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8970099 Ionization chamber with built-in temperature sensor  
The present disclosure relates to an ionization chamber with a built-in temperature sensor, which is especially adapted for devices, such as X-ray units, gamma irradiators and linear accelerators,...
7279685 Radiation detector  
The invention is a digital radiation detector utilizing the stable timing functions of a microcontroller or plurality of microcontrolling devices to perform three independent functions. A first...
6271516 G.M. tube environment radioactivity meter having a sensitivity degradation monitoring device with a natural radioisotope and means for automatically correcting the measured radioactivity  
A G.M. tube environment radiameter including a sensitivity degradation monitoring device, comprising: a cyclic counter circuit for counting the pulses coming from the G.M. tube; b) a power...
5602441 Vacuum ionization gauging tube  
A vacuum ionization gauging tube, particularly a Bayard-Alpert (B-A) type vacuum ionization gauging tube, has a firmly compact construction, and provides the capabilities for minimizing outgassing...
5416376 Aerogel-supported filament  
The present invention is a thin filament embedded in a low density aerogel for use in radiation detection instruments and incandescent lamps. The aerogel provides a supportive matrix that is...
5326977 Gamma-ray compensated ionization chamber  
A gamma-ray compensated ionization chamber wherein the state of compensating a gamma-ray is controlled by utilizing the effect that a change in the applied voltage ratio of a high-voltage...
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...
4870281 Gas-filled X-ray detector  
The anode connections in a gas-filled X-ray detector are mounted so as to extend transversely of the anode wire so that a substantial saving as regards space is achieved. In order to reduce field...
4857740 Wire chamber  
A wire chamber or proportional counter device, such as Geiger-Mueller tube or drift chamber, improved with a gas mixture providing a stable drift velocity while eliminating wire aging caused by...
4827135 High speed curved position sensitive detector  
A high speed curved position sensitive porportional counter detector for use in x-ray diffraction, the detection of 5-20 keV photons and the like. The detector employs a planar anode assembly of a...
4684806 Rhenium lined Geiger-Mueller tube  
A Geiger-Mueller tube includes a tubular, stainless steel cathode (A) which defines a chamber (B) therein. An anode (C) extends axially through the chamber in a spaced relationship with the...
4678918 Integrated radiation detector  
An integrated radiation detector comprises a number of electrode plates assembled at a mutual distance. The electrode plates comprise slots in which electrically insulating gas-tight strips...
4654556 Apparatus for examining samples by electron emission  
The invention relates to the examination of samples which, by thermal or photon excitation, are able to emit electrons. These electrons are detected and located by a counter incorporating a...
4633089 Hand held radiation detector  
A hand-held radiation detector for measuring localized radiation at extremely low levels of the order of 1 CPM (counts per minute); an anode is provided in the form of a needle within a sealed...
4608511 Energy filter for a Geiger-Muller tube  
A gamma ray energy filter for a improving the uniformity of response of a Geiger-Muller tube comprises only two spaced filter bodies. To improve the uniformity of the energy response, the two...
4590401 Ion chamber with a flat sensitivity response characteristic  
An ion chamber exhibiting a flat response to a wide range of incident gamma energy is provided by a high-pressure fill gas mixture of a first major constituent, low atomic number gas which...
4583020 Ionization chamber making it possible to measure high energy gamma radiation  
Ionization chamber making it possible to measure high energy gamma radiation, wherein it comprises a tight cylindrical enclosure containing an ionizable gas, and several coaxial cylindrical...
4553062 Curved gas-filled detector with avalanche of electrons, and strip  
Gas-filled detector for locating the presence in space of particles or radiations. The detector according to the invention comprises a curved body containing a gaseous fluid under pressure, and...
4549108 Multichannel X-ray detector with multiple electrical feedthrough members  
In devices having several electrical connections passing through a separation wall, feedthrough is realized by means of a flexible printed tape. The printed tape includes a number of electrical...
4527084 Radiation counter  
A radiation counter comprises; electrodes made of nickel base super alloy containing the nickel in the weight ratio exceeding 30% and not exceeding 90% and the chrome, the iron, etc. as the...
4501988 Ethylene quenched multi-cathode Geiger-Mueller tube with sleeve-and-screen cathode  
A Geiger-Mueller ("GM") tube containing a noble gas mixture of about 98-99.9% Ne and the remainder Ar, and in addition containing from 2-5% ethylene as the quench gas, provides high stability and...
4501989 Radiation detecting arrangement for counting an ionizing radiation  
A radiation detecting arrangement for measuring or counting an ionizing radiation contains a compensating filter arrangement which safequards a measurement of the radiation dose which is either...
4475043 Xenon x-ray detector with tapered plates  
The leading edge of the plates employed in a high pressure gaseous xenon x-ray detector are tapered so as to be narrower along the edge of the plates nearest to the x-ray source. Xenon x-ray...
4409485 Radiation detector and method of opaquing the mica window  
An improved particle detection tube including a method for applying a radion transparent electrically non-conductive, opaque to ultraviolet light coating to the mica window of the tube. The...
4393306 Radiation detector  
Apparatus is provided for detecting radiation such as gamma rays and X-rays generated in backscatter Mossbauer effect spectroscopy and X-ray spectrometry, which has a large "window" for detecting...
4379248 Ionization chamber having coaxially arranged cylindrical electrodes  
An ionization chamber comprises a plurality of cylindrical electrodes which are coaxially arranged, and a casing which holds the cylindrical electrodes in it under the condition allowing the axial...
4360755 Anode mounting for window type Geiger-Mueller tube  
To prevent the anode wire which runs along the axis of the tube from vibrng at the end adjacent the window, a ceramic cup has a flat surface sealed to the inside of the window, and the end of the...
4359661 Geiger-Mueller tube with tungsten liner  
A highly sensitive Geiger-Mueller radiation detector with improved temperature stability and working life uses a cathode liner made of tungsten. The liner is resistant to attack by the halogen...
4354135 Geiger-Mueller tube with nickel copper alloy cathode  
A highly sensitive Geiger-Mueller radiation detector with improved temperature stability and working life uses a cylindrical cathode made from a nickel copper alloy preferably containing...
4325001 Inorganic spark chamber frame and method of making the same  
A spark chamber frame 8 is manufactured using only inorganic materials. Spark chamber frame 8 includes a plurality of beams 10, 12, 14, and 16 formed from inorganic material, such as ceramic or...
4306155 Gas-filled x-ray detector with improved window  
A multicell x-ray detector of the gas-filled ionization type includes a metal body in which the front, rear, end and bottom walls together with a sealed cover define a channel in which there is a...
4302696 Gamma-ray compensated ionization chamber  
A gamma-ray compensated ionization chamber having cylindrical multiplex electrodes comprises first cylindrical multiplex electrodes and second cylindrical multiplex electrodes being arranged in...
4289967 Multianode cylindrical proportional counter for high count rates  
A cylindrical, multiple-anode proportional counter is provided for counting of low-energy photons (<60 keV) at count rates of greater than 105 counts/sec. A gas-filled proportional counter...
4280075 Device for detecting and locating radiations, and in particular electron releasing phenomea  
A device for detecting and locating radiations, comprising at least one cathode brought to a first potential with respect to a reference potential in a sealed enclosure, a plurality of threadlike...
RE30644 X-ray detector  
An ionization chamber for use in determining the spatial distribution of x-ray photons in tomography systems comprises a plurality of substantially parallel, planar anodes separated by parallel,...
4264816 Ionization chamber  
An ionization chamber has separate drift and detection regions electrically isolated from each other by a fine wire grid. A relatively weak electric field can be maintained in the drift region...
4180754 Geiger-Mueller tube with a re-entrant insulator at opposing sealed ends thereof  
An improved cylindrical Geiger-Mueller tube with a life at least ten times reater than that heretofore obtainable includes a re-entrant insulator at each end of the tube to support the coaxial...
4158774 Radiation detector with improved performance characteristics  
A radiation detector of the gas-filled counter tube type which has a reduced count rate drift. An electrically conductive coating is applied to the interior insulating surfaces in proximity to the...
4149109 Location-sensitive proportional counter tube  
A location- or positionally-sensitive proportional counter tube of high resolution having a trough-shaped cathode in a counting chamber. A resiliently elastic wire forming the anode extends...
4075527 X-ray detector  
An improved x-ray or other ionizing radiation detector comprises an array of adjacent cells comprised of alternately disposed oppositely polarized electrodes and guard electrodes and insulators...
4071763 Electroradiographic device  
Xonics chambers can normally be used only with comparatively low electrode voltages in the Townsend-plateau region of the discharge where no charge carrier multiplication occurs. The sensitivity...
4047039 Two-dimensional x-ray detector array  
A two-dimensional array of ionization chamber x-ray detector cells comprises a plurality of planar anode assemblies disposed equi-distant between parallel cathode plates in a gas of high atomic...
4031396 X-ray detector  
An ionization chamber for use in determining the spatial distribution of x-ray photons in tomography systems comprises a plurality of substantially parallel, planar anodes separated by parallel,...
3988565 Nuclear reactor fuel rod thermal simulator  
The tubular stainless steel structure of a nuclear reactor fuel rod thermal simulator is heated to nuclear fuel rod operating temperatures by means of a gaseous glow discharge established within...
3984691 Modular device for the detection of neutrons  
A device for localizing neutrons is made up of modular elements placed within an enclosure which is transparent to neutrons and filled with a gas, each modular element being constituted by a...
3975638 Method and device for localization of ionizing particles  
An array of needle point anodes has its points uniformly spaced from a sheet cathode. Ionization occurring in an ionizable medium causes electron multiplication in the high electric field of the...
3961196 Miniature ionization chamber  
A miniature ionization chamber having a gas-filled housing which accommodates a guard electrode made in the form of a hollow perforated cylinder. The cylinder is electrically associated with the...
3956654 Long lived proportional counter neutron detector  
A proportional counter neutron detector in which the neutron absorptive material is isolated from the poly-atomic fill gas by a thin film of selected metal or metal oxide, which is substantially...
3934165 Proportional counter end effects eliminator  
An improved gas-filled proportional counter which includes a resistor netk connected between the anode and cathode at the ends of the counter in order to eliminate "end effects".
3916200 Window for radiation detectors and the like  
An improved x- and gamma- radiation and particle transparent window for the environment-controlling enclosure of various types of radiation and particle detectors is provided by a special graphite...