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HPXe Gamma Detectors
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TSA History TSA Systems has been in the business of designing and manufacturing SNM (Special Nuclear Materials) pedestrian, vehicle, and hand held monitors since 1981. TSA Systems, Ltd. was formed in 1987 with the merger of TSA Systems, Inc., founded in 1975, and Geoscience Associates, Inc., founded in 1961. The company has a distinguished history of providing high quality products and service. In 1983 TSA pioneered a new generation of all digital portal monitors, in close conjunction with the Advanced Nuclear Technology Group at Los Alamos National Laboratory. The first of these were installed at the Rocky Flats Plant in 1983-84. Since then, their innovative approach to problem solving has lead to a second generation of pedestrian and vehicle monitoring systems. |
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TSA's PM-700A and PM-700AGN monitors are stand-alone, pedestrian portal
monitors with excellent sensitivity and reliability. The PM-700A's large
detectors and unique detection algorithm improve its performance to the
point that it can achieve ASTM Standard C 1169 Category III* sensitivity
for SNM. All of the essential components are contained in the pillars; radiation detectors, controllers, and occupancy detector. The systems operate from an internal battery. The battery is constantly charged from the site's ac line during normal operation. In the event of a power outage, the battery permits continued operation for at least 24 hours. Model PM-700AGN adds neutron detection capability to the basic PM-700A. Both models are equipped with RS-232 and Ethernet communications capability. |
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TSA's Personnel Portal Monitor, Model PM-702, is a
highly reliable system for the radiometric protection of special nuclear
material (SNM). It is designed to exceed the criteria for an ASTM
Standard C 1169 Category II* SNM monitor which will detect 10 grams of
HEU on a walk-through basis. TSA's vehicle portal monitor VM-250A consists of two, self-contained, weather resistant pillars placed on either side of the roadway to be protected. Each pillar contains two plastic scintillator detectors, an occupancy detector, and an SCA-775 amplifier/controller. The master pillar also has a battery, power supply/battery charger, and an SC-770 system controller. Model VM-250AGN adds neutron detection capability to the basic VM-250A. Both models are equipped with RS-232 and Ethernet communications capability. The VM-375A system (not shown) is essentially a VM-250A with a third pillar positioned horizontally between the two upright pillars. The third pillar can be mounted above or below the other pillars. The VM-375A provides improved sensitivity over the VM-250A. Please contact TSA to discuss configuration and requirements for VM-375A systems. |
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TSA's hand held PRM-470 hand held series is a popular choice for locating radioactive sources and measuring intensity in the field. It uses low power CMOS electronics to provide extended operation from the rechargeable batteries. The versatile, easy to operate PRM-470 series also features a self-test during power up, automatic background count and user determined alarm settings. Settings may be configured from the front panel, or from a personal computer using RS-232 communications. Count information and unit parameters are presented to the user on an alphanumeric 4 line, 16 character display. An optional six digit, seven segment display may also be requested. |
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TSA's new Violinist IV is a full featured, multi-channel analyzer featuring a large area this crystal "Fiddler" type detector that is optimized for the 59 KeV Am-241 line. The Violinist IV uses a PMT base form factor MCA and a PDA for the system brains. The PDA allows for expanded spectra storage - field notes - and accessories such as GPS inputs or wireless communications to a laptop. |
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TSA's BM-185C is designed to scan small items for
radioactive contamination. The BM-185C provides 4 ? geometry and
efficiency of greater than 35% for 60Co. Plastic scintillator detectors are mounted on all six sides of the counting chamber to provide uniform measurement throughout the chamber. The monitor's high sensitivity is achieved by using six, large surface area plastic detectors coupled with prevalent micro-processor controlled electronics and sophisticated algorithms. _____________ TSA's BM-285C bag monitor and the BM-286C barrel monitor are trouble free instruments designed to measure gamma contamination of containerized material. The BM-285C can accommodate containers of up to 500 lb., while the BM-286C is designed to hold 55 gallon drums weighing up to 1,000 lb. ______________ TSA's automated box monitor, model ABM-486 contains plastic scintillator detectors which scan for radioactive contamination. The optional He3 detectors provide neutron monitoring which detects shielded SNM. |
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TSA's model NGE-187 scans small containers in its chamber for radioactive contamination and provides neutron monitoring which detects shielded SNM. |
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TSA's vehicle roadway monitor system, model VRM-5, was
developed to meet a requirement to survey roadways for contamination
from beta particles. The system consists of a four wheel electric
utility vehicle, a towed detector array, a Trimble GPS receiver, and a
PC based controller. ______________________ TSA's vehicle roadway monitor, model VRM-6, was developed to meet a requirement to survey a large area for gamma contamination. The system consists of a Polaris Ranger 6x6 all terrain vehicle with rear mounted radiation detector array, a Trimble GPS receiver, and a PC based controller. _______________ The vehicle roadway monitor, TSA's model GPRS-100, integrates a Trimble 12 channel global positioning system (GPS) with TSA's model VRM-3 vehicle mounted radiation monitor and a single board PC. TSA recommends that the system be mounted on a 3/4 ton minimum capacity, 4 wheel drive vehicle. _______________ |
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The model WM-290 is a high capacity conveyor waste monitoring system which detects gamma contamination. Accepting items up to 28" x 30" in size, its chamber height automatically adjusts to optimize detector geometry for a wide variety of items. After set up, its computer controller allows for simple operation. |
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The WM-295 is a conveyor waste monitor designed to scan a variety of solid waste material for gamma contamination. The items to be scanned are placed on the conveyor belt which transports them through the detector chamber at a controlled speed. Contaminated items trigger a visual and audio alarm. |
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TSA's automated box monitor, model ABM-486 contains
plastic scintillator detectors which scan for radioactive contamination. The optional He3 detectors provide neutron monitoring which detects shielded SNM. |
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TSA's model CPM-402A is a continuous pipe scanner which detects gamma contamination. It is available with one, two, or three counting chambers. |
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The rack controller system, model RCS-130, uses a
passive backplane which will accommodate up to ten channel cards, model
RCS-110, and one discriminator card, model RCS-120. The RCS-130 is
designed to work in conjunction with an SIF-653 interface card. These
components can be used as part of a complete system, for research
purposes, or to upgrade an existing system. Channel card, model RCS-110: Each channel card provides high voltage, amplification, and two independent single-channel analyzers. The high voltage and gains are manually adjusted on the card. The two SCA's can be used to provide amplitude discrimination between alpha and beta signals. Discriminator card, model RCS-120: The discriminator card provides four independent discriminator voltages to the channel cards in the same rack. Each voltage is individually programmed by the computer. The discriminator levels can also be adjusted manually. Applications: The rack controller system, model RCS-130 can be used as part of a complete system, for research purposes, or to upgrade an existing system. TSA can also supply custom software for specific applications, including a comprehensive list of commands for customer use. The model SIF-653 card is the heart of a real-time data acquisition system. It provides twenty-one 16 bit digital counter channels (seven Intel 82C54 counters), and 24 digital I/O lines. A Z8 microcontroller handles all of the real time processing, and transmits the resulting data via the RS-232 port The SIF-653 card can be plugged into a full-length PCI slot, or mounted as a stand-alone module. The PCI slot is only used to provide +12Vdc. The RS-232 interface is always used to read and write data. |
