122 results about "Superconducting cyclotron" patented technology

The invention discloses a proton therapy system based on a compact superconducting cyclotron. The proton therapy system includes a superconducting cyclotron system, an energy selection system and a beam transportation system, a fixed treatment room subsystem and a rotary frame treatment subsystem; the fixed energy proton beam led out by the superconducting cyclotron in the superconducting cyclotron system can be a continuously adjusting proton beam of 70-200MeV via the energy selection system, so that the longitudinal adjustment of the range during the proton therapy of tumors can be met; thebeam is transmitted to the fixed treatment room subsystem and the rotary frame treatment subsystem via the beam transportation system; the superconducting cyclotron system, the energy selection system, the beam transportation system and a treatment head are subjected to cooperative control to realize the transverse expansion of the proton beam, so that the intensity modulation treatment of the tumor can be completed. According to the invention, the innovation is good, the practicability is high, the beam intensity of the superconducting cyclotron is adjustable, and the intensity modulation treatment can be realized; and the system has an extremely important promotion effect on the accuracy, effectiveness and high efficiency of tumor treatment of a patient.

The invention relates to a beam extraction method for an intermediate energy superconducting proton cyclotron. The fundamental harmonic procession is introduced in the method to increase the distance of an extraction ring, on the basis that two electrostatic deflection plates extract a beam, a plurality of passive magnetic channels are arranged on a beam track with the combination of the characteristic of the superconducting cyclotron, so that a beam phase space on an extraction path is matched through a mode like beam line design, then the beam loss after deflecting the plate is reduced to the greatest extent, and the final extraction efficiency can be 80% or above.

A system for ion acceleration for medical purposes includes a conventional or superconducting cyclotron, a radiofrequency linear accelerator (Linac), a Medium Energy Beam Transport line (MEBT) connected, at the low energy side, to the exit of the cyclotron, and at the other side, to the entrance of the linear radiofrequency accelerator, as well as a High Energy Beam Transport line (HEBT) connected at high energy side to the radiofrequency linear accelerator exit and at the other end, to a system for the dose distribution to the patient. The high operation frequency of the Linac allows for reduced consumption and a remarkable compactness facilitating its installation in hospital structures. The use of a modular LINAC allows varying in active way the energy and the current of the therapeutic beam, having a small emittance and a time structure adapted to the dose distribution based on the technique known as the “spot scanning”.

The invention discloses a radial motion device for magnetic measurement sensors for a compact superconducting cyclotron. The radial motion device comprises a sensor slide plate, an optical scale, Hall sensors, a filament, a screw rod, a slider, a fixed pulley, a servo motor, a data transmission line and a data collector, wherein the servo motor drives the slider mounted on the screw rod to move linearly vertically; one end of the filament is fixed on the slider, and the other end of the filament bypasses the fixed pulley to reach the mid-plane of a magnetic field, turns to the horizontal direction, is connected to the sensor slide plate and finally bypasses the fixed pulley, and a closed-loop system is formed; the Hall sensors are arranged on the sensor slide plate; the data transmission line is connected with the Hall sensors and the data collector. The radial motion device has the advantages of compact structure, precise positioning, simple operation, precise measurement, automatic data collection and the like, and important and precise data is provided for magnetic field shimming and ion beam flow mechanical calculation.

The invention discloses a superconductive cyclotron extraction region beam measurement detection target head, which comprises a probe target head and a fixation structure. The probe target head is formed by a multi-wire probe, a ceramic block and a connecting rod. One end of each tungsten wire passes through a through hole in the ceramic block and extends into the connecting rod; each tungsten wire is fixedly arranged in the ceramic block through welding; and the ceramic block is fixedly arranged in one end of the connecting rod through welding. The fixation structure comprises an aluminum alloy connecting piece and a drive rod. The connecting rod and the drive rod are connected through the aluminum alloy connecting piece. The detection target head can carry out measurement based on intensity of electrical signals on different wires and through a point motion mode of the drive rod to obtain axial and radial position information of the beam, so that beam debugging can be carried out, and stable and effective operation of an accelerator is realized; and the detection target head has the advantages of high resolution, high precision, simple measurement and capable of replacing the probe without opening the cavity.

The invention discloses a novel superconducting cyclotron tuning system. An analog IQ (in-phase and quadrature) phase detection module is used for modulating sine I and cosine Q of phase differences of LO (local oscillation) and RF (radio frequency) signals, and the modulated signals are used as input signals for an analog IQ phase detection calibration module; the analog IQ phase detection calibration module is used for calibrating measurement errors of the analog IQ phase detection module and provides real-time detection for the analog IQ phase detection module; after completing calibration,the analog IQ phase detection module is automatically turned off, and the influence of the analog IQ phase detection calibration module on analog IQ phase detection results is avoided. The combination technique of an analog signal processing system and a digital signal system is used herein, providing improved tuning precision and noise tolerance for the system and reduced time delay for a feedback system that is caused by signal processing; the analog IQ phase detection calibration module in the system of the invention provides improved self-adjusting capacity and extended applicable range for the analog IQ phase detection module.

The invention discloses a pencil beam intensity-modulated treatment head system and a realization method thereof. The system comprises a superconducting cyclotron, an energy selecting system, a beam spot adjusting device, deflecting dipolar iron and a treatment head. The superconducting cyclotron inputs a proton beam with fixed energy and adjusts flow strength of the proton beam. The energy selecting system performs adjustment on the proton beam with the fixed energy for obtaining energy and energy dispersion for treating a tumor, and furthermore realizes vertical range adjustment of the proton beam in the tumor. The proton beam arrives at the beam spot adjusting device and dimension of the cross section of the proton beam is adjusted. The proton beam arrives at the treatment head through the deflecting dipolar iron, and lateral extension is performed on the proton beam. According to the system and the method, the proton beam passes through the treatment head, thereby reducing secondary radiation caused by nuclear collision, improving utilization rate of the proton beam in a transmission process and realizing relatively large dimension of an irradiation field. Three-dimensional intensity-modulated treatment on the whole area of the tumor can be realized through a cooperatively controlled scanning magnet, an energy selecting system and the superconducting cyclotron.

The invention discloses an adjusting device for a superconductive circular accelerator lead-out zone magnet channel. The adjusting device comprises a first adjusting mechanism, a second adjusting mechanism and a separation seal box, wherein each of the first adjusting mechanism and the second adjusting mechanism comprises a first outer tube, a second outer tube and a third outer tube; a screw rod is arranged in each of the second outer tubes of the first adjusting mechanism and the second adjusting mechanism, and one end of each screw rod is connected with a mobile flange via a ball bearing while the other end drives the first outer tubes of the first adjusting mechanism and the second adjusting mechanism to move forward in a rotating manner; one end of each of the third outer tubes of the first adjusting mechanism and the second adjusting mechanism is welded in the separation seal box, a drive rod is arranged in each third outer tube, one end of each drive rod is connected with a push rod in a screwed manner, and the mobile flange is connected with the push rod in a welded manner. Via the adjusting device disclosed in the invention, safe and reliable seal of the accelerator can be ensured while vacuum environment of the accelerator is not damaged, the adjusting device is simple in structure, requirements for adjusting precision can be met without complex motor drive, and low cost and high reliability can be realized.

The invention relates to a Y-structure inner rod spiral chamber of a superconducting cyclotron, wherein the Y-structure inner rod spiral chamber belongs to the researching field of a cyclotron. According to the cyclotron, through combining a single-inner-rod-structure spiral chamber with a double-inner-rod-structure spiral chamber, a new Y-structure inner rod spiral chamber model is formed, wherein one end of a front branch rod and one end of a back branch rod are connected with an acceleration plate electrode, and the other end of the front branch rod and the other end of the back branch rod are connected with a central single inner rod, wherein the front branch rod and the back branch rod have different radiuses and different lengths. According to the Y-structure inner rod spiral chamber provide by the invention, large-range adjustment for chamber resonance frequency and voltage distribution can be realized through adjusting the height of a central single inner rod and positions of the central single inner rod and the two branch rods, and fine adjustment on the chamber resonance chamber is finished through changing distance between a fine-turning capacitor and top end of a chamber housing. The Y-structure inner rod spiral chamber of the superconducting cyclotron has advantages of effectively settling a problem of defects of a chamber acceleration voltage distribution voltage, increasing average acceleration voltage of particles and facilitating leading-out of particles from the superconducting cyclotron.

The invention discloses a medical superconducting cyclotron resonant cavity capacitor tuning device and method. The device comprises a cavity and two sets of DEE plates arranged end to end in the cavity. Upper and lower sides of each set of DEE plates are respectively vertically connected with an inner rod. A tuning structure which moves relative to an end face of each Dee plate is arranged in the cavity. The tuning structure consists of a tuning capacitor plate and a moving rod. The tuning method comprises the steps that a vector network analyzer is used to adjust the resonant frequency; the reflection coefficient S11 is measured; the frequency point f1 corresponding to the minimum S11 is observed; f1 and the resonant frequency f0 are compared; if f1 is greater than f0, the capacitor plate is slowly moved to the left, otherwise the capacitor plate is slowly moved to the right; the change of the frequency point corresponding to the minimum S11 is observed; and if f1 is equal to f0, the moving of the capacitor plate is stopped to reach the frequency point of the working resonant cavity. According to the invention, automatically cavity frequency adjusting is realized; and the equivalent capacitance of a resonant circuit is changed by automatically controlling the capacitor plate to move to the right and left and tune the resonant cavity.

The invention relates to an imbalanced dual-inner-rod spiral high-frequency resonant cavity of a superconductive cyclotron, and belongs to the research field of the cyclotron. The imbalanced dual-inner-rod spiral high-frequency resonant cavity comprises a) an asymmetrical spiral accelerating electrode; b) accelerating gaps with asymmetrical angular widths on the two sides of the electrode; c) two inner conductors having different diameters and lengths and connected with the accelerating electrode; d) an asymmetrical spiral cavity shell; and e) fine-tuning capacitors on the top and bottom of the cavity. The high-frequency cavity structure provided by the invention can realize large-scale regulation of the cavity resonant frequency and voltage distribution by adjusting the heights and positions of the two inner rods, and the above-mentioned parameters can be subjected to fine tuning by changing the angular widths of the accelerating gap between the accelerating electrode and the spiral shell. By adoption of the imbalanced dual-inner-rod spiral high-frequency resonant cavity for satisfying the requirement of the high-frequency system cavity of the superconductive cyclotron, the voltage in the concave position of a voltage distribution curve of the high-frequency cavity is effectively improved; the overall voltage distribution of the cavity is improved; and the eduction of accelerating particles from the cyclotron can be facilitated.

The invention relates to a dual-drive four-resonant-cavity high-frequency D circuit, and the high-frequency D circuit comprises three parts: a dual high-frequency emitter system, a four high-frequency resonant cavity system, and a single low-level system. Two 100kW high-frequency emitters drive two groups of cavities I and R. Each group of high-frequency cavities comprise two double acceleration gap resonance D boxes which are connected with each other in a central region through a conductor. The low-level system comprises a cavity resonance loop, an I-cavity voltage amplitude control loop, an R-cavity voltage balancing loop, a remote control circuit and a fine tuning capacitor control loop. The D circuit provided by the invention can improve the acceleration phase precision of a high-frequency system of a medical superconductive circular accelerator, can effectively avoid a problem of upper and lower frequency mixing caused by the mutual coupling capacitance of two groups of cavities, is easier to stable the acceleration voltages and resonance frequencies of the two groups of cavities, and can effectively improve the reliability of speeding-up ions of a high-frequency system.

The invention discloses a full superconducting proton therapy system comprising a superconducting cyclotron, wherein the superconducting cyclotron is used for generating proton beam; A superconduct rotary treatment chamber is arrange beside that superconducting cyclotron; The superconducting rotary treatment chamber includes a beam line of the rotary treatment chamber. The above technical scheme is adopt, The proton therapy system, using the mode of superconducting cyclotron equipped with superconducting rotating treatment chamber, As that system is compact in layout and small in occupy space,the weight of the equipment is greatly reduced, thereby further reduce the manufacturing cost, namely, the invention provides a scheme of a fully superconducting proton therapy system for reducing the size, weight and the manufacturing cost of the proton therapy equipment.

The invention belongs to the technical field of superconducting cyclotrons, and in particular relates to a magnetic field measuring device for the first harmonic of a superconducting coil and a measuring method thereof. The magnetic field measurement device is used for the first harmonic magnetic field measurement of the superconducting coil of the superconducting cyclotron. and the measuring part, the lower radial and axial driving part, the positioning and measuring part is provided with a magnetic measuring Hall piece, and the positioning and measuring part can be in the circumferential driving part and the radial and axial Driven by the driving part, the magnetic measuring Hall plate completes the measurement of the radial magnetic field distribution and the axial magnetic field distribution of the superconducting coil. The magnetic field measurement device for the first harmonic of the superconducting coil provided by the present invention has the advantages of convenient operation, fast measurement speed, low cost, etc., and can meet the precision requirements for magnetic field performance analysis of the superconducting coil.

The invention belongs to the field of superconducting circular accelerators, and provides a cooling method for a superconducting magnet of a superconducting circular accelerator in order to solve the problems that in China, the existing cooling methods for superconducting magnets are complex in procedure and large in time consumption for cooling and the like. The cooling method includes the steps of (1) vacuumizing the superconducting magnet; (2) conducting liquid nitrogen refrigeration on the superconducting magnet, and meanwhile adjusting length of a pulling rod of the superconducting magnet in a radial direction; (3) exhausting liquid nitrogen and vacuumizing the superconducting magnet; (4) conducting liquid helium refrigeration on the superconducting magnet to complete cooling. The cooling method for the superconducting magnet of the superconducting circular accelerator adopts a two-segment cooling mode including a liquid nitrogen cooling process and a liquid helium cooling process; the cooling procedures are designed reasonably, the cooling time is short, the operation is convenient, and the cooling method can effectively reduce consumption amount of the liquid nitrogen and the liquid helium on the premise of meeting the cooling demands for superconducting coils.

The invention discloses a compact single-chamber proton therapy system which comprises a superconducting cyclotron system, an energy-reducing device system, a beam-flow conveying system, a scanning treating head system, a patient support system and a treatment plant; the superconducting cyclotron system generates fixed energy and proton beam flows in a certain flow intensity range, the proton energy is continuously adjustable in the range of 70-200MeV via the energy-reducing device system, the beam-flow conveying system guides the proton beam flows from the energy-reducing device system to thescanning treating head system; the scanning treatment head system is used for implementing a scanning scheme according to the treatment plan, adjusts the transverse position of the proton beam flows,and realizes the two-dimensional scanning of the beam flows. The patient support system supports, fixes and positions the patient, and cooperates with the superconducting cyclotron system, the energy-reducing device system, the beam-flow conveying system and a scanning treatment head system for realizing three-dimensional conformal and dose-modulated proton therapy. The device is good in innovation, high in practicability and compact in structure, and the construction site and cost of the proton therapy system can be reduced while the treatment effect is guaranteed.

The invention belongs to the technical field of superconducting cyclotrons, and particularly relates to a superconducting coil for the superconducting cyclotron and a winding impregnation method of the superconducting coil. The superconducting coil for the superconducting cyclotron comprises a cylindrical coil skeleton on which a thick superconducting coil is wound, wherein the thick superconducting coil is formed by winding superconducting wires; a coil skeleton end plate is arranged at one end of the coil skeleton; a plurality of diversion trenches are arranged in the coil skeleton end plate; and epoxy resin is impregnated on the superconducting wires. By the superconducting coil and the winding impregnation method thereof, gaps between the superconducting wires wound into the thick superconducting coil can be completely filled with the epoxy resin, so that a ''quench'' phenomenon of the superconducting coil due to the gaps between the superconducting wires is avoided.

The invention belongs to the technical field of superconducting cyclotrons and particularly relates to a suspension system and method for adjusting first harmonic of magnetic field of a superconducting cyclotron. Wherein the suspension system is used for adjusting first harmonic of the magnetic field of a superconducting coil and is arranged on a circular low-temperature thermostat of the cyclotron, and the superconducting oil is disposed in the low-temperature thermostat and includes a plurality of upper pull rods arranged on an upper end surface of the low-temperature thermostat, a plurality of lower pull rods arranged on the lower end surface of the low-temperature thermostat and a plurality of cross pull rods arranged on the side of the low-temperature thermostat, the position of the superconducting coil can be adjusted by adjusting tensile force of the upper pull rods, lower pull rods and cross pull rods, positional adjustment includes Bz-direction and Br-direction adjustment for the superconducting coil, and the Bz-direction refers to the axial direction of the low-temperature thermostat, and the Br direction refers to the radial direction of the low-temperature thermostat. The suspension system provided herein is simple in structure and has the advantages of good operational convenience and low manufacture cost.

The invention discloses a quench protection device for a superconducting magnet system. The quench protection device comprises a superconducting coil group, the superconducting coil group comprises two symmetrical superconducting coils, the two superconducting coils are all connected in parallel with protection diodes, the superconducting coils and the protection diodes are all connected to a power supply through conductive wires, the superconducting coil group is connected in parallel with a quench protection unit, a transfer switch is installed in a connecting loop of the superconducting coils, the protection diodes and the power supply, and the transfer switch is connected with an external resistor through conductive wires. The quench protection device controls the transfer switch to connect the superconducting coils with the external resistor when the superconducting coils are in the state of quench of superconductivity, thereby effectively and quickly achieving the quench protection for the superconducting coils. Meanwhile, the problem of superconducting coil damage caused by response delay of the quench protection unit is solved by means of a method using the superconductingcoils and the protection diodes connected in parallel, two protection modes are effectively combined, the probability of damage to superconducting excitation coils of a superconducting cyclotron in the state of quench of superconductivity is greatly reduced, and the quench protection device has good use and promotion value.

The invention discloses a high-intensity magnetic field and high-frequency field coupled test method and a superconducting cyclotron based on the method, which are used in the technical field of measurement of electromagnetic field characteristics and electric field distribution of a high-current proton cyclotron. The method comprise the following steps of: carrying out matching setting test on overall parameters of a high-intensity magnetic field and a high-frequency field; balancing matching setting test of high-frequency voltage symmetry and axial focusing; carrying out matching setting test between a magnetic field and high-frequency system and the working path; carrying out matching setting test between an ion source and a central area high-frequency cavity; and carrying out matchingsetting test between the central area high-frequency cavity and a main magnet core column. The cyclotron is a miniaturized high-dose medium-energy superconducting cyclotron, and comprises a matching structure between a superconducting strong magnetic field system and the high-frequency system, a matching structure between a main vacuum system and the ion source and a matching structure between thesuperconducting strong magnetic field system and the high-frequency system, and a beam matching structure in the whole process from the ion source to a central region to an acceleration region to a leading-out region. According to the invention, the cooperation technology of each link is adopted, and the new problems of miniaturization and high dosage are solved from the overall effect.

The invention belongs to the technical field of a superconducting cyclotron, and specifically relates to a sealing structure of a cryostat for the superconducting cyclotron. The cryostat comprises an annular sealing cabin which is used for placing superconducting coils, wherein the annular sealing cabin comprises an inner cylinder body, an outer cylinder body, an upper flange and a lower flange; the cryostat also comprises a suspension system upper supporting cylinder and a suspension system lower supporting cylinder which are placed on the upper flange and the lower flange, and an electrostatic deflecting plate extraction electrode supporting cylinder, a beam extraction system supporting cylinder, a radial beam detection target supporting cylinder and a suspension system transverse supporting cylinder which are arranged on the outer cylinder body; and the sealing structure comprises a sealing structure between the upper flange and the lower flange, and the inner cylinder body and the outer cylinder body. The sealing structure can be detached and overhauled, is stable in the sealing effect, and capable of ensuring that the superconducting coils can be adjusted and positioned in a vacuum environment.

The invention belongs to the technical field of superconducting cyclotrons and particularly relates to a magnetic field measuring device for positioning the position of a superconducting coil. The magnetic field measuring device is used for magnetic field measurement of the superconducting coil of a superconducting cyclotron; the superconducting coil is arranged in a circular cryostat; the magnetic field measuring device comprises a supporting arm which can be arranged on the diameter of a circular hollow position of the circular cryostat, adjustable supporting rods arranged at two ends of the supporting arm, and a measuring arm which is arranged below the supporting arm and is provided with a magnetism measuring Hall piece fixing block; the adjustable supporting rods are used for adjusting the measuring arm to a central plane of the superconducting coil; the supporting arm is used for driving the measuring arm to do axial rotation in the circular hollow position of the cryostat; a magnetism measuring Hall piece which can be used for measuring the intensity of a magnetic field is arranged in the magnetism measuring Hall piece fixing block; the magnetism measuring Hall piece can be used for measuring radial magnetic field distribution of the superconducting coil in the cryostat along with the rotation of the measuring arm. The magnetic field measuring device has the advantages of simple structure, convenience in operation and low cost.

The invention discloses a superconducting cyclotron for producing radioisotopes. The superconducting cyclotron comprises a cyclotron housing and a vacuumizing device; a vacuum chamber is formed in the cyclotron housing, and communicates with the vacuumizing device; a target system, a D-shaped box and two groups of magnetic units respectively arranged at the top and the bottom of the vacuum chamber are arranged in the vacuum chamber; the target system and the D-shaped box are respectively positioned between the two groups of magnetic units; the target system is arranged at the outer side edge of the D-shaped box; the D-shaped box is connected with an ion introducing device; and a proton capturing and exporting device is arranged on the side wall of the cyclotron housing. The superconducting cyclotron provided by the invention is small in occupied space, so that the size of the cyclotron can be reduced, and meanwhile, the production efficiency of the cyclotron is improved. Due to the use of superconducting magnets, a radiation space is reduced, so that the use amount of a shielding material is greatly reduced, thereby significantly reducing the production cost and the operation cost.

The invention discloses a mini penning ion source, and relates to the field of superconductive cyclotrons. The mini penning ion source comprises a casing, an anode cylinder is arranged in the casing,cathodes are arranged in the casing and positioned in the two ends of the casing respectively, the anode cylinder is positioned between the cathodes, each cathode is provided with an insulating part,each insulating part comprises a first insulating block arranged on the cathode and insulated from the casing, a second insulation block arranged on the first insulating block and insulated from the anode cylinder, and a third insulating block arranged on the first insulating block and insulated from the casing, hydrogen channels are formed in the two ends of the anode cylinder respectively, lead-out slits are formed in the sides far from the hydrogen channels of the anode cylinder respectively, and the casing is provided with a gas transmission channel communicated with the hydrogen channels.The ion source tends not to influence generation of plasma.