Patent Number: 
Section: claims

1. A target device for a neutron generating device, comprising:a plurality of solid particles serving as a target body; anda target body reaction chamber configured for accommodating the plurality of solid particles such that the solid particles are discharged from the target body reaction chamber by gravity,wherein the solid particles accommodated in the target body reaction chamber are configured to generate neutrons when a beam is applied to the solid particles,wherein the target body reaction chamber has an injection conduit defining an injection opening and a discharge conduit defining a discharge opening, and the solid particles are injected into the target body reaction chamber through the injection opening and moved out of the target body reaction chamber through the discharge opening, andwherein a ratio of a diameter of the target body reaction chamber to a particle diameter of the plurality of solid particles is in a range of 5:1-30:1. 2. The target device of claim 1, whereinthe solid particles have at least one of a spherical shape, an ellipsoidal shape, and a polyhedral shape. 3. The target device of claim 1, wherein the solid particle comprises anyone of tungsten, a tungsten alloy, uranium, a uranium alloy, uranium ceramics, thorium, a thorium alloy, and thorium ceramics. 4. An accelerator-excited neutron generating device comprising:the target device according to claim 1; anda solid particle conveying device for injecting the solid particles into the target body reaction chamber. 5. The accelerator-excited neutron generating device of claim 4, further comprising:a cooling device, wherein the solid particles are cooled by the cooling device after the solid particles are moved out of the target body reaction chamber, and then the solid particles are injected into the target body reaction chamber by the solid particle conveying device. 6. The accelerator-excited neutron generating device of claim 4, further comprising:a sorting device configured such that those of the solid particles that conform to a predetermined standard are selected from the solid particles by the sorting device after the solid particles are moved out of the target body reaction chamber, and then injected into the target body reaction chamber. 7. The accelerator-excited neutron generating device of claim 4, whereinthe solid particles have at least one of a spherical shape, an ellipsoidal shape, and a polyhedral shape. 8. The accelerator-excited neutron generating device of claim 4, further comprising: a buffer chamber disposed at a solid particle injection opening for temporarily storing the solid particles. 9. The accelerator-excited neutron generating device of claim 4, whereinthe solid particle conveying device is configured to circulate the solid particles from an inside of the target body reaction chamber through an outside of the target body reaction chamber to the inside of the target body reaction chamber while the beam is applied to the solid particles. 10. The accelerator-excited neutron generating device of claim 9, further comprising: a cooling device and a sorting device, wherein the solid particles which are being circulated and situated outside the target body reaction chamber are cooled by the cooling device, and those of the solid particles that conform to a predetermined standard are selected by the sorting device from the solid particles which are being circulated and situated outside the target body reaction chamber. 11. A beam coupling method for the accelerator-excited neutron generating device according to claim 4, comprising:injecting the solid particles serving as the target body into the target body reaction chamber, andapplying a beam to the solid particles. 12. The beam coupling method of claim 11, wherein the solid particles are circulated from an inside of the target body reaction chamber through an outside of the target body reaction chamber to the inside of the target body reaction chamber while the beam is applied to the solid particles. 13. The beam coupling method of claim 12, wherein the solid particles which are being circulated and situated outside the target body reaction chamber are processed. 14. The beam coupling method of claim 13, wherein the processing comprises cooling the solid particles and selecting those of the solid particles that conform to a predetermined standard from the solid particles. 15. The target device of claim 1, wherein a ratio of a caliber of the injection conduit to the diameter of the target body reaction chamber is in a range of 1:1-1:10. 16. The target device of claim 1, wherein a ratio of a caliber of the discharge conduit to the diameter of the target body reaction chamber is in a range of 1:1-1:10.