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| Number | Title | Issue Date |
| 7368707 | Radiation detector including means for indicating satisfactory operation A radiation detector, comprising a sensitive volume filled with a counter gas; an anode and a cathode each in communication with the counter gas; a voltage supply for maintaining a potential difference between the anode and the cathode, said potential difference bei... | 05/06/2008 |
| 7310404 | Radiation CT radiographing device, radiation CT radiographing system, and radiation CT radiographing method using the same An object rotating type cone beam radiation CT radiographing device in which a high speed and high sensitivity are obtained with low costs is provided. Thus, a radiation CT device of high performance for vehicle-mounted use and group medical examination can be provi... | 12/18/2007 |
| 7268347 | Ion detecting apparatus and methods Ion injection in a drift tube apparatus for mobility spectrometry was accomplished without conventional ion shutters such as the Bradbury-Nielson or similar designs common to such drift tubes. Instead ions were passed between the ion source and drift region by using... | 09/11/2007 |
| 7116751 | System and method for resolving threats in automated explosives detection in baggage and other parcels The CT threat resolution system includes an primary EDS scanning process to identify threats and the nature of threats and a plurality of secondary CT scanning processes to resolve threats. The primary EDS scanning process and secondary CT scanning processes can be ... | 10/03/2006 |
| 6906318 | Ion detector An ion detector 7 for a mass spectrometer is disclosed comprising a microchannel plate 8 which receives ions 12 at an input surface and releases secondary electrons 16 from an output surface. A detecting device 9 having a detecting... | 06/14/2005 |
| 6747278 | Radiation detector utilizing an unregulated power supply A radiation detector that utilizes an unregulated power supply as opposed to a regulated power supply, since quantitative results are not required, only an audible signal, and an unregulated power supply is less expensive than that of a regulated power supply. The r... | 06/08/2004 |
| 6664545 | Gate for modulating beam of charged particles and method for making same Bradbury-Nielson gates for the modulation of beams of charged particles, particularly ion beams in mass spectrometry, have been produced with an adjustable wire spacing down to 0.075 mm or a smaller spacing. The gates are robust, they can be fabricated in... | 12/16/2003 |
| 6606899 | Total impurity monitor for gases A device for measuring a total concentration of impurities in a sample gas is provided which includes a housing having an inlet to allow the sample gas to enter the housing, an emitter to generate ions from the sample gas, a field gradient to accelerate t... | 08/19/2003 |
| 6455859 | Selective flow path alpha particle detector and method of use A method and apparatus for monitoring alpha contamination are provided in which ions generated in the air surrounding the item, by the passage of alpha particles, are moved to a distant detector location. The parts of the item from which ions are withdraw... | 09/24/2002 |
| 6396063 | Radiofrequency gaseous detection device (RF-GDD) An alternating electromagnetic field in the radiofrequency range is applied in a gaseous environment (4). Free electrons produced in the gas (4), by an ionising source of radiation (5) or by interaction of a charged particle beam with a specimen, are acte... | 05/28/2002 |
| 6331707 | Electrostatic monitoring The apparatus and method provide a technique for more simply measuring alpha and/or beta emissions arising from items or locations. The technique uses indirect monitoring of the emissions by detecting ions generated by the emissions, the ions being attrac... | 12/18/2001 |
| 5644128 | Fast timing position sensitive detector A position sensitive fast timing detector for determining time-of-flight mass analysis and position of atomic particles includes a channel plate assembly for detecting the impact of one or more atomic particles a transforming them into one or more electro... | 07/01/1997 |
| 5543331 | Method of detection of alien matter contents in gases The objective of the invention is a method for detection of alien matter contents in gas, in which method the gas and the substances contained in it are ionized in an ionization room (1). By the present methods impurities in gases cannot be determined fas... | 08/06/1996 |
| 5416620 | Pockels cell with AC driving voltage at frequency of periodic variation of writing light source Disclosed is a picture information memory device, including a picture information memory means for generating electric charges corresponding to the intensity of write-in light incident thereon, and for holding the generated electric charges as polarized c... | 05/16/1995 |
| 5051592 | Photoconductive detectors of ionizing radiation, and methods of implementation The invention relates to detectors of ionizing radiation which use a photoconductor as the detecting element. The invention lies in an electrode moving in a direction OX through a photoconductive medium disposed between two grids of electrodes extending p... | 09/24/1991 |
| 5003176 | Ionization chamber An ionization chamber can stably measure a weak ionizing radiation with high sensitivity. The ionization chamber comprises an electrically conductive charge collecting electrode having a magnetic substance or a permanent magnet; an electromagnet for posit... | 03/26/1991 |
| 4931653 | Ionizing radiation detector system An optical ionizing radiation detector system (10) for determining the three-dimensional spatial distribution of all of the secondary electrons produced by the passage of ionizing radiation through a selected gas is provided. The detector system (10) can ... | 06/05/1990 |
| 4859854 | Open grid pulsed ion chamber operating in the linear ion collection region A detector for airborne alpha radiation includes a ion pulse collecting chamber connected to a phase shifted, 100% negative feedback electrometer circuit. The ion pulse chamber includes a probe surrounded by an 80% open grid, with the spacing between the ... | 08/22/1989 |
| 4857739 | Packet personal radiation monitor A personal radiation monitor of the chirper type is provided for detecting ionizing radiation. A battery powered high voltage power supply is used to generate and apply a high voltage bias to a G-M tube radiation sensor. The high voltage is monitored by a... | 08/15/1989 |
| 4417217 | Discharging element energizing circuit for discharge-type fire alarm sensor unit A discharging element energizing circuit for a discharge-type fire alarm sensor unit including a discharging element, wherein a power supply circuit gives a power voltage to the discharging element in the form of periodical output pulses making same ready... | 11/22/1983 |
| 4348589 | Microphonic noise compensation for an ionization detector A device for measuring local X-ray absorption differences in a patient or other object has an array of ionization detector elements. Each detector element has a high voltage electrode. The high voltage source for each such electrode has associated with it... | 09/07/1982 |
