filamentary cathode

简明释义

直热式阴级

英英释义

例句

1.The lifespan of devices using a filamentary cathode can be significantly increased with proper cooling mechanisms.

使用丝状阴极的设备，如果配备适当的冷却机制，使用寿命可以显著延长。

2.The efficiency of the light bulb can be improved by optimizing the filamentary cathode design.

通过优化丝状阴极设计，可以提高灯泡的效率。

3.In electron microscopy, the filamentary cathode plays a crucial role in generating a focused beam of electrons.

在电子显微镜中，丝状阴极在生成聚焦电子束方面起着至关重要的作用。

4.Researchers are exploring new materials for the filamentary cathode to enhance electron emission.

研究人员正在探索新材料用于丝状阴极以增强电子发射。

5.The vacuum tube operates effectively thanks to the heat generated by the filamentary cathode.

真空管的有效运作得益于由丝状阴极产生的热量。

作文

In the field of electronics and physics, the term filamentary cathode refers to a specific type of cathode used in vacuum tubes and various electronic devices. A filamentary cathode is typically made of a thin wire or filament that is heated to emit electrons through thermionic emission. This process is fundamental to the operation of many electronic components, including cathode ray tubes (CRTs) and certain types of electron microscopes. Understanding how a filamentary cathode functions is crucial for anyone studying electronics, as it plays a pivotal role in the generation of electron beams.The principle behind the filamentary cathode lies in thermionic emission. When the filament is heated to a high temperature, it gains enough energy to release electrons from its surface. These free electrons can then be directed towards an anode, creating a flow of electric current. The efficiency and effectiveness of a filamentary cathode can be influenced by several factors, including the material used for the filament, its temperature, and the surrounding vacuum conditions.Common materials for filamentary cathodes include tungsten and tantalum, both of which have high melting points and are capable of withstanding the extreme temperatures required for thermionic emission. Tungsten, in particular, is favored due to its robustness and ability to emit electrons efficiently when heated. The design of the filamentary cathode also plays a significant role in its performance; for instance, a coiled filament can increase the surface area, thereby enhancing electron emission.In practical applications, filamentary cathodes are often used in devices such as oscilloscopes, televisions, and other display technologies where electron beams are essential. In these contexts, the filamentary cathode serves as the source of electrons that are manipulated to create images on screens. The control of the electron beam is vital for image clarity and quality, making the filamentary cathode a critical component in these systems.Moreover, advancements in technology have led to the development of alternative cathode designs, such as planar cathodes and cold cathodes, which do not rely on heating to emit electrons. However, the filamentary cathode remains a popular choice due to its simplicity and reliability in various applications. Understanding the mechanics of the filamentary cathode allows engineers and technicians to troubleshoot issues effectively and optimize the performance of electronic devices.In conclusion, the filamentary cathode is a fundamental component in the realm of electronics, facilitating the emission of electrons through thermionic processes. Its design, materials, and operational principles are essential knowledge for anyone involved in electronics and electrical engineering. As technology continues to evolve, the filamentary cathode will likely remain a key player in the development of electronic devices, underscoring the importance of understanding its function and applications in modern technology.

在电子和物理学领域，短语filamentary cathode指的是在真空管和各种电子设备中使用的一种特定类型的阴极。filamentary cathode通常由一根细丝或灯丝制成，通过热电子发射来发射电子。这一过程是许多电子元件（包括阴极射线管（CRT）和某些类型的电子显微镜）操作的基础。理解filamentary cathode的工作原理对于任何学习电子学的人来说都是至关重要的，因为它在电子束的产生中发挥着关键作用。filamentary cathode背后的原理在于热电子发射。当灯丝被加热到高温时，它获得足够的能量从其表面释放电子。这些自由电子随后可以朝向阳极移动，形成电流的流动。filamentary cathode的效率和效果可能会受到几种因素的影响，包括用于灯丝的材料、其温度和周围的真空条件。常见的filamentary cathode材料包括钨和钽，这两种材料都有较高的熔点，能够承受热电子发射所需的极端温度。特别是钨因其坚固耐用和在加热时有效发射电子的能力而受到青睐。filamentary cathode的设计在其性能中也起着重要作用；例如，卷曲的灯丝可以增加表面积，从而增强电子发射。在实际应用中，filamentary cathode通常用于示波器、电视机和其他显示技术中，这些设备中电子束是必不可少的。在这些情况下，filamentary cathode作为电子的源头，被操控以在屏幕上创建图像。电子束的控制对于图像清晰度和质量至关重要，使得filamentary cathode在这些系统中成为一个关键组件。此外，技术的进步导致了替代阴极设计的发展，例如平面阴极和冷阴极，这些阴极不依赖加热就能发射电子。然而，由于其简单性和可靠性，filamentary cathode仍然是一个受欢迎的选择，广泛应用于各种场合。理解filamentary cathode的机制使工程师和技术人员能够有效地排除故障并优化电子设备的性能。总之，filamentary cathode是电子领域中的一个基础组件，通过热电子过程促进电子的发射。其设计、材料和操作原理是任何参与电子学和电气工程的人的基本知识。随着科技的不断发展，filamentary cathode可能仍将是电子设备发展的关键角色，强调了理解其功能和在现代技术中应用的重要性。