Abstract:
A nuclear level sensing gauge for measuring the level of product in a bin utilizes a plurality of scintillators arranged in a serial fashion. A source of nuclear radiation is positioned adjacent the bin, and the scintillators, which may be bundles of one or more scintillating fibers or scintillating crystals, are positioned in a serial fashion adjacent the bin opposite the source of nuclear radiation, such that nuclear radiation passing through the bin impinges upon the bundles. Light guides carry photons emitted by the scintillators—which are indicative of radiation passing through the bin—to a common photomultiplier tube. The tube is connected to electronics which convert counts of photons from the PMT into a measure of the level of radiation-absorbing product in the bin.
Abstract:
A method of detecting and/or analyzing a radioactive source emitting charged or neutral particles in a biological tissue, consisting essentially in using scintillating fibers having particular ratios of length or diameter to range of the particles emitted by the source; scanning the surface of the material with the detection rod; collecting by means of a SiPM, the scintillation light output generated by the particles having interacted with the scintillating fibers and emitted at the outlet end; optionally selecting signals corresponding to the particles entering the scintillating fibers in a substantially axial direction, that eliminates the particles from certain angles between the axis of the scintillating fiber and the direction of the particles entering the scintillating fiber, correlating the scintillation light output and the selected signals to the presence of a source of radiation located in the material to be analyzed; and optionally communicating these data to the user.
Abstract:
A radiation detection apparatus can include a radiation sensor having a corresponding radiation sensing region, and a photosensor that is optically couple to the radiation sensor. The radiation sensing region can include optical fibers. In an embodiment, some or all of the optical fibers can be coated. The coating can include a phosphorescent material. In an embodiment, the optical fibers can be arranged in a manner such that optical substrates have substantially no bends.
Abstract:
A fiber-optic scintillator radiation detector includes a multitude of optical fibers that each include an optical core. The optical cores are spaced apart from one another by an interposer material. In various embodiments, the interposer material has an average atomic number less than 13 and a density greater than 1.3 g/cm3.
Abstract translation:光纤闪烁体辐射检测器包括多个光纤,每个光纤包括光学核心。 光芯通过插入物材料彼此间隔开。 在各种实施方案中,插入材料的平均原子序数小于13,密度大于1.3g / cm 3。
Abstract:
A gamma vector camera is described for detecting and determining the energy spectrum of a gamma ray source and the direction to the gamma ray source. The gamma vector camera includes a detection system that records a track of a recoil electron produced by a Compton-scattering of an incident gamma ray emitted by the gamma ray source. A processor is configured to determine the energy and the direction of the recoil electron based on the track of the recoil electron recorded by the detection system, and to determine the energy spectrum of the gamma ray source and the direction to the gamma ray source based on the determined energies and directions of a plurality of recoil electrons produced by the Compton-scatterings of a respective plurality of incident gamma rays.
Abstract:
A radiation detection device, system, and method for use in homeland security is disclosed. The device is portable and includes a photomultiplier tube (PMT) connected to an end of a substantially rigid thin-walled aluminum tube. Inside the aluminum tube, a substantially straight scintillating fiber is disposed (so as to be shielded from ambient light), and an end of the scintillating fiber is optically coupled to the PMT. A voltage output signal from the PMT is signal-processed with a filter to remove high-frequency noise (which may arise from solar radiation spikes) and fed to a voltage-responsive alarm or signalling device. The portable device is employed, for example, by responders to nuclear incidents and is packaged as a small wearable hands-free and eyes-free unit with a continuous in-use self-testing feature.
Abstract:
A composition including at least one of a glass composition and a glass ceramic composition, the composition includes a plurality of scintillator crystals.
Abstract:
A luminescent body is for an X-ray detector, in particular for an X-ray computer tomograph. It contains a ceramic of the general composition (M1-xLnx)2O2S, M being at least one element selected from the group: Y, La, Sc, Lu and/or Gd, and Ln being at least one element selected from the group: Eu, Ce, Pr, Tb, Yb, Dy, Sm and/or Ho. In order to improve the spatial resolution of the luminescent body, the ceramic is used in the form of fibers, which are connected in a parallel alignment to constitute a fiber plate.
Abstract translation:发光体用于X射线检测器,特别是用于X射线计算机断层摄影机。 它包含一般组合物的陶瓷(M 1-x N 2 O 2 S 2 M,S M 是选自Y,La,Sc,Lu和/或Gd中的至少一种元素,Ln是选自Eu,Ce,Pr,Tb,Yb,Dy,Sm中的至少一种元素和/或 何 为了提高发光体的空间分辨率,陶瓷以纤维的形式使用,其以平行取向连接以构成纤维板。
Abstract:
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 addition circuit, and an output device. A high voltage direct current (HVDC) source is provided to excite the light detector, while a separate power supply may be provided to power the remaining components. Portability is facilitated by locating the components of the detector within a handheld-sized housing. When bombarded by gamma particles, the radiation sensor emits light, which is detected by the light detector and converted into electrical signals. These electrical signals are then conditioned and converted to spectral lines. The frequency of a give spectral line is associated with a particular radioactive isotope, while the cumulative amplitude of all spectral lines having a common frequency is indicative of the strength and location of the isotope. All or part of this information (identity, strength, direction, and distance) may be provided on the output device.
Abstract:
An apparatus which is capable of detecting the incident direction of a radiation incident from afar and which is made to be small in size and light in weight is provided. The apparatus comprises a radiation detection system 12 having a scintillating optical fiber 10 converting an incident radiation into a light signal, light receiving elements 14a, 14b respectively connected to both ends of said scintillating optical fiber and converting the light signals propagating in two directions along said scintillating optical fiber into electric signals, and a radiation analysis system 16 deriving the incident position of the radiation on the basis of the difference between the arrival times of the electric signals from said light receiving elements. The scintillating optical fiber is arranged in a state of being curved in a circular arc shape, and a large number of flat collimators 18 are arranged on the outer periphery of the scintillating optical fiber in a radial pattern at nearly even intervals.