emtting cathode

简明释义

发射阴极

英英释义

例句

1.Researchers are studying new materials for emitting cathodes to improve performance.

研究人员正在研究新的发射阴极材料以提高性能。

2.The efficiency of the device depends significantly on the quality of the emitting cathode.

设备的效率在很大程度上取决于发射阴极的质量。

3.The electron beam is generated from the emitting cathode in the vacuum tube.

电子束是由真空管中的发射阴极产生的。

4.The lifespan of an emitting cathode can affect the overall durability of the device.

发射阴极的寿命会影响设备的整体耐用性。

5.In a cathode ray tube, the emitting cathode plays a crucial role in image formation.

在阴极射线管中，发射阴极在图像形成中起着至关重要的作用。

作文

The concept of an emitting cathode is fundamental in the field of electronics and physics, particularly in devices such as cathode ray tubes and various types of vacuum tubes. An emitting cathode refers to a component that emits electrons when heated or subjected to a strong electric field. This phenomenon is known as thermionic emission, where the heat energy supplied to the cathode allows electrons to overcome the work function of the material, thus enabling them to escape into the vacuum. Understanding how an emitting cathode functions is crucial for the development of many electronic devices.In a typical cathode ray tube, which was widely used in older television sets and computer monitors, the emitting cathode plays a pivotal role. It is usually made from materials such as tungsten or a combination of barium and strontium oxides, which have a low work function and can efficiently emit electrons. When the cathode is heated, it emits a stream of electrons that are then accelerated towards the anode by an applied electric field. This process generates a beam of electrons that can be manipulated to create images on a phosphorescent screen.The efficiency and performance of an emitting cathode can significantly impact the overall functionality of the device it resides in. For instance, advancements in materials science have led to the development of new cathode materials that enhance electron emission rates and improve the longevity of the cathodes. Research into nanostructured materials has shown promise in creating more efficient emitting cathodes, which could lead to lighter, thinner, and more energy-efficient display technologies.Moreover, the principles behind the emitting cathode are not limited to traditional vacuum tubes. They also play a role in modern applications such as electron microscopes and certain types of lasers, where controlled electron emission is essential for achieving high-resolution imaging or generating coherent light. In these applications, the design and material composition of the emitting cathode are carefully optimized to meet specific operational requirements.In conclusion, the emitting cathode is a critical element in various electronic devices, serving as the source of electrons necessary for their operation. Its functionality is based on the principles of thermionic emission, which allows electrons to escape from heated materials. As technology continues to evolve, the exploration of new materials and designs for emitting cathodes will remain a vital area of research, promising enhanced performance and efficiency in future electronic devices.

发射阴极的概念在电子学和物理学领域中是基础，特别是在阴极射线管和各种类型的真空管中。发射阴极指的是在加热或施加强电场时发射电子的组件。这种现象被称为热电子发射，其中施加于阴极的热能使电子克服材料的功函数，从而使它们能够逃逸到真空中。理解发射阴极的功能对许多电子设备的发展至关重要。在典型的阴极射线管中，这种管子曾广泛用于旧式电视机和计算机显示器，发射阴极起着关键作用。它通常由钨或钡和锶氧化物的组合制成，这些材料具有低功函数，能够有效地发射电子。当阴极被加热时，它会发出一束电子流，然后通过施加的电场加速到阳极。这一过程产生了一束可以操控的电子，用于在荧光屏上创建图像。发射阴极的效率和性能会显著影响其所处设备的整体功能。例如，材料科学的进步导致了新阴极材料的发展，这些材料提高了电子发射率并改善了阴极的使用寿命。对纳米结构材料的研究显示出创造更高效的发射阴极的前景，这可能导致更轻、更薄和更节能的显示技术。此外，发射阴极背后的原理不仅限于传统的真空管。它们在现代应用中也发挥着作用，如电子显微镜和某些类型的激光器，在这些应用中，受控的电子发射对于实现高分辨率成像或产生相干光至关重要。在这些应用中，发射阴极的设计和材料组成经过精心优化，以满足特定的操作要求。总之，发射阴极是各种电子设备中的关键元素，作为其操作所需电子的来源。其功能基于热电子发射的原理，允许电子从加热材料中逃逸。随着技术的不断发展，对新材料和发射阴极设计的探索将仍然是一个重要的研究领域，承诺在未来的电子设备中实现更高的性能和效率。