constant). 10Base-T or UDP. For NaI(Tl).25.5 μs. 1k. has a pulse pair resolving time of 0.4 μs.05 µs in the. Standard 2. the maximum input count rate is 1.4 μs. 2k. counts in a single channel. Time. counts in an ROI. 4k.5 cm X 9. Standard serial interface 115 Kbaud. etc.0 to 6. Fine gain is adjustable between 0. Power +5 V Range High Voltage Pulse Shape Trapezoidal. Detector Module DP5G Digital Pulse Processor Physical (76 x 76 mm NaI(Tl)) Size Mass Interface Software DPPMCA is a standard data acquisition and control package. The DP5G is set at the factory for either a 20 MHz or 80 MHz clock. Dead Time. The 80 MHz setting allows for peaking times down to 0. It is described in detail on Amptek’s website. Gain Stabili.4V. A stabilized. GAMMA-RAD5 Architecture Scintillator PMT Charge Ampli er Analog Pre lter ADC Digital Pulse Processing (FPGA) Spectrum Memory (MCA) Microcontroller Auxiliary I/O High Voltage Bias Supply Low Voltage Power Supply +5V Interface Hardware PCG Interface Module USB Ethernet RS232 Computer . Maximum Count Rate.8 μs.0 full-speed (12 mbps). or other unique requirements The detector is a ruggedized scintillator and PMT. Also included are example routines.000 Incident Photon Energy (keV) DAC Output Single pin LEMO connector.5k. Minimum acquisition time is <10 ms.
and be monitored on the other side of the world. It can also run over an Ethernet link and the Internet. a single GammaRad5 module can provide neutron detection while measuring the gamma-ray spectrum. a sandwich of two scintillators mated to a single photomultiplier tube. This software can run on a laptop. Natural uranium oxide Counts Lantern mantle (with natural thorium) Natural background (in laboratory) 0 500 1000 1500 2000 2500 3000 Energy (keV) Pedestrian Portal Monitor The same software used for the environmental monitoring application can be used in a pedestrian or vehicle portal monitor using much shorter data acquisi76 x 76 mm NaI Response to a 137Cs Pedestrian Walk-By 600 tion intervals. The lithium is enriched in 6Li. both total (red line) and in the 662 keV peak (small graph 500 on right). a 10 x 10 x 40 cm3 (4 x 4 x 16”) NaI(Tl) “bar. it provides gain stabilization using the 40K background peak. A LiI(Eu) crystal is added to the standard NaI(Tl) scintillator. The key is the use of a “Phoswich” detector. Portal Monitor The photo above shows a high sensitivity detector. and it provides a simple ROI analysis capability to verify if suspect counts are present above preset thresholds.Sound alarm 200 before and during the pedestrian in1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Time (seconds) cident. so the DP5’s pulse shape discrimination is used to distinguish between them. . The two scintillators produce different pulse shapes.α) reaction.” The photo on the left shows four “bars” mounted on a loading dock door. This program automatically saves a spectrum at user defined intervals. The plot below shows 137Cs Spectrum Background 662 keV 550 the count rate. when a pedestrian walked 450 by the 76 X 76 mm detector at a dis400 tance of 10 feet with a 100 mCi 137Cs. providing for efficient detection of neutrons via the 6Li(n. A 350 standard Geiger counter was unable 300 to detect the source.Pedestrian walking by 250 a natural background of 0. connected to the GAMMARAD5 by a USB cable.Nuclear Safeguard or Environmental Monitor GAMMA-RAD5 Applications Natural UO3 Spectrum An example program is provided with the GAMMA-RAD5 to aid in long term monitoring where weak sources are present. The NaI(Tl) measures the gamma-ray spectrum. Total Counts Gamma-Rad5 The photo on the right shows four “bars” mounted in a hallway. but the GAMMA-RAD5 clearly detected it and identified the energy. since it registered . Simultaneous Neutron Detection with Gamma-Ray Spectrum With a custom detector. The plot on the right shows a background spectrum and measurements from natural UO3 and a lantern mantle containing natural thorium.02 mR/hr .
The custom software will require changes to support DPPSDK. Bedford. Tel: +1 (781) 275-2242 Fax: +1 (781) 275-3470 e-mail: sales@amptek. For customers who wrote their own low level drivers. new drivers will be required.com AMPTEK INC. while the GAMMA-RAD used Amptek’s DP4. Patent 6. please see our web site: www.662 MeV 238U 1. The GAMMA-RAD5 modules are mounted on the VeriSpreader™ bar of the crane that lifts shipping containers.0E+00 137Cs 0 500 1000 1500 2000 2500 3000 Energy (keV) Spectrum 60Co Spectrum 1.0E+05 1.0E+04 Multi-Element Spectrum 133Ba 0.0E+02 (from 232Th decay) 1.com For further technical specifications. There are several auxiliary connectors available for timing.768. MA 01730-2204 U. GAMMA-RAD5 Spectra 1. the change to DPPMCA is minor.0E+03 — Background — 137Cs — 133Ba — UO3 208Tl 2615 keV 40K 1. and several other performance enhancements. gating.GAMMA-RAD5 Applications (con’t) Shipping Container Monitor The photograph on the right shows an application that takes full advantage of the ruggedization of the GAMMA-RAD5.amptek. a new subroutine library is available.A.356 MeV 137Cs 0.S.S. • The DP5 family offers significant improvements in interfacing. • The GAMMA-RAD5 uses a new release of application software. the DP5G. Radiation detection is carried out during routine handling so there is no delay in processing.com www. For customers using ADMCA. • The 2nd generation DP5 family from Amptek offers higher performance than the DP4.33 MeV 0 200 400 600 800 1000 Energy (keV) 0 500 1000 1500 2000 2500 3000 Energy (keV) How is the GAMMA-RAD5 different from the GAMMA-RAD? The GAMMA-RAD5 uses an enhanced digital processor. The spectroscopy performance keeps the false positive rate at a very low level. For customers who wrote their own application software using the DLL.006 MeV Counts 1. Field-upgradable firmware. it has improved pile-up rejection and improved pulse shape discrimination.8% FWHM Counts Counts 662 keV 42 keV (6. which is a vital concern.17 MeV 4. USB.4%) 1. It fully supports Ethernet. * VeriSpreader™ is a trademark of VeriTainer Corporation U. It will support a List Mode in addition to histogram mode (with a future upgrade). 14 DeAngelo Drive.amptek.46 MeV 1. . DPPAPI. It operates at higher count rates. and RS232 interfaces and supports 64 bit operating systems such as Windows 7.421.0E+01 1. and other functions. DPPSDK.
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