See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/230930715 Second derivative Langmuir probe measurements of negative oxygen ion concentration taking into account the plasma... Article in Plasma Sources Science and Technology · October 2001 DOI: 10.1088/0963-0252/10/4/310 CITATIONS 12 READS 106 2 authors: Some of the authors of this publication are also working on these related projects: "Scrape-off layer plasma parameter measurements in WEST" View project Tsv K Popov Sofia University "St. Kliment Ohridski" 62 PUBLICATIONS 257 CITATIONS SEE PROFILE Sanka Gateva Bulgarian Academy of Sciences 60 PUBLICATIONS 289 CITATIONS SEE PROFILE All content following this page was uploaded by Sanka Gateva on 04 January 2017. The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately.