55 results about "Heavy ion beam" patented technology

The invention discloses a movable low-temperature collimator. The movable low-temperature collimator comprises an outer Dewar; the cold shield is mounted in the outer Dewar; the low-temperature vacuum cavity is installed in the cold shield, and the cold shield is used for shielding heat radiation of the outer Dewar to the low-temperature vacuum cavity; the heat insulation corrugated pipe cavity is installed in the outer Dewar, one end of the heat insulation corrugated pipe cavity penetrates through the end of the outer Dewar and then is connected with the normal-temperature vacuum pump chamber assembly, the other end of the heat insulation corrugated pipe cavity is connected with the low-temperature vacuum cavity, and the heat insulation corrugated pipe cavity is used for reducing heat conduction of the normal-temperature vacuum pump chamber assembly to the low-temperature vacuum cavity; the collimator target head is fixed through the outer Dewar and installed in the low-temperature vacuum cavity, and the collimator target head can move in the radial direction of the low-temperature vacuum cavity and absorb the high-energy ions so as to maintain the high vacuum degree of the low-temperature vacuum cavity. The device can be used for inhibiting the dynamic vacuum effect of a high-current heavy ion beam in a heavy ion superconducting synchronous ring, and the phenomena of ion loss, magnet quenching and vacuum degree avalanche caused by the dynamic vacuum effect are avoided.

The present invention discloses a Bragg peak broadening method for a point scanning proton or heavy ion beam and a radiotherapy system. The Bragg peak broadening method is characterized in that a porous material is placed on the path of the point scanning proton or heavy ion beam, the porous material is perpendicular to the beam travel direction, and the point scanning proton or heavy ion beam generates energy stratification (Energy Straggling) after passing through the porous material, thereby broadening the Bragg peak of the proton or heavy ion beam. This method can broaden the Bragg peak of the proton or heavy ion beam, can reduce the number of energy layers required for proton or heavy ion treatment, and thus can improve the treatment efficiency of the point scanning proton or heavy ion equipment.

The invention discloses a method for obtaining leymus chinensis mutants by using heavy ion beams to irradiate seed calluses, relates to the technical field of leymus chinensis breeding biology, and solves the three-low problems of low heading rate, low maturing rate and low germination rate of leymus chinensis seeds. After the leymus chinensis callus is subjected to induction culture, selecting faint yellow granular callus obtained by induction culture, and transferring the faint yellow granular callus into a culture dish filled with an induction culture medium for subculture; carrying out irradiation treatment by using a 5Gy carbon ion beam, transferring the callus subjected to irradiation treatment into a sterile culture bottle filled with a differential culture medium, and culturing to obtain adventitious buds; cutting off callus adhered to the base under a sterile condition, and inserting into a rooting culture medium for rooting culture after a rooting point is exposed; and after obvious root systems grow out, carrying out potting culture to obtain the leymus chinensis mutant. According to the invention, new genetic variation can be created, early in-vitro selection is realized, more effective mutants are obtained as new germplasm resources of leymus chinensis, and the breeding process of leymus chinensis is accelerated.

The present invention relates to a synchrotron fast-response magnetic alloy high-frequency system, comprising: a control circuit for generating a waveform signal; a full-solid-state power source for receiving the waveform signal and performing power synthesis to generate a power signal; an impedance phase compensator for realizing impedance rise and fall and phase compensation; an impedance transformer for realizing impedance transformation to achieve impedance matching between the full-solid-state power source and the magnetic alloy-loaded resonant cavity; a magnetic alloy-loaded resonant cavity for receiving the power signal and generating a radio frequency signal to operate on the heavy ion beam; and a sampling circuit for sampling the radio frequency signal and feeding it back to the control circuit. The synchrotron fast-response magnetic alloy high-frequency system provided by the technical solution of the present invention has performance indicators of low frequency, high bandwidth, fast rising of voltage signal and response, and can output single-sine and half-sine waveforms, realizing the functions of capturing, accelerating and Barrier Bucket bunch accumulation for various heavy ion beams.

The invention discloses a lactococcus lactis strain with high nisin yield and application, and belongs to the technical field of industrial microorganisms. According to the invention, a nisin-tolerant nisin high-producing strain (Lactococcus lactis MN6) is successfully bred on the basis of compound mutation of ethyl methane sulfonate and heavy ion beam and in combination with nisin resistance screening, the strain can tolerate a fermentation environment with the nisin concentration of 6000 IU. ML <-1 >, the nisin yield through shake flask horizontal fermentation can reach 10776 IU. ML <-1 >, which is 9.76 times of the shake flask fermentation yield of original bacteria, the strain has good passage stability, and the strain can be used for producing a high-yield strain of nisin. The method is more suitable for industrial production.

The invention provides a one-dimensional nano material with wave-absorbing performance as well as a preparation method and application of the one-dimensional nano material. The preparation method comprises the following steps: (1) sequentially carrying out heavy ion beam irradiation, ultraviolet light sensitization and chemical etching on a high polymer material template to obtain an etched template; (2) spraying metal on one side of the etching template to form a gold layer; and (3) electrochemical deposition is conducted on the side, not sprayed with metal, of the etching template obtained in the step (2), deposition liquid adopted in the electrochemical deposition is an aqueous solution containing TiF4 and CoCl2, and therefore the Co / TiO2 composite nanowire is generated. Through the preparation method, the Co / TiO2 composite wave-absorbing material which is arranged in parallel, high in impedance matching capability and excellent in microwave absorption performance can be obtained.

The invention provides a multi-chamber single-treatment-head proton heavy ion treatment system capable of performing multi-angle treatment, which comprises a proton / heavy ion accelerator, a proton / heavy ion beam transport system, a rotary switching rack, a treatment head and a multi-treatment-room structure, and is characterized in that the proton / heavy ion accelerator, the proton / heavy ion beam transport system and the treatment head are sequentially connected together; the proton / heavy ion beam transport system is fixed in the rotary switching rack, and the treatment head is fixed on one side of the outer part of the rotary switching rack; the rotary switching rack is located in the center of the multi-treatment-room structure and surrounded by the multiple treatment rooms. According to the invention, the tubular rotary switching rack is utilized to convey proton / heavy ion beams deflected by 90 degrees to different treatment rooms at any angle; one proton / heavy ion accelerator is matched with a plurality of treatment rooms, only one set of beam transport system is needed, the system is very short and small, the plurality of treatment rooms share one treatment head, and the whole set of system can provide irradiation treatment at multiple angles of 0-360 degrees.

The invention discloses a saline-alkaline tolerant rice mutation breeding identification and evaluation system based on heavy ion beam radiation, and relates to the technical field of intelligent agriculture, and the system comprises a phenotype dynamic sensing module which is used for carrying out real-time monitoring and abnormity identification on the growth state of rice under saline-alkaline stress so as to identify and output an early abnormal phenotype signal, and determining the abnormal phenotype of plant growth. According to the method, multi-dimensional phenotype data of rice under different saline-alkaline gradients are collected in real time through a multi-source sensor network, the problem of inconsistent growth periods caused by environmental differences is solved by utilizing a dynamic time warping algorithm, a basic identification data set with aligned time sequences is constructed, abnormal phenotype identification is further performed by adopting a local abnormal factor algorithm, and the identification accuracy is improved. Early deterioration early warning of the plant growth state under saline-alkali stress is achieved, the problems of high misjudgment rate and low efficiency in traditional field screening are effectively solved, and reliable data support is provided for early identification of saline-alkali tolerant rice varieties.

This invention belongs to the field of microbial metabolic engineering and synthetic biology, specifically relating to a strain for high-yield... R,R -2,3-Butanediol ( R,R Salt-tolerant Jeju Bacillus DT01 IM3 DLB6 (-2,3-BDO), production strain constructed from this strain and its application in fermentation production. R,R Applications of -2,3-BDO. This invention screens a high-yielding strain through heavy ion beam irradiation mutagenesis. R,R Jeju Bacillus DT01 IM3 DL B6 with -2,3-BDO, preservation number CGMCC No. 37311. This strain exhibits excellent salt tolerance and low endotoxin properties. The production strain constructed from it has extremely high product synthesis capabilities, enabling high-concentration, high-intensity industrial fermentation production.

The present invention relates to a method for preparing magnetic nickel tapered nanowires, comprising the following steps: (1) irradiating and sensitizing a polymer template with a latent track by a fast heavy ion beam; (2) sputtering a gold conductive layer on one side of the polymer template with the latent track, and then depositing a copper conductive layer on the surface of the gold conductive layer by electrochemical deposition; (3) etching the side of the polymer template with the latent track without the gold-copper conductive layer using an etching solution to obtain a polymer template with tapered linear channels; (4) electrochemically depositing magnetic nickel tapered nanowires on the side of the polymer template with the tapered linear channels without the gold-copper conductive layer; and (5) stripping the gold-copper conductive layer to obtain the magnetic nickel tapered nanowires. The present invention is simple and efficient, and for the first time achieves the controllable preparation of magnetic nickel tapered nanowire arrays, successfully preparing small-sized magnetic nickel tapered nanowire arrays with excellent microwave absorption performance.

The invention relates to the technical field of plant breeding, and particularly provides a method for increasing the content of active ingredients with edible value in radix achyranthis bidentatae. By accurately regulating and controlling the irradiation dose of the heavy ion beam, the content of core active ingredients such as photosynthetic pigments, soluble sugar, total flavonoids and total polysaccharides in the radix achyranthis bidentatae is remarkably increased, the quality of the radix achyranthis bidentatae is effectively improved, and a high-quality raw material is provided for developing high-value-added functional foods and traditional Chinese medicine preparations. According to the method, various antioxidant physiological indexes are comprehensively monitored, so that the mutagenic achyranthes bidentata plants have good growth vigor and stress resistance, and the balance of quality improvement and plant vitality is realized. A new way is provided for resource utilization of the overground stem and leaf parts of the achyranthes bidentata, comprehensive development and utilization of whole-plant resources of the achyranthes bidentata are promoted, resource waste is reduced, and a solid foundation is laid for creating high-yield and high-quality new germplasm of the achyranthes bidentata and promoting modern development of the traditional Chinese medicine industry.

The invention provides an ion irradiation method for improving the performance of a copper-based superconducting strip, and belongs to the technical field of ion irradiation. The ion irradiation method comprises the following steps: carrying out ion irradiation on the copper-based superconducting tape by adopting an ion beam under a vacuum condition; the ion beam comprises a light ion beam or a heavy ion beam. By accurately controlling the energy, dosage and current intensity of the ion beam, effective modification of the copper-based superconducting strip is realized, the current-carrying performance of the 2G-HTS strip under high temperature and high field is remarkably improved, and the critical current density Jc is improved by 2.1-5 times. In addition, modification can be carried out according to the specific requirements of the copper-based superconducting strip, and then the consistency and stability of the modification effect are improved.

The utility model relates to a kind of multi-axle heavy ion microporous membrane full-automatic irradiation device, including the following components of split design: roll membrane discharger, including several roll membrane discharging assemblies, several roll membrane discharging assemblies are arranged into several columns side by side;Roll membrane collector, including several roll membrane collecting assemblies, several roll membrane collecting assemblies are arranged into several columns side by side, the column number of several roll membrane collecting assemblies arrangement is same with the column number of several roll membrane discharging assemblies arrangement, roll membrane discharger and roll membrane collector between it is provided with link shaft, steering shaft, transmission shaft, for connecting roll membrane;Heavy ion beam vacuum cavity, between roll membrane discharger and roll membrane collector, for irradiation through the roll membrane of link shaft;Robot, respectively in the material inlet end of roll membrane discharger and the material outlet end of roll membrane collector. Full-automatic feeding and discharging can be realized, multi-angle beam current detection and beam current follow-up are realized, automatic material collecting and rectifying function is realized, and beam irradiation window realizes the automatic adjustment of temperature control.

The present invention belongs to the technical field of ion beam flow measurement, and specifically relates to a measurement and monitoring device suitable for a large range of heavy ion beam flows, comprising an irradiation target chamber (1) with an entrance port (6) at one end, a sample moving platform (2) provided in the irradiation target chamber (1), a measurement detector provided on the sample moving platform (2), and the measurement detector used to measure the fluence rate of the heavy ion beam flow entering from the entrance port (6), and a collimator provided on the entrance port (6). The present invention can accurately measure the fluence rate at different height positions before device irradiation, thereby ensuring the accuracy of irradiation data; it can also accurately monitor the total fluence irradiated to the device surface during the device irradiation process without affecting the device irradiation experimental research, thereby providing basic data for the radiation resistance research of space-borne electronic components.

The invention discloses a three-beam ion irradiation device for simulating research and development of a novel nuclear reactor material, and the device comprises an accelerator which is used for generating a heavy ion beam line; the hydrogen ion implanter is used for generating hydrogen ion beams; the helium ion implanter is used for generating helium ion beams; the irradiation target chamber is used for receiving beam lines generated by the accelerator, the hydrogen ion implanter and the helium ion implanter; the hydrogen ion beam line and the helium ion beam line are located on the two sides of the heavy ion beam line respectively. According to the three-beam ion irradiation device for simulating the research and development of the novel nuclear reactor material, disclosed by the invention, the deviation of the material between the actual conditions of a simulation experiment and a reactor is reduced, and the influence of neutral particles in a simulation experiment irradiation target chamber on the simulation experiment is reduced, so that the detection of the simulation experiment is more accurate.

The present invention provides a radiation light collection system for the interaction between a high-energy heavy ion beam and a target, which is suitable for operation in a strong magnetic field environment; it includes a sleeve, an end bracket, a light-collecting bracket, a sample bracket and a sliding rod; the end bracket has an annular structure and is provided with an opening for the ion beam to pass through; the light-collecting bracket includes a bracket body and a coupling head fixing cylinder; the bracket body is provided with a first through hole and a mounting hole arranged around the first through hole, and the coupling head fixing cylinder is installed in the mounting hole; the coupling head fixing cylinder is provided with an oblique hole for installing an optical fiber coupling head; the sample bracket is provided with a mounting position for placing a sample; the sliding rod connects the end bracket, the light-collecting bracket and the sample bracket together. The radiation light collection system, on the one hand, increases the collection efficiency of the light emitted from the target area and improves the signal-to-noise ratio; on the other hand, mutual detection and correction of signals can be achieved between multiple beam paths. The present invention also provides an assembly method for the radiation light collection system.

This application provides a method and electronic device for determining the attribute information of a heavy ion beam compensator. The compensator is used to adjust the deviation of the heavy ion beam's range when entering a biological object. The method includes: acquiring image information of the biological object, wherein the image information includes a first region and a second region, the first region being a region inside the biological object in an abnormal state, and the second region being a region inside the biological object in a normal state, the second region being located within the surrounding area of ​​the first region; determining first state information of the first region, second state information of the second region, and determining a target energy value of the heavy ion beam based on the image information, wherein the target energy value is used to ensure that the heavy ion beam successfully reaches the first region; and determining the attribute information of the compensator based on the target energy value, the first state information, and the second state information. This application solves the technical problem of the inability to effectively determine the attribute information of the compensator.

The invention relates to the technical field of microorganisms, and particularly discloses bacillus coagulans 18 and application thereof in fermentation production of L-lactic acid. According to the invention, heavy ion beam mutagenesis is combined with high-temperature adaptive evolution breeding to obtain the high-temperature-resistant bacillus coagulans, specifically bacillus coagulans 18, and the preservation number of the bacillus coagulans 18 is CGMCC (China General Microbiological Culture Collection Center) No. 33049. The high-temperature resistance of the strain is remarkably improved, efficient production of lactic acid can be achieved at high temperature, particularly, a two-stage heating method process control strategy developed for the strain can remarkably improve the raw material conversion rate of the strain, and the strain is suitable for industrial production of lactic acid, reduces the economic cost of lactic acid biological manufacturing and is suitable for application and popularization.

The application provides one-dimensional nanometer material with wave-absorbing performance and a preparation method and application thereof. The preparation method comprises the following steps: (1) a polymer material template is subjected to heavy ion beam irradiation, ultraviolet photosensitization and chemical etching in sequence to obtain an etching template; (2) gold is sprayed on one side of the etching template to form a gold layer; and (3) electrochemical deposition is carried out on the side of the etching template obtained in the step (2) which is not sprayed with gold, wherein a deposition solution used in the electrochemical deposition is an aqueous solution containing TiF4 and CoCl2, so as to generate Co / TiO2 composite nanowires. Through the preparation method, the Co / TiO2 composite wave-absorbing material with parallel arrangement, high impedance matching capability and excellent microwave absorption performance can be obtained.

The present invention discloses a movable low-temperature collimator, comprising: an outer dewar; a cold shield, installed in the outer dewar; a low-temperature vacuum cavity, installed in the cold shield, the cold shield is used to shield the heat radiation of the outer dewar to the low-temperature vacuum cavity; a heat-insulating bellows cavity, installed in the outer dewar, and one end of the heat-insulating bellows cavity is connected to the normal temperature vacuum pump chamber assembly after passing through the end of the outer dewar, and the other end of the heat-insulating bellows cavity is connected to the low-temperature vacuum cavity, and the heat-insulating bellows cavity is used to reduce the heat conduction of the normal temperature vacuum pump chamber assembly to the low-temperature vacuum cavity; a collimator target head, fixed by the outer dewar and installed in the low-temperature vacuum cavity, the collimator target head can move radially along the low-temperature vacuum cavity and absorb high-energy ions to maintain the high vacuum degree of the low-temperature vacuum cavity. The present invention can be used to suppress the dynamic vacuum effect of a high-current heavy ion beam in a heavy ion superconducting synchronous ring, avoid ion loss caused by the dynamic vacuum effect, and cause magnet quench and vacuum avalanche.

The present invention relates to a readout electronics circuit system for a heavy ion beam telescope and a method of using the same. The system includes a front-end readout control module, a data aggregation module, a trigger and clock module, and a computer. The front-end readout control module is used to receive the control signal from the data aggregation module and the clock and trigger signals provided by the trigger and clock module, and amplify and digitize the voltage pulse signals output by the corresponding silicon pixel chips in the heavy ion beam telescope to obtain processed data frames. The data aggregation module is used to aggregate and process the data frames processed by several front-end readout control modules to determine the track of the particle. The trigger and clock module is used to generate multiple trigger signals and multiple clock signals. The computer is used to control the front-end readout control module, the data aggregation module, and the trigger and clock module. The present invention can be widely applied to the fields of high-energy physics experiments and nuclear detection technologies.

To provide a method for efficiently producing nutritional stress tolerant mutants by inducing targeted mutations in plant nutrition.SOLUTION: According to the present invention, there is provided a method for producing a nutritional stress tolerant mutant, which comprises irradiating a plant with a heavy ion beam and, after the irradiation, cultivating the plant under nutritional stress conditions.SELECTED DRAWING: Figure 1

The invention discloses a high-charge heavy-ion high-energy-intensity laser. A high-intensity single-charge heavy-ion beam is obtained by transversely colliding a single-charge heavy-ion beam injection section with a low-speed multi-surface side-by-side correlation surface electron flow containing an unionized atom return channel; a high-intensity single-charge heavy ion beam is converted into a high-intensity high-charge heavy ion beam with the ionization degree of mu by adopting a flat runway-shaped high-speed multi-surface side-by-side correlation surface electron flow transverse collision high-charge heavy ion ionization ring with two high-charge ionization regions; high-charge heavy ion high-energy laser and heavy ion beam emission is realized by adopting a flat runway-shaped high-speed multi-surface side-by-side correlation surface electron flow to transversely collide with a high-charge heavy ion excitation ring. The intensity of surface electron flow, heavy ion beam and laser beam can be greatly improved by adopting the electrified thermionic cathode which is connected in parallel with the high-capacity super capacitor and has the width increased by more than five times. According to different laser wavelengths and powers, various practical purposes can be achieved from obtaining of a high-contrast holographic image of an internal atomic structure of a organism to serving as a novel high-energy strong laser weapon.

The invention relates to a compact superconducting cyclotron for isotope production. The high-current ion beam generator comprises a high-charge-state ECR ion source and a high-current proton source, the high-charge-state ECR ion source generates a milliampere-level high-charge-state heavy ion beam, and the high-current proton source generates a milliampere-level proton beam and a hydrogen molecule ion beam. An inlet of the injection beam line is connected with the high-charge-state ECR ion source and the high-current proton source. And a low-energy high-current ion mixed beam generated by the high-current ion beam generator is transmitted to the accelerator through the injection beam line. And the accelerator is connected with two symmetrical lead-out beam lines through a lead-out channel of the accelerator, and the two lead-out beam lines are positioned on the two sides of the accelerator so as to lead out a high-energy strong-current heavy ion beam and a high-energy strong-current proton beam. The advantages of the heavy ion beam and the proton beam are considered, and the medical TAT isotope is produced more efficiently and safely.

The present invention relates to a compact ion implanter and an ion implantation method for tumor treatment, wherein the compact ion implanter comprises an ion source, a radio frequency quadrupole field accelerator and an ion transport pipeline, wherein the ion source and the radio frequency quadrupole field accelerator are respectively arranged at two ends of the ion transport pipeline; a pre-buncher is arranged on the ion transport pipeline for longitudinally focusing the ion beam flow along the ion transport pipeline. The compact ion implanter for tumor treatment disclosed by the present invention reduces the volume of the medical accelerator, reduces the manufacturing cost of the accelerator, fully and efficiently gives play to the advantages and characteristics of the proton beam and the heavy ion beam, and makes the proton therapy and carbon ion therapy more convenient and popular.

The invention provides a method and system for treating tumors by tracing and monitoring protons and heavy ions on line, and belongs to the technical field of radiation tumor treatment.The method comprises the steps that a proton beam or a heavy ion beam is controlled to irradiate a tumor target area of a patient; acquiring signal intensity and spatial distribution information of characteristic X-rays emitted from the body of the patient; acquiring a real-time Bragg peak dose deposition distribution image of the proton beam or the heavy ion beam in the tumor target area according to the signal intensity and the spatial distribution information; acquiring a position deviation and a dose deviation according to the real-time image and a preset treatment plan image; and dynamically adjusting beam parameters of the subsequently emitted proton beam or heavy ion beam according to the position deviation and the dose deviation. According to the invention, by detecting the characteristic signal generated in the treatment process in real time, visualization and closed-loop control of in-vivo dose deposition are realized.

The invention provides a multi-means combined treatment center and an application method. One side of the first multifunctional treatment room is connected with the MR room, the other side of the first multifunctional treatment room is connected with the second multifunctional treatment room, the BNCT double-treatment-room public hall and the CT room are connected, the first multifunctional treatment room, the MR room and the second multifunctional treatment room are provided with embedded hanging rails, the movable CT is connected to the embedded hanging rails in a sliding and hanging mode, and a cross-shaped ground rail is arranged in the first multifunctional treatment room. One end of the cross ground rail extends to the MR chamber to be connected with a fixed MR, and the other end of the cross ground rail extends to the multifunctional treatment chamber II to be connected with a vertical 90-degree proton / heavy ion beam outlet, a horizontal BNCT beam outlet I and a horizontal 45-degree photon / electron beam outlet; one end of a cross ground rail located in the first multifunctional treatment chamber is connected with a vertical 45-degree proton / heavy ion beam outlet and a horizontal photon / electron beam outlet, one end of the cross ground rail extends to the CT chamber, and a treatment bed is connected to the cross ground rail in a sliding mode.

The application provides a kind of sweet sorghum silage special compound microbial inoculant based on heavy ion beam irradiation breeding, and relates to the technical field of microbial breeding and silage feed, which is composed of Lactobacillus citreum mutant strain Lc15 and Pichia anomala mutant strain Pa22, and the inoculation ratio of the two strains in the compound microbial inoculant is 1:1 (volume ratio). The application has the following advantages: high acid production efficiency; the lactic acid production of Lc15 in the compound microbial inoculant is further improved compared with the original strain, the lactic acid production of the compound system is further improved compared with the original strain combination, and the pH value of the silage system can be quickly reduced; good synergistic performance; Pa22 and Lc15 are metabolically synergistic, which moderately increases the acetic acid content while improving the lactic acid production, thereby enhancing the aerobic stability and avoiding affecting the palatability; good genetic stability; the two mutant strains and the compound system have no significant fluctuation in acid production performance after being continuously passed for 9 times, which meets the demand of large-scale application.

The invention relates to a method for preparing a magnetic metal nickel gradually-thinned nanowire, which comprises the following steps of: (1) irradiating and sensitizing a polymer template by using a fast heavy ion beam to obtain a polymer template with a latent track; (2) sputtering a gold conductive layer on one side of the polymer template of the latent track, and depositing a copper conductive layer on the surface of the gold conductive layer by using electrochemical deposition; (3) etching one side, without the gold-copper conductive layer, of the polymer template of the latent track by adopting an etching solution to obtain a polymer template with a gradually-thinned linear pore channel; (4) electrochemically depositing a magnetic metal nickel gradually-thinned nanowire on one side, without the gold-copper conductive layer, of the polymer template with the gradually-thinned linear pore channel; and (5) stripping the gold-copper conductive layer to obtain the magnetic metal nickel gradually-thinned nanowire. The method is simple and efficient, controllable preparation of the magnetic metal nickel gradually-thinned nanowire array is achieved for the first time, and the small-size magnetic metal nickel gradually-thinned nanowire array with excellent microwave absorption performance is successfully prepared.

The present invention relates to a beam position detector for a proton heavy ion synchrotron accelerator and a method of using the detector, comprising: a plate assembly, a vacuum feedthrough assembly, an isolation ground assembly and a vacuum pipe; the plate assembly is fixedly arranged on the inner wall of the vacuum pipe through a support column assembly and separated by the isolation ground assembly; the vacuum feedthrough assembly is arranged on the outer wall of the vacuum pipe, and the vacuum feedthrough assembly is respectively connected to the plate assembly, an amplifier and a corresponding load; two vacuum pump ports are symmetrically provided on both sides of the vacuum pipe, and the two vacuum pump ports are connected to a vacuum pump through a vacuum pump pipe, so that the vacuum pipe maintains a preset vacuum degree; the plate assembly senses the beam to be measured entering from the upstream of the vacuum pipe, and the sensed signal is sent to a subsequent processing device for processing via the vacuum feedthrough assembly and the amplifier. The present invention can be widely used in the field of beam diagnosis of proton heavy ion beam accelerators.