| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for detecting a trajectory drawn by particles descending in a vessel and a particle velocity distribution.SOLUTION: A plurality of particles 100 stored in a vessel 10 and having predetermined particle sizes are caused to gradually descend by gravity, and unloaded from a lower opening 12. Provided is a method for detecting a trajectory drawn by the particles 100 by transmitting a radiations in the vessel 10. The method includes: a step of adding at least one particle shielding the radiations and acting as an indicator for the particles 100 stored in the vessel 10; a step of providing a plurality of X-ray sources 20 irradiating side surfaces of the vessel 10 with radiations from different directions, respectively; a step of providing a plurality of detectors 30 opposite to the respective X-ray sources 20 across the vessel 10; and determining a trajectory of the indicator particle on the basis of signals detected by the detectors 30. |
