研究目的
To fabricate a high performance cold cathode x-ray source using a point-typed CNT field emitter and evaluate its performance in terms of x-ray image resolution and operational stability.
研究成果
The cold cathode x-ray source using a point-typed CNT field emitter demonstrated high performance in I-V characteristics and produced high-resolution x-ray images. The electron beam transmittance was about 57.7%, and the source showed dependency of image quality on tube voltage and current, indicating potential for various x-ray system applications.
研究不足
The study focuses on the fabrication and initial performance evaluation of the x-ray source. Long-term stability and scalability for industrial applications are not addressed.
1：Experimental Design and Method Selection:
The cold cathode x-ray source was designed with a point-typed CNT field emitter, metal mesh gate electrode, metal hole focusing lens, and tungsten target anode electrode, all mounted in a SUS vacuum chamber.
2：Sample Selection and Data Sources:
Single-walled or thin multi-walled CNTs were used to fabricate free-standing CNT films.
3：List of Experimental Equipment and Materials:
Components included a SUS vacuum chamber, CNT film, metal mesh gate electrode, metal hole focusing lens, tungsten target anode electrode, and Be window.
4：Experimental Procedures and Operational Workflow:
The CNT film was prepared via vacuum filtration, fixed in a triangular shape, and mounted in the vacuum chamber. The gap distances between components were adjusted for optimal performance. DC voltage was applied to gate and anode electrodes, and currents were measured.
5：Data Analysis Methods:
X-ray images were obtained using CR (Kodak 707) and evaluated for resolution by Phantom.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
