32 results about "Carbon ion beam" patented technology

Normal tissue complications limit curative broadbeam radiotherapy to tumors including lung cancer. Radiation retinitis causing blindness limits quality of life and long term survival for patients with ocular melanoma. This invention pertains to alternative, normal tissue sparing 100 to 1,000 Gy microbeam radiations with least normal tissue complications and concomitant radio-immunotherapy by innate immune response of epidermis and dermis to low dose radiation with 50 kV X-rays. Total body skin radiation with former airport passenger screening machines with 50 kV X-ray is disclosed. Microbeams are generated without contaminating scatter and neutron radiations from collinear gamma ray and electron beam produced by inverse Compton interaction with high energy laser and electron beam and from proton and carbon ion beams in tissue equivalent cylindrical collimators. Extracorporeal immunotherapy and chemotherapy and apheresis of mutated subcellular particles released into circulation in response to cancer-therapies are by clinical continuous flow ultracentrifugation combined chromatography.

Treatment planning methods are provided that determine the variability of relative biological effectiveness (RBE) along a beam line and calculate, among other things, what intensity of hadron beam such as a proton or a carbon ion beam should be applied to achieve a desired biological dose at treatment site of a patient afflicted with a medical condition. Typically, three or four RBE values at three or four corresponding spacially-dispersed intervals along the beam line are calculated. In one embodiment, two RBE values for the spread-out Bragg peak (SOBP) region of the treatment site; one for the proximal section and one for the declining distal section is calculated. A third and different RBE value may be determined for the distal edge region of the SOBP. A fourth value may also be calculated for a pre-SOBP region.

Isotopically-enriched graphene and isotope junctions are epitaxially grown on a catalyst substrate using a focused carbon ion beam technique. The focused carbon ion beam is filtered to pass substantially a single ion species including a single desired carbon isotope. The ion beam and filtering together provide a means to selectively isotopically-enrich the epitaxially-grown graphene from given carbon precursor and to selectively deposit graphene enriched with different carbon isotopes in different regions.

A medical proton heavy ion accelerator comprises ion sources, a low energy injector, a cyclotron and a traveling wave linear accelerator connected in sequence; the ion sources comprise a hydrogen ionsource and a carbon ion source, and can provide hydrogen ions and carbon ions, thus enabling the medical proton heavy ion accelerator to has two radiotherapy modes that include a proton ray mode and aheavy ion ray mode; said two radiotherapy modes are mutually implemented, and can be selected according to real treatment demands; the cyclotron can directly accelerate a hydrogen ion beam or a carbon ion beam from a low energy level to a high energy level, thus providing higher acceleration efficiency and effect; the energy of the proton beam or carbon ion beam emitted by the traveling wave linear accelerator can be adjusted, thus obtaining the proton beam or carbon ion beam of different energy values, satisfying different dosage demands for curing cancers, providing a strong adaptability, and improving the cancer treatment effect.

The invention relates to a carbon-ion-beam superconductive rotary Gantry. The carbon-ion-beam superconductive rotary Gantry comprises a rotary bracket, a vacuum channel, a combined magnet and scanningmagnets, wherein the vacuum channel is formed in the rotary bracket and is used for providing a vacuum environment for transmission of ion beam currents; the combined magnet is arranged on the periphery of the vacuum channel and is used for carrying out direction guiding and envelope control on carbon ion beams; and the scanning magnets are arranged in front of the last magnet entrance of the combined magnet and are used for regulating positions of ion beam spots in an irradiation field plane at the tail end of the rotary Gantry. Compared with a traditional normal-temperature rotary Gantry, the small-sized and light-weight carbon-ion-beam superconductive rotary Gantry provided by the invention has the advantages that a system adopts currently the most forefront thermo-iron superconductingtechnique in the world, and the volumes and weights of all magnets are substantially reduced except the scanning magnets.

The invention, which belongs to the field of radiotherapy and radiation detection, discloses a carbon ion range/energy measurement method and device, thereby realizing real-time, in-vivo and non-invasive carbon ion range/energy measurement. With the disclosed method and device, the range uncertainty in the process of carbon ion radiotherapy can be reduced; and the method and device are mainly applied to application occasions needing acquisition of the range/energy of the carbon ion beam in the object. The method comprises: acquiring a prompt gamma energy spectrum generated in the carbon ion treatment process by a measuring device; quantifying a Doppler offset peak position of the characteristic gamma in the energy spectrum; and carrying out calculation based on a numerical algorithm to obtain carbon ion energy and a range. Besides, the device includes a single-slit collimator, a main detector, an active shielding device, a signal amplifying device, a multi-channel data registration andcollecting module, and a computer processing unit. Compared with the traditional method, the carbon ion range/energy measurement method and device have advantages of a non-invasive mode, real-time measurement and detection array avoidance and has the broad application prospects.

The invention discloses a tantalum surface carbonization modification method and a product prepared through the tantalum surface carbonization modification method. The method aims to solve the problems that the melting point of a tantalum material is high, an existing tantalum carbonization surface modification technology is complex in technique, and modified layer structures cannot be controlled easily. According to the method, on the premise that the state of impurities in a vacuum chamber is controlled, methane gas is ionized, a carbon element is introduced to the surface of metal tantalum through bombardment of carbon ion beams, heat generated by bombardment of the ion beams is used for heating so as to help the carbon element diffuse into the metal tantalum, a carbide modified layer is formed on the surface of the metal tantalum, and thus, the melt corrosion resistance of the surface of the metal tantalum is improved. The preparation technique is simple, the production efficiency is high, cost is low, and requirements of industrial large-scale application can be met. Meanwhile, the product prepared through the method has good melt corrosion resistance and is worthy of large-scale application and popularization.

The invention relates to a carbon-based multilayer film which is characterized in that the carbon-based multilayer film comprises a base body, a transition layer and a ta-C layer, wherein the transition layer comprises a metal Ta layer, a metal Ti layer and a TiC layer, and the metal Ta layer, the metal Ti layer, the TiC layer and the ta-C layer are sequentially arranged on the base body in a stacked mode. According to the method, the electric arc is combined with the bias voltage to generate a high-energy carbon ion beam to bombard the metal Ti surface layer, and the TiC layer is formed by implanting the carbon ions into the Ti surface, so that the metal Ti layer and the ta-C layer have very strong interface bonding, the use performance of the film can be remarkably improved, and the service life of the film can be remarkably prolonged.

The invention relates to a seedling method for irradiating kiwi fruit seeds through high-energy carbon ion beam, and belongs to the technical field of molecular genetic breeding. The method comprisesthe following steps: firstly, laying the kiwi fruit seeds into a transparent container, and performing high-energy carbon ion beam irradiation on the kiwi fruit seeds, with the irradiation strength being 40 to 100Gy, so as to obtain irradiated kiwi fruit seeds; secondly, sowing the irradiated kiwi fruit seeds into a matrix to culture the kiwi fruit seeds, so as to obtain kiwi fruit seedlings; thirdly, transplanting the kiwi fruit seedlings. Control of the radiation dosage of the high-energy carbon ion beam can achieve the purpose of effective radiation mutation, can further reduce the influence of excessive mutation on the kiwi fruit seeds by the high-energy carbon ion beam. The method can ensure that the germination rate of the kiwi fruit seeds subjected to mutation reaches 26 to 44 percent and the transplanting survival rate is greater than 70 percent, simply and effectively keeps high germination rate and survival rate of the kiwi fruit seeds subjected to mutation, and provides basic conditions for the future research on kiwi fruit materials subjected to high-energy ion mutation and realizing of high-efficiency breeding of kiwi fruit.

The invention discloses a method for improving the surface abrasion performance and prolonging the service life of a nitride coating cutter. The method comprises the following steps that ultrasonically cleaning is carried out on the nitride coating cutter, then dehydrating and drying are carried out, and then the nitride coating cutter is put into a vacuum chamber; a cold cathode penning ion source is utilized, high-energy argon ion beams are adopted for carrying out homogenized ion sputtering treatment on the nitride surface of the nitride coating cutter, then argon ion beam extraction voltage is reduced, ion beam polishing treatment is carried out, and the smoothness of the nitride surface is improved; and arc discharge is utilized, arc discharge is generated on the surface of a cathode graphite target of an arc ion source, carbon plasmas are generated in an anode graphite cylinder of the arc ion source, the carbon plasmas enter a filtering magnetic field to be filtered, then pure carbon ion beams are formed, and the pure carbon ion beams enter a scanning magnetic field after being focused through a magnetic lens field, and uniformly depositing is carried out on the surface of a nitride coating of the polished nitride coating cutter through a magnetic field scanning technology to form an amorphous tetrahedral carbon film.

A charged particle cancer therapy system is used to accelerate an anion, such a C⁻, and to convert the anion to a cation, such as C⁶⁺, through use of one or more electron extraction subsystems. A first example of an electron extraction subsystem is a hydrogen gas electron stripping system. A second example of an electron extraction subsystem is a carbon foil electron stripping system. The resultant cation is accelerated in a synchrotron, transported along a beam-line, and targeted to a tumor resulting in ablation of the tumor.

The invention discloses a carbon fiber negative-ion transmitting end assembly. The assembly comprises a plurality of transmitting heads, the transmitting heads are disposed on a base strip side by side, nuts are embedded in the base strip, and the base strip is buckled and connected to a bottom box; each transmitting head comprises a metal head, each metal head has two-segment structure, a carbon fiber beam is plugged into the front segment of each metal head via a jack and is fixed through tin soldering, and a threaded rod part of the rear segment of each metal head is fixedly connected with the corresponding nut; and the bottom box is provided with a bus board, and the bus board abuts against far ends of the threaded rod parts of the metal heads. Preferably, the jacks are blind holes, and threaded segments are formed; the periphery of the front segment of each metal head is externally hexagonal; and the far end of each threaded rod part is in the shape of a truncated cone, and the bus board is provided with a bearing hole for abutting against a conical surface of the truncated cone. The carbon fiber negative-ion transmitting end assembly is advantageous in that the transmitting heads of a transmitting end are convenient to replace, a loose or falling-off hidden trouble does not exist in a use process, and the transmitting heads also can be washed or cleaned individually; and the carbon fiber negative-ion transmitting end assembly has the advantages of firmly soldered carbon fiber beams, reliable connection with the bus board, simple structure, convenient assembly and disassembly, high production efficiency and high reliability.