5 results about "Neutron yield" patented technology

The application provides a neutron tube testing device and a testing method. The neutron tube testing device comprises a vacuum mechanism, an atmosphere control mechanism, a feeding mechanism and a supporting mechanism, the vacuum mechanism and the atmosphere control mechanism are both installed on the supporting mechanism, the feeding mechanism is installed in the vacuum mechanism, and the atmosphere control mechanism is connected with the vacuum mechanism. The device is used for testing the service life of a neutron target and the neutron yield of the neutron target, and checking the qualified rate of the neutron target in the production link. The neutron target is tested before the neutron tube is sealed, so that the whole neutron tube is prevented from being scrapped, material waste is avoided, and the research and development testing time is prevented from being delayed. The device is used for researching the influence of different film thicknesses on the neutron yield of the neutron target, the influence of different magnetic field strengths, different extraction hole structures and other factors on the ion source, and the influence of different structure ion sources or different structure accelerating electrodes on the neutron yield, so that the economic cost and time cost of the sealed neutron tube are reduced.

This invention relates to the field of ion source technology and discloses a transmission system for a small negative high-voltage neutron source. The transmission system includes a transmission tube, a plasma electrode, an extraction electrode, a Helmholtz coil, and an aperture. The transmission tube has a vacuum channel, and the plasma electrode and the extraction electrode are located inside the vacuum channel, downstream of the plasma electrode in the beam transmission direction. The Helmholtz coil is located outside the transmission tube. This transmission system can overcome the technical problem of how to achieve 100 mA beam transmission and beam homogenization within a limited structural size for a small negative high-voltage neutron source. The Helmholtz coil and aperture can effectively suppress the space charge effect of the ion source, enhance the beam transmission efficiency, and improve beam homogenization. Simultaneously, it can reduce the target surface heat load, improve neutron yield, and increase the target's service safety and lifespan.

The application relates to the technical field of composite targets, and discloses a composite breeding target system for BNCT, which comprises a Be-Li composite target and a primary breeding system, the primary breeding system is located at the back of the Be-Li composite target, and the two form a composite target structure, wherein the primary breeding system comprises a uranium layer and an aluminum substrate layer, the uranium layer is attached to the aluminum substrate layer, the output efficiency and quality of neutrons can be effectively improved through optimization of a neutron generation and breeding process, thereby providing a more efficient neutron source for BNCT, the composite breeding target system for BNCT can improve the neutron yield after proton targeting, and can also make the neutron energy generated by the Li layer consistent with the neutron energy generated by the Be layer.

The application relates to a magnetic confinement fusion plasma temperature diagnosis method, device and equipment, wherein the method comprises the following steps: establishing a neutron yield database, including a thermonuclear fusion neutron yield database and a beam-target reaction neutron yield database; collecting ion density and total neutron yield of external experimental equipment; assuming that only beam-target reaction exists in an initial stage, obtaining an initial temperature estimation value based on the ion density and the total neutron yield; obtaining first neutron yield and second neutron yield based on the initial temperature estimation value and the ion density, and obtaining theoretical total neutron yield; comparing the difference between the total neutron yield and the theoretical total neutron yield until convergence, obtaining the temperature estimation value as the plasma temperature; and outputting a diagnosis result as an initial temperature of the next moment to realize time sequence evolution analysis. The scheme fully utilizes the thermonuclear fusion and beam-target reaction database, effectively distinguishes the contributions of the two types of reactions to the neutron yield, and avoids the limitations of a traditional single reaction model.

The application relates to a neutron source with an ion beam guiding function, which comprises an ion source, an accelerating electrode, a neutron target group and an insulated flow guide mechanism, the ion source is used for ionizing gas to generate an ion beam; the neutron target group is installed on one side of the ion source, the accelerating electrode is installed between the ion source and the neutron target group, and the flow guide mechanism is installed between the ion source and the neutron target group; the accelerating electrode is used for applying a voltage and forming an electric field one between the accelerating electrode and the ion source, the electric field one accelerates the ion beam, and charged ions in the ion beam deposit on the inner surface of the flow guide mechanism until a stable electric field two is formed, the electric field two focuses and guides the ion beam entering the inside of the flow guide mechanism, and the ion beam bombards the neutron target group to generate neutrons. The application has the advantages of simple structure, reasonable design, realization of ion beam focusing and collimation, improvement of the neutron yield of the neutron generator, adjustment of the positions of the neutron target and the flow guide mechanism, generation of neutron beams with different outgoing directions and multiple functions.