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2022 ◽  
Vol 227 ◽  
pp. 107111
Author(s):  
A.Ya. Pak ◽  
K.B. Larionov ◽  
E.N. Kolobova ◽  
K.V. Slyusarskiy ◽  
J. Bolatova ◽  
...  


2022 ◽  
Vol 204 ◽  
pp. 112065
Author(s):  
Si-Tian Zang ◽  
Jie Luan ◽  
Ling Li ◽  
Hui-Xin Yu ◽  
Qi-Jun Wu ◽  
...  


Author(s):  
Andrew Fu Wah Ho ◽  
Mervyn Jun Rui Lim ◽  
Huili Zheng ◽  
Aloysius Sheng-Ting Leow ◽  
Benjamin Yong-Qiang Tan ◽  
...  


2022 ◽  
Vol 204 ◽  
pp. 111975
Author(s):  
Toyib Olaniyan ◽  
Lauren Pinault ◽  
Chi Li ◽  
Aaron van Donkelaar ◽  
Jun Meng ◽  
...  


2022 ◽  
Vol 148 ◽  
pp. 107757
Author(s):  
V. Zinnecker ◽  
S. Madden ◽  
C. Stokes-Griffin ◽  
P. Compston ◽  
A.V. Rode ◽  
...  


2022 ◽  
Vol 806 ◽  
pp. 150298
Author(s):  
David J.X. Gonzalez ◽  
Christina K. Francis ◽  
Gary M. Shaw ◽  
Mark R. Cullen ◽  
Michael Baiocchi ◽  
...  




Author(s):  
Tim Jacobus Adrianus Staps ◽  
Tim Jacobus Maria Donders ◽  
Bart Platier ◽  
J Beckers

Abstract Negative ions are an important constituent of the spatial afterglow of atmospheric pressure plasmas, where the fundamental plasma-substrate interactions take place that are vital for applications such as biomedicine, material synthesis, and ambient air treatment. In this work, we use laser-induced photodetachment to liberate electrons from negative ions in the afterglow region of an atmospheric pressure plasma jet interacting with an argon-oxygen mixture, and microwave cavity resonance spectroscopy (MCRS) to detect the photodetached electrons. This diagnostic technique allows for the determination of the electron density and the effective collision frequency before, during and after the laser pulse was shot through the measurement volume with nanosecond time resolution. From a laser saturation study, it is concluded that O− is the dominant negative ion in the afterglow. Moreover, the decay of the photodetached electron density is found to be dominantly driven by the (re)formation of O− by dissociative attachment of electrons with O2. As a consequence, we identified the species and process responsible for the formation of negative ions in the spatial afterglow in our experiment.



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