37 results about "Beam monitor" patented technology

A method and apparatus for monitoring a scanning beam of penetrating radiation, such as a scanning proton beam used to irradiate tissue. The position of the beam is tracked in real time by interposing a scintillator film between a source and an object of irradiation. An imaging detector, in optical communication with the scintillator, provides an output that is indicative of the position of the radiation and its variation with time. The accumulated dose over a scan may also be monitored.

A synchrocyclotron comprises a resonant circuit that includes electrodes having a gap therebetween across the magnetic field. An oscillating voltage input, having a variable amplitude and frequency determined by a programmable digital waveform generator generates an oscillating electric field across the gap. The synchrocyclotron can include a variable capacitor in circuit with the electrodes to vary the resonant frequency. The synchrocyclotron can further include an injection electrode and an extraction electrode having voltages controlled by the programmable digital waveform generator. The synchrocyclotron can further include a beam monitor. The synchrocyclotron can detect resonant conditions in the resonant circuit by measuring the voltage and or current in the resonant circuit, driven by the input voltage, and adjust the capacitance of the variable capacitor or the frequency of the input voltage to maintain the resonant conditions. The programmable waveform generator can adjust at least one of the oscillating voltage input, the voltage on the injection electrode and the voltage on the extraction electrode according to beam intensity and in response to changes in resonant conditions.

The present invention is a method to enhance accuracy of irradiation with beam for an irradiation system with a beam. The irradiation system comprises a beam generation source, a mass analysis device, a beam transformer, a scanner which swings the beam reciprocally with high speed, a beam parallelizing device, an acceleration / deceleration device, an energy filtering device, and beam monitors. The beam transformer comprises a vertically focusing synchronized quadrupole electromagnet syQD and a horizontally focusing synchronized quadrupole electromagnet syQF. Consequently, it is possible to correct at least one of a deviation in beam divergence angle and a deviation in beam size within a range between a center trajectory and an outer trajectory after swinging of the beam by the scanner.

A method and apparatus for monitoring a scanning beam of penetrating radiation, such as a scanning proton beam used to irradiate tissue. The position of the beam is tracked in real time by interposing a scintillator film between a source and an object of irradiation. An imaging detector, in optical communication with the scintillator, provides an output that is indicative of the position of the radiation and its variation with time. The accumulated dose over a scan may also be monitored.

The embodiment of the invention provides a beam monitoring object determination method. The method comprises the steps of determining transmission configuration indication information of control channels; determining a reference signal set q1 according to the transmission configuration indication information, wherein the q1 comprises reference signals for indicating space parameters; and determining a beam monitoring reference signal set q1 according to types of the reference signals. The embodiment of the invention also provides a beam monitoring object determination device and a computer memory medium.

The embodiments of the invention provide a communication method, device and system. User equipment and network equipment can communicate by using a plurality of beams, wherein the beams include a first beam and at least one second beam, the first beam is a service beam monitoring control information for the user equipment, and the second beams are beams other than the service beam. The method includes the following steps: user equipment determines that a service beam is blocked; and the user equipment obtains a first message from network equipment through a first beam or a second beam. In themethod, the UE (User Equipment) can determine that the service beam is blocked and then obtain the first message sent by the network equipment, so as to eliminate the adverse effect caused by servicebeam blocking. Accordingly, the network equipment can determine that the service beam is blocked and then send the first message, so as to eliminate the adverse effect caused by service beam blocking.

Disclosed is a beam monitor system in which signals outputted from a plurality of wires are divided in a multi-wire type monitor for measuring a beam profile of a charged particle beam, an identical number of the wires are grouped, the signals of the respective groups are taken out one piece by one piece to be connected with each other, and the number of the pieces, corresponding to a number of the wires belonging to the one group, are put together to be connected to a signal processor storing connection information.

The invention provides a particle irradiation device and a particle treatment system. The particle radiation device is used for irradiating particle beam in a tumor zone. The particle radiation device comprises a treatment head and an irradiation control system. The treatment head comprises a bellows, a first scanning magnet, a second scanning magnet, a second vacuum box, a beam spot size regulation device, and a vacuum window beam monitoring module; the downstream of the beam monitoring module is provided with a movably connected ridge-shaped filter, a gunshot compensator and a collimator; the ridge-shaped filter is provided with a fixing device, a main body and a position regulation device which is connected to an irradiation control system in order to drive the main body to move along the changing direction of the height and the thickness in the irradiation implementation; the irradiation control systems controls the first scanning magnet and the second scanning magnet to deflect the particle beam to the position corresponding to the tumor target zone, and controls the beam monitoring module to monitor the dosage of the particle beam and the position information. The invention allows the doctor to perform either two-dimension irradiation therapy or three-dimension irradiation therapy on one device according to the clinical requirement.

The invention relates to a device used in 3-D conformal radiotherapy to gross tumor volume with heavy ion beams, comprising a magnet scanning system, a beam monitor system, a mini-ridge filter, a range shifter, a multi-leaf collimator and a patient body surface compensator, which are sequentially arranged on the body surface of the patient. The centers of the components and the center of the gross tumor volume are located at the beam axis. The invention overcomes the defects that the conformality is low and the scatterer impairs beam quality in current 2-D conformal radiotherapy by heavy ion beams based on a passive beam flow distribution system, and adopts 3-D conformal irradiation without the scatterer needed in current 2-D conformal radiotherapy, thus improving conformality in the therapy to the gross tumor volume with heavy ion beams. The invention can protect the health organs around the gross tumor volume to the largest extent and reduce incidence of disease at the normal organs without reducing the rate of using large quantity of Bragg peak to efficiently kill the cells in the gross tumor volume, thus improving curative effect of the heavy ion beams.

A dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources includes a detector arrangement consists of three detectors downstream from the object under observation. The latter detector, which operates as a beam monitor, is an integrating detector that monitors the total beam power arriving at its surface. The first detector and the middle detector each include an integrating detector surrounding a foil. The foils of these two detectors are made of the same atomic material, but each foil is a different isotope, e.g., the first foil may comprise U235 and second foil may comprise U238. The integrating detectors surrounding these pieces of foil measure the total power scattered from the foil and can be similar in composition to the final beam monitor. Non-resonant photons will, after calibration, scatter equally from both foils.

The invention relates to an interior charging and discharging characteristic stimulation test system and method of a high-power part and belongs to the technical field of space testing. The interior charging and discharging characteristic stimulation test system comprises an electronic accelerator, a vacuum air exhausting group, a vacuum target chamber, a testing chamber and an electric current loop arranged between the vacuum target chamber and the testing chamber, wherein a sample table, an insulating support, a non-contactable potentiometer probe and a faraday cup are arranged in the vacuum target chamber; and an electronic accelerator control system, the non-contactable potentiometer probe, a beam monitoring instrument, an oscillometer, a driving mechanism, an electronic load and a vacuum gauge are arranged in the testing chamber. High-power part samples are filled in the interior charging and discharging characteristic stimulation test system through high-energy electrons, the oscillator is opened for monitoring discharging signals in the samples, and potential on the surfaces of the samples can be tested through the non-contactable potentiometer probe. The interior charging and discharging characteristic stimulation test method measures medium charging potential in a sensing method, and the charging and discharging effect of materials cannot be influenced.

A beam detector and a beam monitor using the same are provided, the beam detector being capable of precisely and stably detecting, for a long period of time, the position, the intensity distribution, and the change with time of radiation beams, soft x-ray beams, and the like and being manufactured at a low cost as compared to that of a conventional detection device.In a beam detector 2 for detecting the position and intensity of beams, a beam irradiation portion 6 to be irradiated with beams 7 is formed of a polycrystalline diamond (C) film 4 containing at least one element (X) selected from the group consisting of silicon (Si), nitrogen (N), lithium (Li), beryllium (Be), boron (B), phosphorus (P), sulfur (S), nickel (Ni), and vanadium (V) at an X / C of 0.1 to 1,000 ppm, and this polycrystalline diamond film 4 has a light emission function of performing light emissions 8 and 8a when it is irradiated with the beams 7. By the beam detector 2 as described above and light emission observation means 3 and 3a for observing the above light emission phenomenon, a beam monitor 1 is formed.

A charged particle beam irradiation system in which the energy, Bragg peak, and irradiation depth of a charged particle beam, with which a patient is to be irradiated, can be checked in real time just before actual irradiation. Just before the actual irradiation, by providing a high-speed steering magnet with 100% current, a checking beam is intentionally hit into a beam damper. By using a dosimeter and a dose measuring device in front thereof, extraction beam intensity is measured. By using a multi-layer beam monitor, a dose distribution thereof is measured. Accordingly, just before the actual irradiation, the energy, Bragg peak, and irradiation depth of the charged particle beam, with which the patient is to be irradiated, can be checked accurately and in real time. When the beam has a desired dose distribution as a result of checking, continuously, extraction control is performed.

A beam detector and a beam monitor using the same are provided, the beam detector being capable of precisely and stably detecting, for a long period of time, the position, the intensity distribution, and the change with time of radiation beams, soft x-ray beams, and the like and being manufactured at a low cost as compared to that of a conventional detection device. In a beam detector 2 for detecting the position and intensity of beams, a beam irradiation portion 6 to be irradiated with beams 7 is formed of a polycrystalline diamond (C) film 4 containing at least one element (X) selected from the group consisting of silicon (Si), nitrogen (N), lithium (Li), beryllium (Be), boron (B), phosphorus (P), sulfur (S), nickel (Ni), and vanadium (V) at an X / C of 0.1 to 1,000 ppm, and this polycrystalline diamond film 4 has a light emission function of performing light emissions 8 and 8a when it is irradiated with the beams 7. By the beam detector 2 as described above and light emission observation means 3 and 3a for observing the above light emission phenomenon, a beam monitor 1 is formed.

The invention relates to the technical field of multi-channel charge front-end reading circuits for beam monitoring, in particular to a controllable multi-channel charge reader. The controllable multi-channel charge reader is characterized by comprising a speed-sensitive switch, integrators with a releasing function, a multiplexer, a control logic circuit, a differential output driving circuit and a data acquisition card which are connected in sequence, the charge reader is used for reading charge (current) signals of a beam monitoring stripping ionization chamber, the measuring range is controllable, the integration duration is controllable, the working mode (continuous reading / intermittent reading) is controllable, and using is flexible; each channel contains two integrators (A and B), the two integrators can work in a time-sharing mode, and then signal processing efficiency is improved; due to the fact that a multiplexing circuit is adopted for serial output of signals, the complexity of data acquisition and the manufacturing cost of a processing system can be effectively reduced, and the accuracy of a heavy ion cancer treatment system is improved. The circuit is high in accuracy, linearity and flexibility and simple in structure.

A charge collection electrode is formed of a plurality of groups each of which is made up of a plurality of adjoining wire electrodes. Further, all the wire electrodes are connected to channels of a signal processing device 22 by the same number of lines as the wire electrodes belonging to one group so that each detection signal outputted from one wire electrode selected from each group is inputted through the same line and so that no two adjoining channels are physically continuous in regard to a certain set of consecutive measurement channels. The signal processing device 22 determines group information indicating to which group the wire electrodes that sent the inputted detection signals belong and outputs a processing signal including the group information to a beam monitor controller 8b2. The beam monitor controller 8b2 determines the position and the beam width of the charged particle beam 12 that passed through the wire electrodes.

In the working process of an electron accelerator, the transport of an electron beam is invisible in an electron accelerating tube, and the transport of the electron beam is difficult to monitor in an electron accelerating tube section. In order to solve the problems, the invention provides an electron beam monitoring device, which is characterized by consisting of four probes, two flanges and a pipeline. Two sides of the pipeline is welded with the flanges; each probe consists of a receiving board, a joint, a Kovar insulation sleeve and four shaft rods; the receiving board is fixedly connected with one end of the shaft rods inserted into inside the pipeline through a bolt; the joint is sleeved on the shaft rods and fixedly welded with the outer wall of the pipeline; the Kovar insulation sleeve is sleeved on the shaft rods, one end of the Kovar insulation sleeve is welded with the joint, and the other end of the Kovar insulation sleeve is welded with the shaft rods; and the probes are uniformly and circumferentially installed on the same vertical plane of inner side of the pipeline. The device detects whether improper transport statuses such as broken stream occur during the outputting electron beams of the electron accelerator through a beam signal output by the monitoring probes, thereby providing objective basis for the diagnosis of beam statuses of the electron accelerator and contributing to improvement on the safe reliability of the electron accelerator.

A dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources includes a detector arrangement consists of three detectors downstream from the object under observation. The latter detector, which operates as a beam monitor, is an integrating detector that monitors the total beam power arriving at its surface. The first detector and the middle detector each include an integrating detector surrounding a foil. The foils of these two detectors are made of the same atomic material, but each foil is a different isotope, e.g., the first foil may comprise U235 and second foil may comprise U238. The integrating detectors surrounding these pieces of foil measure the total power scattered from the foil and can be similar in composition to the final beam monitor. Non-resonant photons will, after calibration, scatter equally from both foils.

The invention discloses a proton treatment device beam diagnosis system, which comprises a beam contour monitor, a beam position monitor, a collimator and a beam intensity monitor which are sequentially arranged along a proton transmission direction. Compared with the prior art, the flow intensity, the section size and shape, the mass center track position and the emittance of the proton beam current are independently measured; and the measurement equipment needs to be placed, installed and calibrated when each measurement is carried out. The beam diagnosis system is integrated, return signalsof the three beam monitors can be read at the same time, the flow intensity, the section size and shape, the mass center track position and the emittance of proton beams are measured in real time, and the beam diagnosis system has the advantages of being simple in measurement process, convenient to operate, high in real-time performance and the like. Besides, the system can detect beam halo information, provide the whole beam size including beam halo, prevent particles from colliding with the wall of the vacuum tube, and reduce beam loss.

Aspects relate to detecting beam failure. A beam failure in a full-duplex communication scenario may be detected based on a reference signal measurement. For example, a user equipment (UE) may measure a downlink reference signal transmitted by a base station and / or an uplink reference signal transmitted by the UE and derive a quality parameter based on one or both of these measurements. If the quality parameter indicates a beam failure, the UE may generate an indication that one or more of the beams monitored by the UE have failed.

The invention provides a hadron beam monitoring device based on a pixel sensor chip. The hadron beam monitoring device comprises a vertical support and two independent two-dimensional monitoring devices. Two two-dimensional monitoring devices are fixed on two vertical plates of the vertical support. Each two-dimensional monitoring device is composed of a silicon pixel chip, a chip bonding circuit board, an anode plate and a cathode plate. A device monitoring method comprises the steps that a hadron beam passes through gas above a silicon pixel chip, so that the gas is ionized to produce an electron cluster; the electron cluster drifts under the action of an electric field above the silicon pixel chip, and is collected by a corresponding pixel on the silicon pixel chip; according to the pixel response on the silicon pixel chip, the two-dimensional information of the plane of the hadron beam on the silicon pixel chips is acquired; the hadron beam successively passes through the spaces above the silicon pixel chips which are mutually vertical on two two-dimensional monitoring devices; and the three-dimensional distribution of the hadron beam is reconstructed. According to the invention, the three-dimensional distribution information of the hadron beam is monitored in real time, and the device and the method have the advantages of beam non-blocking performance, radiation resistance and high position resolution.

A beam monitor system having a simple configuration for improving a measurement precision specifying a position and the width. A beam monitor system, comprising collection electrodes that include a plurality of groups each having a plurality of adjacent wire electrodes, and detect an ionized particle beam passing therethrough, a first signal processing device that sets one wire electrode in the groups of the collection electrodes as a typical wire electrode, receives a detection signal output from the typical wire electrode to process the signal and a beam monitor controller that obtains a beam position of the ionized particle beam that has passed through the wire electrodes on the basis of a processed signal from the first signal processing device.

A beam monitor system having a simple configuration for improving a measurement precision specifying a position and the width. A beam monitor system, comprising collection electrodes that include a plurality of groups each having a plurality of adjacent wire electrodes, and detect an ionized particle beam passing therethrough, a first signal processing device that sets one wire electrode in the groups of the collection electrodes as a typical wire electrode, receives a detection signal output from the typical wire electrode to process the signal and a beam monitor controller that obtains a beam position of the ionized particle beam that has passed through the wire electrodes on the basis of a processed signal from the first signal processing device.

The invention provides a particle irradiation device and a particle treatment system. The particle radiation device is used for irradiating particle beam in a tumor zone. The particle radiation device comprises a treatment head and an irradiation control system. The treatment head comprises a bellows, a first scanning magnet, a second scanning magnet, a second vacuum box, a beam spot size regulation device, and a vacuum window beam monitoring module; the downstream of the beam monitoring module is provided with a movably connected ridge-shaped filter, a gunshot compensator and a collimator; the ridge-shaped filter is provided with a fixing device, a main body and a position regulation device which is connected to an irradiation control system in order to drive the main body to move along the changing direction of the height and the thickness in the irradiation implementation; the irradiation control systems controls the first scanning magnet and the second scanning magnet to deflect the particle beam to the position corresponding to the tumor target zone, and controls the beam monitoring module to monitor the dosage of the particle beam and the position information. The invention allows the doctor to perform either two-dimension irradiation therapy or three-dimension irradiation therapy on one device according to the clinical requirement.

The invention discloses an intensity-modulated radiation therapy apparatus. The apparatus can provide rapid and effective therapy, and also can realize real-time monitoring of the ray beam of the therapy apparatus and the running state of a multi-leaf collimator during radiation and real-time detection of the shape and the dosage of a radiation field. The apparatus comprises a radiation source generating device and a ray beam monitoring device which are mounted on an inner annular frame; and the inner annular frame can rotate around an outer annular frame by + / - 180 DEG, the inner annular frame and The outer annular frame can tilt by + / - 30 DEG around their longitudinal axes, and at least one independent ray beam monitor is mounted on a bracket at the therapy ray beam outlet end of the inner annular frame to monitor the therapy ray beam and the running state of the multi-leaf collimator operating status during radiation. The therapy apparatus reserves the characteristics of X-knife orgamma-knife multi-field spatial focusing, also reserves the advantages of the large field intensity-modulated radiation therapy of conventional cobalt-60 therapy machines and medical accelerator therapy machines, and can enforce X-knife or gamma-knife radiation on large-size tumors.

Beam detectors configuring a beam monitor are connected to a single current measurement apparatus through respective switches. If a width of a beam incident hole of each of the beam detectors 32 in the X direction is Wf, a gap between the beam incident holes of adjacent beam detectors in the X direction is Ws, a beam width of the ion beam in the X direction is Wb, a total number of beam detectors is “p”, and “n” is an integer of 0≦̸n≦̸(p−2) and satisfying Wb<{n·Wf+(n+1)Ws}, a measuring process of receiving the ion beam by the beam monitor and measuring the waveforms of the beam currents flowing into the current measurement apparatus in a state in which the plurality of switches skipped by “n” are simultaneously switched ON and a switching process of switching the switches simultaneously switched ON under the condition, are repeated.