41 results about "Proton energy" patented technology

An improved 3He nuclear reactor with provision for direct electric conversion of a relativistic proton stream into useable electric power at a voltage level compatible with the national power grid (one million V DC). Various embodiments include multiple collector cages for extracting relativistic protons of various energy levels, diverter wires for deflecting high-energy proton streams to either side of lower energy cages to avoid unwanted impact. Other embodiments include arrangements for dividing multi-megavolt voltages down to a useable one megavolt level compatible with the national power grid. Further embodiments comprise guiding the proton stream by the cusps of magnetron cavities to permit conversion of the relativistic proton energies into microwave power. A proposal is also made for harvesting 3He from the Moon to supply earth-bound and space-bound reactors. A solution to the problem of charging a potential well-forming anode in an electrostatic fusion reactor without electrical arcing is further disclosed.

The invention discloses a medical proton linear accelerator. The medical proton linear accelerator comprises an ECR ion source, an RFQ accelerator, an SDTL and a traveling wave proton accelerator which are connected in sequence; a separated type drift tube linear accelerator, namely SDTL, is adopted in an intermediate energy acceleration section; the traveling wave proton accelerator is adopted in a high energy acceleration section, so that the medical proton linear accelerator is more compact in structure and smaller in occupied space; the energy of the emitted proton beams can be continuously adjustable within a rang of 70-250MeV, so that the requirement of adjusting energy of different beams in a patient body due to different tumor positions in tumor treatment can be satisfied; in addition, the SDTL and the traveling wave proton accelerator both adopt a structure which is formed by multiple sections connected in sequence, and can be constructed in different periods and different stages, so as to satisfy requirement on proton energy of different hospitals; and energy upgrading also can be performed according to treatment demands in post periods.

The invention relates to a method for improving the electrical properties of an AlGaN / GaN HEMT (High-Electron-Mobility Transistor) device. The method comprises the step of carrying out proton irradiation on the AlGaN / GaN HEMT device under the condition of a preset irradiation temperature, proton fluence and proton energy. By use of the embodiment of the invention, the protons of certain fluence and energy can be adopted to carry out irradiation on the AlGaN / GaN HEMT device, incoming protons can make up inherent defects in the device so as to reduce defect density, the capture of defects on a current carrier is lowered, electric density is increased, grid leakage current is reduced, the maximum saturation current and transconductance of the device can be improved, and therefore, the electric performance of the device is improved.

The invention discloses a method for inversing a radiation source, which is to measure a PDD curve by a water tank or other radiation dosimetry measuring equipment. Information of the high accuracy radiation source can be acquired by the method, including photon energy spectrum, or proton energy spectrum, or electron energy spectrum and photon pollution and other radiation information. The methodhas the advantages that: the information of the photon energy spectrum, the electron energy spectrum, the proton energy spectrum, photon pollution and other radiation source information of the radiation source can be simultaneously reestablished; the defect that the prior energy spectrum calculation method can not accurately acquire multiple radiation source information can be overcome; while theaccurate energy spectrum of the radiation source is accurately acquired, the information of the photon pollution and other information can be acquired; correct information of the radiation source canbe provided for dose calculation; information of scattered or continuous energy spectrum and the photon pollution can be acquired; and the accurate radiation source can be realized by a plurality of algorithms so as to solve the problem that the prior single algorithm can not ensure that the inverse of the energy spectrum has a solution.

The present invention discloses a conical cylinder shaped magnet based proton magnetic spectrometer. The proton magnetic spectrometer comprises a collimating slit, a conical cylinder shaped magnet device and a CR39 medium, wherein the collimating slit is used for introducing protons and filtering protons with relatively large horizontal divergence angles; the conical cylinder shaped magnet device comprises an outer shell, an inner shell, and permanent magnets which are fixed between the outer shell and the inner shell and are distributed radially; a space surrounded by all the permanent magnets forms a magnetic field loop capable of enabling the motion direction of filtered protons to be deflected; and the CR39 medium is used for recording proton signals after deflection so as to obtain proton energy spectrum information. The conical cylinder shaped magnet based proton magnetic spectrometer disclosed by the present invention is reasonable in structure, ingenious in design and small in volume, well solves the technical defects of large volume, low magnetic field strength and nonuniform magnetic field distribution of an existing proton magnetic spectrometer, and realizes effective acquisition of proton signals, therefore, the conical cylinder shaped magnet based proton magnetic spectrometer disclosed by the present invention is suitable for popularization and application.