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回顾气体激光器的发展史,初期的器件常用热阴极,之后逐渐广泛采用冷阴极。近几年来发展的新型横向激励高气压激光器(TEA器件)采用了电子束控制气体放电新技术,它把放电大流子形成的过程(导电离)和使这些大流子有效地获得激发激光上能级所必须的能量的过程(主放电)分离出来,从而使冷阴极的应用拓广到大功率器件的范围。 热阴极缺点是明显的:温升时间长(造成电子发射的时间迟滞)
Review of the history of the development of gas lasers, the initial device commonly used hot cathode, followed by the widespread use of cold cathode. In recent years, the development of a new type of lateral excitation high pressure laser (TEA device) uses a new electron beam control gas discharge technology, which discharges the formation of the process (conduction) and make these large effective excitation of the laser on the laser The energy level required for the energy level (main discharge) is separated so that cold cathode applications can be extended to high power devices. The disadvantages of the hot cathode are obvious: long temperature rise (hysteresis of electron emission time)