Abstract:
The invention relates to a detector (20) for detecting radon and the decay products thereof in the surrounding air, including in particular aerosols, characterised in that it comprises: a silicon pellet having a PN junction with a deserted area, for transmitting signals under the action of the radiation generated by radon and said decay products; a passivation layer (22) covering said silicon pellet and enabling the operation of said detector in open air; and a conducting layer (24) covering the passivation layer and defining a radionuclide collecting electrode. The invention also relates to a detection device including said detector.
Abstract:
A direct ion storage (DIS) radiation detector or dosimeter has a design that is easy and low cost to manufacture using semiconductor processing techniques. The detectors include internal communications interfaces so they are easy to read. Different interfaces, including wired, e.g. USB ports, and wireless interfaces, may be used, so that the dosimeters may be read over the internet. The detectors can thus be deployed or used in a variety of detection systems and screening methods, including periodic or single time screening of people, objects, or containers at a location by means of affixed dosimeters; screening of objects, containers or people at a series of locations by means of affixed dosimeters, and surveillance of an area by monitoring moving dosimeters affixed to people or vehicles.
Abstract:
The present invention relates to a dosimetry device (10) for verification of the quality of a radiation beam in standard and conformal radiation therapy, and in particular for IMRT (Intensity Modulated Radiation Therapy) applications, comprising an active area comprising individual radiation detectors, wherein the active area comprises a limited number of lines (70, 71, 80, 81, 90) of radiation detectors, and the active area further comprises extra radiation detectors (52, 62) dedicated to the energy measurement of electrons or photons, and it comprises a build-up plate (50, 60), with energy degraders (53, 63), said energy degraders (53, 63) being located upstream said extra radiation detectors (52, 62) in the path of said radiation beam.
Abstract:
A real time radiation dosimeter includes a first electrode and a second electrode, such as cathode and anode electrodes. The second electrode is based on carbon nanomaterials, such as carbon nanotubes bucky paper, carbon nanotubes forest and graphene film. The dosimeter is connected to an electrometer, able to apply a bias voltage between the electrodes and to measure the collected charge. The manufactured detectors display an excellent linear response to dose. The dosimeter with nanotubes forest is able to collect charge also to zero voltage, allowing in vivo applications. The use of nanomaterials allows a miniaturized version of dosimeters.
Abstract:
The invention relates to an x-ray dosimeter comprising a first capacitor plate (1) and a second capacitor plate (2) which are arranged in a chamber or form parts of a chamber (4), said chamber (4) being filled with a gaseous medium. The first capacitor plate (1) comprises an active measuring field (5) on the side thereof facing the second capacitor plate (2), and the second capacitor plate (2) comprises an electron-emitting x-ray absorption layer (6) on the side thereof facing the first capacitor plate (1).
Abstract:
The detector system includes three substantially similar detectors (10, 10') each of which includes an ionization chamber having a pedestal therein mounting a charged electret. Two chambers are completely sealed except for an equalization aperture. However, gamma rays produce ionization that neutralizes portions of the electret charge in these sealed chambers. The third detector has filtered inlet opening (42), which permit entry of radon gas, and responds to gamma rays and radon gas. By keeping the three units together until the test starts, one of the sealed containers can have the charge on its electret measured at the beginning of the test in order to provide a baseline measurement. At the end of the test, the charges on the other two electrets are measured and by appropriate calculations, an accurate measure of radon concentration at the test site can be obtained.
Abstract:
A real time radiation dosimeter includes a first electrode and a second electrode, such as cathode and anode electrodes. The second electrode is based on carbon nanomaterials, such as carbon nanotubes bucky paper, carbon nanotubes forest and graphene film. The dosimeter is connected to an electrometer, able to apply a bias voltage between the electrodes and to measure the collected charge. The manufactured detectors display an excellent linear response to dose. The dosimeter with nanotubes forest is able to collect charge also to zero voltage, allowing in vivo applications. The use of nanomaterials allows a miniaturized version of dosimeters.
Abstract:
A direct ion storage (DIS) radiation detector or dosimeter has a design that is easy and low cost to manufacture using semiconductor processing techniques. The detectors include internal communications interfaces so they are easy to read. Different interfaces, including wired, e.g. USB ports, and wireless interfaces, may be used, so that the dosimeters may be read over the internet. The detectors can thus be deployed or used in a variety of detection systems and screening methods, including periodic or single time screening of people, objects, or containers at a location by means of affixed dosimeters; screening of objects, containers or people at a series of locations by means of affixed dosimeters, and surveillance of an area by monitoring moving dosimeters affixed to people or vehicles.
Abstract:
L'objet de l' invention est un détecteur (20) de radon et de ses descendants présents dans l'air environnant incluant notamment des aérosols, caractérisé en ce qu'il comprend : une pastille de silicium intégrant une jonction PN avec une zone désertée, destinée à émettre des signaux sous l'action des rayonnements émis par ledit radon et lesdits descendants; une couche (22) de passivation qui recouvre cette pastille de silicium et permettant au détecteur de travailler à l'air libre; et une couche (24) conductrice recouvrant la couche de passivation et formant électrode de collecte des radionucléides. L' invention couvre aussi le dispositif de détection incluant ledit détecteur.