68 results about "Scintillating fiber" patented technology

The invention relates to an optical fiber coupling organic scintillating fiber pulse neutron probe comprising a probe and a photoelectric converter, wherein the probe comprises a metal shell and a radiation sensitive unit positioned at a central position on the shell, the shell is provided with a probe incident window and a probe exit window along the beam incident direction, and the probe also comprises a light guide bundle used for connecting the probe and the photoelectric converter; the radiation sensitive unit is an organic scintillating fiber linear array formed by a single layer of organic scintillating fibers which are parallelly arranged, and the organic scintillating fiber linear array is arranged perpendicularly to the beam incident direction and fixed on the inner side wall of the metal shell; the light guide bundle is formed by a plurality of silica optical fibers which are bundled cables, and the silica optical fibers are coupled with the organic scintillating fibers one to one; and a light exit surface at the tail end of the light guide bundle is aligned with an incident window of the photoelectric converter. The optical fiber coupling organic scintillating fiber pulse neutron probe solves the technical problems that the existing pulse neutron probe cannot satisfy the requirements of fast response time, high n / gamma sensitivity ratio, strong anti-electromagnetic interference capability and low shield simultaneously, and has high n / gamma sensitivity ratio and strong anti-gamma interference capability.

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.

The invention relates to a novel single-ion microbeam detector based on a plastic scintillating fiber, comprising a microscope, wherein a single-ion microbeam is arranged below the objective lens of the microscope; an exit port of the single-ion microbeam rightly faces the objective lens of the microscope; and a sample to be measured is arranged between the objective lens of the microscope and theexit port of the single-ion microbeam. The novel single-ion microbeam detector based on the plastic scintillating fiber also comprises a plastic scintillating fiber which is squashed and a photomultiplier, wherein the squashed part of the plastic scintillating fiber is located between the exit port of the single-ion microbeam and the sample to be measured; two ends of the plastic scintillating fiber are respectively coupled with the photomultiplier; the single-ion microbeam sends out an ion to the sample to be measured when the ion passes through the plastic scintillating fiber, the plastic scintillating fiber generates a photon and transmits the photon to the photomultiplier which converts an optical signal into an electrical signal, and then the ion passes through the plastic scintillating fiber and bombards the sample.

The invention discloses an ultrafast gamma ray energy spectrum measuring instrument based on a scintillating-fiber array. The ultrafast gamma ray energy spectrum measuring instrument comprises the scintillating-fiber array and a detector array which are arranged sequentially along the incidence direction of an ultrafast gamma ray, and the output end of the detector array is connected with the input end of the scintillating-fiber array. According to the ultrafast gamma ray energy spectrum measuring instrument based on a scintillating-fiber array, a detecting channel of the separated ultrafast gamma rays is formed by each scintillating-fiber and the corresponding detector of the scintillating-fiber and the crosstalk problem of the photon in the detector is avoided; the ultrafast gamma ray energy spectrum measuring instrument has the advantages that the detecting accuracy is high, the structure is simple and compact, and the use is flexible.

An apparatus and method for in vivo and ex vivo control, detection and measurements of radiation in brachytherapy accomplished through scintillating material detection. One example includes scintillating fibers placed along a delivery guide such as a catheter for measuring applied radiation levels during brachytherapy treatments, sensing locations of a radiation source or providing feedback of sensed radiation. The catheter may also be a mammosite type catheter. The scintillating fibers provide light output levels correlating to the levels of radiation striking the fibers. The output may then be used to measure and compute radiation distribution maps using Monte Carlo reconstruction simulation. Adjustments to a radiation treatment may be made as needed based on actual and measured applied dosages. Characteristics of a radiation source may also be measured using scintillating materials.

A firearm sight comprising a generally circular sight support ring surrounding and removably holding an optically clear generally circular lens, said lens having a cylindrical shape, front and back faces, a diameter greater than the thickness of the lens, and a scintillating fiber optic member centrally embedded within said circular lens, a means for mounting said circular sight support ring to a firearm, and a means of adjusting said circular support ring in relation to said means for mounting said ring to a firearm.