Laser induced photo-detachment of O2 in DC discharge

作     者：j r legorreta j l patiNo f b yousif J R LEGORRETA;J L PATINO;F B YOUSIF

作者机构：Centro de Investigacion en CienciasUniversidad Autonoma del Estado de Morelos.Av.UniversidadNo.1001 Col.Chamilpa Cuemavaca MorelosMexico 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2018年第20卷第7期

页      面：98-105页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 09[农学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 0904[农学-植物保护] 081001[工学-通信与信息系统] 090401[农学-植物病理学] 090402[农学-农业昆虫与害虫防治] 

基　　金：financed by CONACy T with contract#41072-F,PRODEP the Programa Integral de Fortalecimiento Institucinal-2 

主　　题：electronegative plasma electron temperature Langmuir probe negative ion number density 

摘      要：Determination of the negative ion number density of O2 and O in a DC discharge of oxygen plasma was made employing Langmuir probe in conjunction with eclipse laser photo- detachment technique. The temporal evolution of the extra electrons resulting from the photo- detachment of O2- and O- were used to evaluate the negative ion number density. The ratio of O2 number density to O varied from 0.03 to 0.22. Number density of both O~ and O increased with increasing power and decreased as the pressure was increased. Electron number density was evaluated from the electron energy distribution function （EEDF） using the I-V recorded characteristic curves. Electron temperature between 2 and 2.7 eV were obtained. Influence of the 02（al△g） metastable state is discussed.