Abstract
Using a focused Q-switched ruby laser, multiphoton ionization of the background gas of an ordinary vacuum system was observed by the time-of-flight method and an electron multiplier. The number of free electrons created at the focal region was found to be at least more than 20. Since a few free electrons would be sufficient for the initiation of the laser-induced spark in gases (Young and Hercher), it was thus concluded that multiphoton ionization of gas impurities is the initiation mechanism of the optical breakdown of gases, as is generally believed.
Publisher
Canadian Science Publishing
Subject
General Physics and Astronomy
Cited by
27 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献