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碳纳米管的热辅助场辐射特性和在脉冲X射线成像中的应用

Zhiqiang Xia^1,2, Shichao Feng³, Xiaodong Sun¹

¹Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China.

Nanomaterials (Basel, Switzerland)

|March 13, 2026

概括

热辅助碳纳米管 (CNT) 阴极提高了脉冲X射线成像的电子发射稳定性. 这种方法提高了性能,并为高速成像应用提供了微秒级脉冲响应.

科学领域:

电子真空电子电子真空
材料科学材料科学材料科学

背景情况:

碳纳米管 (CNT) 阴极提供出色的电子发射,但在实际应用中面临稳定性和时间分辨率方面的挑战.
现有的CNT阴极技术需要改进,以实现可靠的脉冲X射线成像.

研究的目的:

为了研究 CNT 阴极的热辅助场辐射特性.
评估这些增强阴极在脉冲X射线成像中的应用.

主要方法:

系统地描述开启时电场强度和排放稳定性.
在热辅助下分析脉冲响应特征.
使用CNT阴极进行脉冲X射线成像实验.

主要成果:

热辅助操作将电流波动降低到1%以下,并提高了排放稳定性.
增加的加热功率降低了开机场强度和提高了稳定性.
与热电阴极相比,微秒级脉冲响应实现了较低的功耗.
稳定的X射线剂量生成使高速旋转物体的100μs脉冲成像成为可能.

结论:

热辅助的CNT阴极可用于高速X射线成像.
这项技术为开发先进的脉冲X射线源提供了可行的途径.
这些发现为未来真空电子和成像技术的进步提供了参考.

关键词:

在X射线成像中使用X射线成像.碳纳米管的使用方法现场排放的现场排放脉冲响应脉冲响应的时间

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