heated cathode

简明释义

旁热式阴极

英英释义

例句

1.Researchers are developing new materials for heated cathodes to improve their longevity.

研究人员正在开发新材料用于加热阴极以提高其使用寿命。

2.The performance of the heated cathode can significantly affect the efficiency of the device.

设备的效率可以受到加热阴极性能的显著影响。

3.A heated cathode is often used in gas discharge lamps to initiate the ionization process.

加热阴极通常用于气体放电灯以启动电离过程。

4.The vacuum tube uses a heated cathode to emit electrons, which are essential for its operation.

真空管使用加热阴极来发射电子，这对其操作至关重要。

5.In electron microscopy, the heated cathode provides a stable source of electrons for imaging.

在电子显微镜中，加热阴极提供了稳定的电子源用于成像。

作文

The concept of a heated cathode is crucial in various fields of electronics and physics. A heated cathode refers to a type of cathode that is heated to emit electrons through thermionic emission. This phenomenon occurs when the temperature of the cathode increases to a point where it can release electrons into a vacuum or gas, allowing for the flow of electric current. In many applications, such as vacuum tubes and cathode ray tubes, the heated cathode plays an essential role in generating and controlling electron beams. One of the primary advantages of using a heated cathode is its ability to produce a stable and reliable source of electrons. Unlike cold cathodes, which can have erratic performance due to their reliance on field emission, heated cathodes provide a consistent electron emission as long as they are maintained at the appropriate temperature. This stability is particularly important in devices like oscilloscopes and televisions, where precise control over electron beams is necessary for accurate display and measurement. Historically, the development of the heated cathode revolutionized the field of electronics. The introduction of vacuum tubes in the early 20th century allowed for the amplification and switching of electrical signals, paving the way for modern electronics. These vacuum tubes often utilized heated cathodes, which enhanced their functionality and efficiency. As technology progressed, the invention of transistors eventually led to the decline of vacuum tubes, but the principles behind heated cathodes still find relevance in specialized applications today.In addition to their use in vacuum tubes, heated cathodes are also found in various types of gas discharge lamps, such as neon lights and fluorescent lamps. In these devices, the heated cathode serves to initiate the ionization of gas, which then allows for the conduction of electricity and the production of light. The efficiency of these lamps can be significantly influenced by the characteristics of the heated cathode, making it an important factor in their design and operation.Moreover, in the realm of space exploration, heated cathodes are employed in electric propulsion systems, such as ion thrusters. These systems utilize heated cathodes to emit ions that are then accelerated by electric fields, providing thrust for spacecraft. The high efficiency and specific impulse of ion propulsion make it an attractive option for deep-space missions, and the heated cathode is a fundamental component in this technology.In conclusion, the heated cathode is a vital element in many electronic devices and systems, playing a significant role in the emission of electrons and the functioning of various technologies. Its historical significance in the development of electronics cannot be understated, and its continued use in modern applications highlights its enduring importance. Understanding the principles and applications of heated cathodes is essential for anyone interested in the fields of electronics, physics, and engineering. As technology continues to evolve, the role of heated cathodes may also adapt, but their foundational concepts will remain integral to advancements in the industry.

“加热阴极”的概念在电子学和物理学的各个领域中至关重要。“加热阴极”是指一种通过热电子发射而被加热以发射电子的阴极。这种现象发生在阴极的温度升高到足以使其释放电子进入真空或气体时，从而允许电流的流动。在许多应用中，例如真空管和阴极射线管，“加热阴极”在生成和控制电子束方面发挥了重要作用。使用“加热阴极”的主要优点之一是能够产生稳定可靠的电子源。与冷阴极不同，冷阴极由于依赖于场发射而可能表现不稳定，而“加热阴极”只要保持在适当的温度下，就能提供一致的电子发射。这种稳定性在示波器和电视等设备中尤为重要，因为在这些设备中，精确控制电子束对于准确显示和测量是必要的。历史上，“加热阴极”的发展彻底改变了电子学领域。20世纪初真空管的引入使得电信号的放大和切换成为可能，为现代电子学铺平了道路。这些真空管通常利用“加热阴极”，提高了它们的功能和效率。随着技术的进步，晶体管的发明最终导致真空管的衰退，但“加热阴极”背后的原理在今天的某些专业应用中仍然具有相关性。除了在真空管中的应用外，“加热阴极”还出现在各种类型的气体放电灯中，如霓虹灯和荧光灯。在这些设备中，“加热阴极”用于启动气体的电离，从而允许电流的导通和光的产生。这些灯的效率可以受到“加热阴极”特性的显著影响，使其成为设计和操作中的重要因素。此外，在太空探索领域，“加热阴极”被用于电推进系统，如离子推进器。这些系统利用“加热阴极”发射离子，然后通过电场加速，从而为航天器提供推力。离子推进的高效率和比冲使其成为深空任务的有吸引力的选择，而“加热阴极”是这一技术的基本组成部分。总之，“加热阴极”是许多电子设备和系统中的重要元素，在电子发射和各种技术的功能中发挥着重要作用。它在电子学发展中的历史意义不可低估，其在现代应用中的持续使用突显了它的重要性。理解“加热阴极”的原理和应用对于任何对电子学、物理学和工程学感兴趣的人来说都是至关重要的。随着技术的不断发展，“加热阴极”的角色也可能会适应变化，但其基础概念将继续在行业的进步中保持不可或缺的地位。