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| Number | Title | Issue Date |
| 8143584 | Radon monitor A radon monitor includes a housing defining a housing cavity and having an opening in an exterior wall that is in fluid communication with the housing cavity to allow air to diffuse into and out of the housing cavity. The monitor also includes input and output units... | 03/27/2012 |
| 7875854 | Design structure for alpha particle sensor in SOI technology and structure thereof The invention relates to a design structure, and more particularly, to a design structure for an alpha particle sensor in SOI technology and a circuit thereof. The structure is a silicon-on-insulator radiation detector which includes: a charge collection node; a pre... | 01/25/2011 |
| 7550730 | Method for detecting alpha particles in SOI technology The invention relates to a method of detecting alpha particles in SOI technology and a circuit thereof. The structure is a silicon-on-insulator radiation detector which includes: a charge collection node; a precharge transistor that has a source from the charge coll... | 06/23/2009 |
| 7411198 | Integrator circuitry for single channel radiation detector Input circuitry is provided for a high voltage operated radiation detector to receive pulses from the detector having a rise time in the range of from about one nanosecond to about ten nanoseconds. An integrator circuit, which utilizes current feedback, receives the... | 08/12/2008 |
| 7375336 | ZnS(Ag) scintillation detector A ZnS (Ag) scintillation detector comprises a ZnS (Ag) scintillators layer 22 which is excited by incident α-rays and emits a scintillator light, a photomultiplier tube 16 which converts the scintillator light into an electric pulse signal, and a coun... | 05/20/2008 |
| 7369057 | Power generator and power generator auxiliary monitoring A generator monitoring system and method includes a plurality of sensors (12) disposed within a generator enclosure (18) to sense health conditions of a generator (10) housed within the enclosure. The sensors are interconnected to provide a sing... | 05/06/2008 |
| 7335890 | Method and apparatus for detecting atomic particles An atomic particle detection assembly includes at least one atomic particle detector positioned within a first chamber having a first operating pressure. The assembly also includes at least one junction apparatus coupled to the at least one atomic particle detector.... | 02/26/2008 |
| 7259381 | Methodology for determining electron beam penetration depth The Grunn equation: Depth = 0.046 ( ... | 08/21/2007 |
| 7250613 | Device for detecting ionizing radiation using a layer of fluorescent material The invention relates to a device for capturing ionizing radiation, in which a substrate which is provided with a phosphor layer is accommodated in a housing. To simplify the device and to ensure a high light yield, the invention provides that a means for buffering ... | 07/31/2007 |
| 7247855 | Portable nuclear detector A portable nuclear material detector generally includes a scintillating fiber radiation sensor, a light detector, a conditioning circuit, a frequency shift keying (FSK) circuit, a fast Fourier transform (FFT) circuit, an electronic controller, an amplitude spectral ... | 07/24/2007 |
| 7220968 | Radiation detector having all-metal circuitry operation of which is based on electron spin A radiation detector is described which includes first circuitry having at least one operational parameter associated therewith which is operable to change in response to radiation exposure. Second circuitry is operable to detect a change in the at least one operati... | 05/22/2007 |
| 7211142 | CdTe single crystal and CdTe polycrystal, and method for preparation thereof A CdTe single crystal, wherein chlorine concentration in the crystal is between 0.1 and 5.0 ppmwt and resistivity at room temperature is not less than 1.0×109 Ω·cm is obtained by growing the crystal according to one of a vertical gradient freezing meth... | 05/01/2007 |
| 7194360 | Method of determining radioactive nuclides A method of simply and quickly determining α-ray releasing nuclides having long half-life without carrying out a chemical separation is provided. By inputting a data of pulses incident to an α-ray detector in a computer, obtaining time distribution of the i... | 03/20/2007 |
| 7161153 | Apparatus and method for detecting α-ray An α-ray measuring apparatus is provided for accurately analyzing the energy of a trace of α-rays emitted from a sample in a short time using semiconductor detectors which excel in energy resolution. The α-ray measuring apparatus comprises an α-ray detector incl... | 01/09/2007 |
| 7148485 | Low-energy charged particle detector A low energy charged particle detector having a diode with a first layer and a top layer physically coupled to the first layer. The intersection between the first layer and the top layer defines a junction. The top layer is composed of a two-dimensional material suc... | 12/12/2006 |
| 7057180 | Detector for alpha particle or cosmic ray A detector circuit and method for detecting a silicon well voltage or current to indicate an alpha particle or cosmic ray strike of the silicon well. One significant application for the detection circuit of the present invention is for the redundancy repair latches ... | 06/06/2006 |
| 6998618 | Integral condition monitor for detecting overheating in an electric generator The present invention provides a flange-mounted condition monitor (30) that can be mounted to an access flange (21) on an access opening (20) on the housing (13) of a generator (10). The condition monitor (30) forms an integ... | 02/14/2006 |
| 6992298 | Coated spherical silicon nanoparticle thin film UV detector with UV response and method of making A UV detector has a UV detection thin film of coated spherical silicon nanoparticles formed upon a substrate. The detector includes structures to bias the thin film. In preferred embodiments, a thin conductor that is at least semi-transparent to UV radiation is form... | 01/31/2006 |
| 6847040 | Sensor arrangement and method in digital X-ray imaging A sensor arrangement and method for digital X-ray imaging. The sensor arrangement in digital X-ray imaging includes at least one sensor element which absorbs X-radiation and contains a medium, which has a relatively thin semi-conductor material structure, that conve... | 01/25/2005 |
| 6828561 | Apparatus and method for detecting alpha particles A memory array operates as an alpha particle detector. A predetermined state is stored in each memory storage location. The operating voltage of the memory array is established at a voltage where the stored values are relatively stable and not subject to change exce... | 12/07/2004 |
| 6822235 | Environmental radioactivity monitor An environmental radioactivity monitor comprises a filter (12) through which air is caused to flow, and a detector (13) of radiation emitted from the particles trapped on the filter. The signals from the radiation detector are analyzed into a multiplic... | 11/23/2004 |
| 6774638 | Charged particle measuring device and measuring method thereof A highly sensitive charged particle measuring device capable of measuring low-level alpha rays comprises in a measurement chamber 7 provided with a sealable door 15, a test sample 2 and a semiconductor detector 1, a radiation measuring ci... | 08/10/2004 |
| 6753469 | Very high efficiency, miniaturized, long-lived alpha particle power source using diamond devices for extreme space environments A power source converts α-particle energy into electricity by coulomb collision in doped diamond films. Alpha particle decay from curium-244 creates electron-hole pairs by freeing electrons and holes inside the crystal lattice in N- and P-doped diamond films. Ohmic... | 06/22/2004 |
| 6707045 | Detector for ionising radiation A detector for ionising radiation comprises first (10) and second (12) diamond detector elements which are connected to a common contact (14). The two detector elements are of differing thickness and are optimised for the detection of different ... | 03/16/2004 |
| 6479825 | Low-energy particle sensor A low-energy particle sensor includes current collection areas which take the form of diodes partially covering the substrate. In detection areas defined alongside the collection areas the small thickness of the material enables low-energy particles (in p... | 11/12/2002 |
| 6262420 | Detection of alpha radiation in a beta radiation field An apparatus and method for detecting alpha particles in the presence of high activities of beta particles utilizing an alpha spectrometer. The apparatus of the present invention utilizes a magnetic field applied around the sample in an alpha spectrometer... | 07/17/2001 |
| 6011479 | Personal continuous air monitor A personal continuous air monitor capable of giving immediate warning of the presence of radioactivity has a filter/detector head to be worn in the breathing zone of a user, containing a filter mounted adjacent to radiation detectors, and a preamplifier. ... | 01/04/2000 |
| 5962856 | Active matrix X-ray imaging array A digital detector for radiography and fluoroscopy is disclosed. The detector includes a large area, flat panel that easily fits into a conventional X-ray room bucky tray. The detector utilizes a layer of photoconductor (i.e. a-Se in the preferred embodim... | 10/05/1999 |
| 5677538 | Photodetectors using III-V nitrides A photodetector using a III-V nitride and having predetermined electrical properties is disclosed. The photodetector includes a substrate with interdigitated electrodes formed on its surface. The substrate has a sapphire base layer, a buffer layer formed ... | 10/14/1997 |
| 5656817 | Radioactive ion detector Apparatus for detecting the presence, in aqueous media, of substances which emit alpha and/or beta radiation and determining the oxidation state of these radioactive substances, that is, whether they are in cationic or anionic form. In one embodiment, a s... | 08/12/1997 |
| 5552610 | Device and method for accurately measuring concentrations of airborne transuranic isotopes An alpha continuous air monitor (CAM) with two silicon alpha detectors and three sample collection filters is described. This alpha CAM design provides continuous sampling and also measures the cumulative transuranic (TRU), i.e., plutonium and americium, ... | 09/03/1996 |
| 5489780 | Radon gas measurement apparatus having alpha particle-detecting photovoltaic photodiode surrounded by porous pressed metal daughter filter electrically charged as PO-218 ion accelerator A radon detector employs an electrically charged pressed, porous metal filter that allows radon gas diffusion, while blocking ambient light, so that it readily traps both attached and unattached Po-214 and Po-218 ions, that may be present in gas passing t... | 02/06/1996 |
| 5457322 | Semiconductor radiation detection apparatus for discriminating radiation having differing energy levels The invention provides a high sensitivity semiconductor radiation detection apparatus having pn junctions formed in opposite surfaces of at least one semiconductor wafer. A common electrode for the pn junctions is formed in the substrate region of the sem... | 10/10/1995 |
| 5331164 | Particle sensor array A particle sensor array which in a preferred embodiment comprises a static random access memory having a plurality of ion-sensitive memory cells, each such cell comprising at least one pull-down field effect transistor having a sensitive drain surface are... | 07/19/1994 |
| 5319208 | Forced air flow radon detector having electrically conductive inlet and exhaust filter A radon gas detector comprises a housing having an air inlet port leading to an interior, a radiation detection (e.g. alpha particle measurement) chamber and an air exhaust port leading from the interior chamber to the exterior of the housing. The chamber... | 06/07/1994 |
| 5276332 | Apparatus for measuring the activity of a solution Apparatus for measuring the activity of a solution and used for determining the plutonium concentration of a solution sampled from an irradiated nuclear fuel reprocessing installation and which comprises a rotary drum (20), which samples a film of... | 01/04/1994 |
| 5212385 | Diamond particle detector A radiation detector element which is optimized for the detection of particles comprises a layer of diamond or diamond-like carbon with first and second electrical contacts applied to the surface of the layer. The layer is formed on a silicon subs... | 05/18/1993 |
| 5124936 | Method and apparatus for measuring airborne uranium and transuranium elements Radioactivity from airborne uranium and transuranium elements is measured by utilizing two independent alpha spectroscopy techniques to subtract background alpha radiation from a gross radiation measurement to provide a net alpha count associated with jus... | 06/23/1992 |
| 5049744 | Radioactive particle densitometer apparatus employing modulation circuitry An apparatus and method for measuring the density of a low density medium ch as air by measuring the absorption of radioactivity decay particles such as alpha particles in the air. The apparatus includes a source of alpha particles from which the alpha pa... | 09/17/1991 |
| 5029248 | Electrostatic capture type radon measuring apparatus Disclosed is an electrostatic capture type radon-measuring apparatus, which includes a supporting circular cylinder supported on a supporting table with an axis of the cylinder extending substantially vertically. A positive electrode has a curved surface ... | 07/02/1991 |
