研究目的
Investigating the design and performance of a multi-focal spot electron gun for distributed X-ray sources to enhance computed tomography (CT) imaging.
研究成果
The multi-focal spot electron gun satisfies the requirements of most imaging applications and provides additional possibilities for distributed X-ray sources and stationary CT. Future research will focus on reducing switching time and designing a wide range of distributed sources using multiple multi-spot electron guns.
研究不足
The multi-focal spot electron gun obtains deflection amplitude at the price of the focal spot size of the source. The repeatability is acceptable, but the switching time is longer. The deflection amplitude is limited by the structure of the multi-spot electron gun itself.
1：Experimental Design and Method Selection:
The study proposes a novel multi-focal spot electron gun scheme using a dispenser cathode, mesh grid, and two electrostatic lenses for beam shaping, focusing, and deflecting.
2：Sample Selection and Data Sources:
The experiment uses a dispenser cathode as the electron emitter and measures the performance of the electron gun under various conditions.
3：List of Experimental Equipment and Materials:
Includes a dispenser cathode, mesh grid, electrostatic lenses, and anode target.
4：Experimental Procedures and Operational Workflow:
The electron beam's trajectory is controlled by adjusting the potential of two half-rectangle opening electrodes to achieve multi-focal spots on the anode target.
5：Data Analysis Methods:
The focal spot size is measured using pin-hole imaging, and the deflection amplitude is analyzed in relation to the potential difference between the focusing electrodes.
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