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| Number | Title | Issue Date |
| 8115179 | Radiation detection system A preamplifier circuit for processing a signal provided by a radiation detector includes a transimpedance amplifier coupled to receive a current signal from a detector and generate a voltage signal at its output. A second amplification stage has an input coupled to ... | 02/14/2012 |
| 7342231 | Detection of coincident radiations in a single transducer by pulse shape analysis Pulse shape analysis determines if two radiations are in coincidence. A transducer is provided that, when it absorbs the first radiation produces an output pulse that is characterized by a shorter time constant and whose area is nominally proportional to the energy ... | 03/11/2008 |
| 7268353 | Measuring the moisture content of plutonium oxide canisters A process for measuring the moisture content in a quantity of PuO2 powder. The process detects the content of thermal neutrons emitted by the quantity of PuO2 powder and then deduces its moisture content from a value of the detected content ass... | 09/11/2007 |
| 7235784 | Transmission electron microscope and image observation method using it Drift generated at the time of photographing a TEM image is corrected simultaneously with photographing, so that a TEM image free form influence of drift is photographed. While the TEM image is recorded, drift in the place out of the view field subjected to recordin... | 06/26/2007 |
| 7081626 | Apparatus and method for temperature correction and expanded count rate of inorganic scintillation detectors The present invention includes an apparatus and corresponding method for temperature correction and count rate expansion of inorganic scintillation detectors. A temperature sensor is attached to an inorganic scintillation detector. The inorganic scintillation detect... | 07/25/2006 |
| 7026627 | Neutron/gamma ray survey instrument with directional gamma ray sensitivity A portable survey instrument and methodology yield intensity of neutron radiation, intensity of gamma radiation, and a direction of impinging gamma radiation. The instrument uses a neutron detector surrounded by an essentially rectangular moderator with preferably f... | 04/11/2006 |
| 6954512 | Neutron spectrometer with aluminum proton absorber A neutron spectrometer is provided by a series of substrates covered by a solid-state detector stacked on an absorbing layer. As many as 12 substrates that convert neutrons to protons are covered by a layer of absorbing material, acting as a proton absorber, with th... | 10/11/2005 |
| 6928130 | Dodecahedron neutron spectrometer with tantalum proton absorber for aircraft A neutron spectrometer for aircraft is provided by a series of substrates covered by a solid-state detector stacked on an absorbing layer. As many as 12 substrates that convert neutrons to protons are covered by a layer of absorbing material, acting as a proton abso... | 08/09/2005 |
| 6838671 | Device and method for the detection of buried objects A device and method for detection of buried objects (40) utilizing a down looking infrared array (140) having infrared detectors (170) positioned in a sensor array (30). This sensor array (30) may also contain ground penetrating ra... | 01/04/2005 |
| 6577697 | Field analysis of geological samples using delayed neutron activation analysis A system and method for rapidly analyzing elemental abundances in rock or soil samples (14) under field conditions. The system uses a portable neutron source (12) to allow neutron activation analysis of elements having identifiable radioactive decay chara... | 06/10/2003 |
| 6529573 | Proton recoil scintillator neutron rem meter A neutron rem meter utilizing proton recoil and thermal neutron scintillators to provide neutron detection and dose measurement. In using both fast scintillators and a thermal neutron scintillator the meter provides a wide range of sensitivity, uniform di... | 03/04/2003 |
| 6456681 | Neutron flux measuring apparatus A neutron flux measuring apparatus, adapted to a boiling-water reactor (BWR) of a nuclear power plant and an advanced boiling-water reactor (ABWR) of a nuclear power plant, for measuring a neutron flux in a reactor pressure vessel, comprises a neutron flu... | 09/24/2002 |
| 6333631 | Cantilevered manipulator for autonomous non-contact scanning of natural surfaces for the deployment of landmine detectors Apparatus and method is provided for performing detailed mine detection over variable terrain. An articulated robotic scanner comprises an articulated arm mounted to any vehicle such as a robot. One or more mine detectors mounted at the end of the arm. Th... | 12/25/2001 |
| 6026135 | Multisensor vehicle-mounted mine detector A multisensor vehicle-mounted mine detector having one or more sensors leading the vehicle for detecting objects in the ground while moving. A navigational system tracks the coordinates of the detected objects, performs data fusion, declares whether the o... | 02/15/2000 |
| 5818054 | Substance detection device using monoenergetic neutrons A method and apparatus for non-invasively determining the internal composition of objects are disclosed. The object of interest is probed with low energy, monoenergetic narrow beams of fast neutrons. The object is generally placed on a conveyor belt which... | 10/06/1998 |
| 5578830 | Neutron dose equivalent meter A neutron dose equivalent detector for measuring neutron dose capable of accurately responding to neutron energies according to published fluence to dose curves. The neutron dose equivalent meter has an inner sphere of polyethylene, with a middle shell ov... | 11/26/1996 |
| 5567936 | Light emitting diode reference locket A reference locket for use in calibrating a radiac computer indicator or trument having a light emitting diode or LED. The present invention is an inexpensive stable device having a base, a retainer placed in the base holding a light emitting diode or LE... | 10/22/1996 |
| 5557108 | Integrated substance detection and identification system An apparatus and method for non-destructively detecting and identifying narcotics, explosives, and other forms of contraband concealed within a container or otherwise hidden from view. A radioactive source is used in conjunction with both neutron and gamm... | 09/17/1996 |
| 5446288 | Integrated substance detection instrument A portable device used for non-destructive detection of illicit narcotics, or other hydrogen or light element containing substances, includes a weak, self-contained, radioactive source of fast neutrons and a detector for detecting scattered thermal neutro... | 08/29/1995 |
| 5278417 | High energy neutron dosimeter A device for measuring dose equivalents in neutron radiation fields. The device includes nested symmetrical hemispheres (forming spheres) of different neutron moderating materials that allow the measurement of dose equivalents from 0.025 eV to past 1 GeV.... | 01/11/1994 |
| 5229066 | Control rod position indication system The present invention is a system which determines nuclear reactor control rod axial position using a deviation signature database generated from a current or reference signal pattern produced by one or more strings of axially dispersed fixed incore detec... | 07/20/1993 |
| 5192490 | Extended range neutron detection device for monitoring and control of nuclear reactors A neutron detection device is housed in a metal enclosure containing a first detector with a high-sensitivity fission chamber, and a second detector having a low-sensitivity fission chamber and a boron-lined ionization chamber compensated for gamma radiat... | 03/09/1993 |
| 5180917 | Self-calibrating proportional counter The invention relates to a method and an apparatus for qualifying the operation of a radiation (e.g. neutron) detector containing an ionizable gas (e.g. He3), such as a detector disposed in a logging sonde designed to be lowered in a well, wher... | 01/19/1993 |
| 5155356 | Apparatus and method for detecting subterranean leakage from a large storage vessel An apparatus and method for detecting changes in a physical property of the material beneath a large storage vessel, such as a landfill. The apparatus includes one or more tubes defining elongate channels in the material beneath the storage vessel. A sens... | 10/13/1992 |
| 5078951 | High efficiency fast neutron threshold deflector A high-efficiency apparatus for detecting fast neutrons includes an assembly of disks of solid state charged particle detector material, or other appropriate charged particle detecting devices, disposed between adjacent thick (on the order of 1 mm) disks ... | 01/07/1992 |
| 5057268 | Method and composition of matter for detecting large quantities of paper currency Paper notes used as a monetary currency are deuterated. The level of deuteration while not complete, is high. For U.S. currency the level of deuteration is at least 0.1 mg of deuterium for each one dollar in value of the currency note, and preferably at l... | 10/15/1991 |
| 4962306 | Magnetically filtered low loss scanning electron microscopy An electron microscope which includes a detector which is located in the magnetic field used to focus the primary electron beam onto the sample. The focusing magnetic field is used to energy-filter and/or energy analyze the scattered electrons without the... | 10/09/1990 |
| 4920548 | Source range neutron flux count rate system incorporating method and apparatus for eliminating noise from pulse signal In a method and apparatus for reducing the effects of frequency burst noise and noise spikes accompanying a random pulse signal, pulses with an amplitude above a high threshold or below a low threshold are eliminated, with the remaining pulses of intermed... | 04/24/1990 |
| 4853174 | Low level detector monitor A method and apparatus for monitoring the neutron flux in the core of a nuclear reactor by means of a neutron detector which is composed of two electrodes between which a d.c. bias voltage is applied and which has a greater neutron sensitivity when the d.... | 08/01/1989 |
| 4814623 | Pulsed neutron detector A pulsed neutron detector and system for detecting low intensity fast neutron pulses has a body of beryllium adjacent a body of hydrogenous material the latter of which acts as a beta particle detector, scintillator, and moderator. The fast neutrons (defi... | 03/21/1989 |
| 4757202 | Solid state dosimeter This invention provides a direct reading solid-state dosimeter which will measure neutron and gamma radiation. A dual metal-oxide-semiconductor field-effect transistor (MOSFET) is used as a gamma sensor and a forward biased PIN diode as a neutron sensor. ... | 07/12/1988 |
| 4699751 | Neutron dosimeter A dosimeter which incorporates new methods for determining neutron dose. Less than one millirad of dose due to neutrons of all energies down to approximately 103 eV can be measured, and the response can be adjusted by design of the dosimeter. T... | 10/13/1987 |
| 4667107 | Ultrafast neutron detector The invention comprises a neutron detector (50) of very high temporal resolution that is particularly well suited for measuring the fusion reaction neutrons produced by laser-driven inertial confinement fusion targets. The detector comprises a biased two-... | 05/19/1987 |
| 4646068 | Ice monitoring system using neutron moderation A layer of hydrogenous material, such as ice which may accumulate on an outer airplane surface, is monitored according to neutron moderation by the layer. A source of fast neutrons and a detector of slow neutrons are mounted on one side of a mounting plat... | 02/24/1987 |
| 4642466 | Fast counting electronics for neutron coincidence counting An amplifier-discriminator is tailored to output a very short pulse upon an above-threshold input from a detector which may be a 3 He detector. The short pulse output is stretched and energizes a light emitting diode (LED) to provide a visual o... | 02/10/1987 |
| 4634568 | Fixed incore wide range neutron sensor Disclosed is a neutron detector, provided with a sealed chamber having two spaced apart electrodes, hermetically sealed in the chamber with a seal which is located in an environment of at least two decades less neutron flux than that experienced by the de... | 01/06/1987 |
| 4617167 | Underwater radiation detector A detector apparatus for differentiating between gamma and neutron radiation is provided. The detector includes a pair of differentially shielded Geiger-Mueller tubes. The first tube is wrapped in silver foil and the second tube is wrapped in lead foil. B... | 10/14/1986 |
| 4581813 | Method for producing encapsulated thermocouples A method for fabricating a thermocouple unit for service in and about nuclear reactors and other radioactive environments. The method provides a thermocouple encapsulated within a sphere of fissile material.... | 04/15/1986 |
| 4580057 | Neutron detector amplifier circuit A neutron detector system is disclosed wherein a neutron charge amplifier discriminator circuit is used in conjunction with a neutron detector enabling detection of nuclear events, amplification of extremely small signals, conditioning of the signals, fur... | 04/01/1986 |
| 4580056 | Neutron event counting circuit An electronic circuit provides various accurate counts of detected neutrons to enable the assaying of fissile material in a neutron emitting radioactive source. The circuit develops a time correlated window associated with each detected neutron, and delay... | 04/01/1986 |
