Patent application number | Description | Published |
20080308737 | Optical Stabilization of a Detector - The invention relates to a detector comprising a scintillator, preferably a scintillator crystal, a light detector with at least one photocathode and a photoelectrometer, preferably a photomultiplier or a hybrid photomultiplier, and a light source, preferably an LED, a laser or a laser diode. The inventive detector is characterized in that it is configured in such a manner that the light produced in the scintillator and the light produced in the light source are injected into the light detector in different sites. | 12-18-2008 |
20090146073 | Method for Signal Separation in Scintillation Detectors - Method for separation of effective pulses and test pulses in scintillation detectors, preferably for detection of ionizing radiation, comprising at least the following method steps: Selecting a pulsed test light source, preferably a pulsed LED, with single test light pulses of which has a chronological sequence of the relative light intensity, which differs from the chronological sequence of the relative light intensity of the measurement light pulses, feeding the test light pulses generated by the test light source into the light detector of the scintillation detector for measurement of the test light pulses by the light detector, analyzing the chronological sequence of the relative light intensities of the pulses measured by the scintillation detector, separating the measured pulses by using the different chronological sequences of the relative light intensities in test light pulses and measurement light pulses. | 06-11-2009 |
20100001201 | STABILIZATION OF A SCINTILLATION DETECTOR - A detector for the measurement of radiation, preferably ionizing radiation, includes a medium, means for the conversion of the radiation energy absorbed by the medium into electrical charge, means for digital sampling of the charge signals, means for the determination of a calibration factor K, and means for the stabilization of the output signals of the detector. The medium at least partly absorbs the radiation to be measured. The electric charge is at least partially proportional to the energy of the radiation. The sampling is done preferably with a sampling rate between 1 and 1000 MHz. Further signal processing is digital. The calibration factor K has a fixed relation with respect to the decay time τ of the medium. The output signals of the detector are mainly proportional to the radiation energy, and are stabilized with the help of the calibration factor K. | 01-07-2010 |
20100181488 | Solid State Neutron Detector - The invention relates to a neutron detector for detection of neutrons in fields with significant γ- or β-radiation, comprising a neutron sensitive scintillator crystal, providing a neutron capture signal being larger than the capture signal of 3 MeV γ-radiation, a semiconductor based photo detector being optically coupled to the scintillator crystal, where the scintillator crystal and the semiconductor based photo detector are selected so that the total charge collection time for scintillator signals in the semiconductor based photo detector is larger than the total charge collection time for signals generated by direct detection of ionizing radiation in the semiconductor based photo detector, the neutron detector further comprising a device for sampling the detector signals, a digital signal processing device, means which distinguish direct signals from the semiconductor based photo detector, caused by γ- or β-radiation and being at least partially absorbed in the semiconductor based photo detector, from light signals entering the semiconductor based photo detector, after being emitted from the scintillator crystal after capturing at least one neutron, by means of pulse shape discrimination, utilizing a difference between the total charge collection time for scintillator signals from the total charge collection time for signals generated by direct detection of ionizing radiation in the semiconductor based photo detector, and means which distinguish neutron induced signals from γ-radiation induced signals in the scintillator crystal by discriminating the different signals via their pulse height, making use of the difference between the number of photons generated by neutron and γ-radiation in the field of interest. | 07-22-2010 |
20100200762 | DUAL-RANGE PHOTON DETECTOR - The invention relates to a detector for measuring nuclear radiation, especially gamma-radiation, comprising a scintillator crystal with a light decay time of less than 100 ns, a silicon drift detector (SDD) for the measurement of both direct hits of low energy radiation and the light, being emitted from the scintillator crystal, the silicon drift detector being mounted between the scintillation crystal and the radiation entry window, a preamplifier, connected to the SDD, electronic devices, being capable of determining the signal rise time of the measured signals and of separating the signals on the basis of said rise time, electronic devices, being capable of separately collecting the energy spectra of SDD and scintillator detection events on the basis of the different rise times. | 08-12-2010 |
20110012012 | METHOD FOR LINEARIZING AN ENERGY SPECTRUM OF RADIATION DETECTORS - A method for linearizing a radiation detector is provided, the method including measuring a pulse height spectrum of a predetermined radiation source, identifying at least one spectrum template for the predetermined radiation source, and determining a linearization function by comparing the measured pulse height spectrum with the at least one identified spectrum template. The at least one spectrum template is a predefined synthesized energy spectrum for the predetermined radiation source and for the corresponding radiation detector. Further, a detector for measuring one or more types of radiation is provided, the detector being adapted for transforming the measured pulse height spectrum in an energy-calibrated spectrum, the transformation including a linearization step, where a linearization function used with the linearization step is determined according to the inventive method. | 01-20-2011 |
20110101232 | Detector for the Measurement of Ionizing Radiation - The invention relates to a detector for the measurement of ionizing radiation, preferably γ-radiation and x-rays, comprising a scintillator and a light detector, the light detector being stabilized by using a predefined light source, preferably a Light Emitting Diode (LED), where the length and/or shape of the light pulses of the light source is different from the length and/or shape of the light pulses emitted by the scintillator. The light source induced pulses and the radiation induced pulses are separated from all other pulses on the basis of their pulse width. The detector is additionally stabilized by correcting the measured light output, that is the pulse height of the output signals, of the detector with the detector temperature shift, being dependant from the average pulse width of the accumulated γ-pulses. | 05-05-2011 |
20120074326 | APPARATUS AND METHOD FOR NEUTRON DETECTION WITH NEUTRON-ABSORBING CALORIMETRIC GAMMA DETECTORS - An apparatus for detecting neutron radiation includes a gamma ray scintillator having an inorganic material with an attenuation length L | 03-29-2012 |
20120080599 | APPARATUS AND METHOD FOR NEUTRON DETECTION BY CAPTURE-GAMMA CALORIMETRY - An apparatus for detecting neutron radiation includes a first section with a high neutron absorption capability and a second section with a low neutron absorption capability. The second section includes a gamma ray scintillator having an inorganic material with an attenuation length of less than 10 cm for gamma rays of 5 MeV energy. The material of the first section releases the energy deployed in the first section by neutron capture mainly via gamma radiation. A substantial portion of the first section is covered by the second section. An evaluation device determines the amount of light detected by a light detector for one scintillation event, and the amount is in a known relation to the energy deployed by gamma radiation in the second section. The evaluation device classifies detected radiation as neutrons when the measured total gamma energy E | 04-05-2012 |
20120114100 | DIRECTIONAL GAMMA RADIATION DETECTOR SYSTEM - A directional gamma radiation detector system for determining an angle under which a measured gamma radiation hits a gamma radiation detector system, includes gamma radiation detectors arranged in close distance; detector electronics for operating the at least two gamma radiation detectors as spectrometers in a way that the detector electronics are collecting energy spectra of the detected gamma rays for each gamma radiation detector; and system electronics allowing the directional gamma radiation detector system to identify coincident events in the at least two gamma radiation detectors. | 05-10-2012 |
20150087882 | METHOD AND APPARATUS FOR MONITORING THE RANGE OF A PARTICLE BEAM - The invention is related to a method for monitoring a range of a particle beam in a target. The method is using gamma detectors for detecting prompt gammas produced in the target. The time differences between the time of detecting a gamma quantum and a time of emission of a particle or a bunch of particles from the radiation device are determined. A statistical distribution of those time difference is used to deduce information related to the range of the beam. The invention is also related to an apparatus for monitoring a range based on measured time profiles of detected prompt gammas. | 03-26-2015 |