Characterization of chemical contaminants and their spectral properties from an atmospheric pressure ns-pulsed microdischarge in neon
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Univ. of New Mexico, Albuquerque, NM (United States)
Portable applications of microdischarges will mandate operation in the presence of contaminant species. This paper examines the temporal evolution of microdischarge optical and ultraviolet emissions during pulsed operation by experimental methods. By varying the pulse length of a microdischarge initiated in a 4-hole silicon microcavity array operating in a 655 Torr ambient primarily composed of Ne, we were able to measure the emission growth rates for different contaminant species native to the discharge environment as a function of pulse length. It was found that emission from hydrogen and oxygen impurities demonstrated similar rates of change, while emissions from molecular and atomic nitrogen, measured at 337.1 and 120 nm’s respectively, exhibited the lowest rate of change. We conclude that it is likely that O2 undergoes the same resonant energy transfer process between rare gas excimers that has been shown for H2. Further, efficient resonant processes were found to be favored during ignition and extinction phases of the pulse, while emission at the 337.1 nm line from N2 was favored during the intermediate stage of the plasma. In addition to experimental results, a zero-dimensional analysis is also presented to further understand the nature of the microdischarge.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE; USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1356220
- Alternate ID(s):
- OSTI ID: 1349535
- Report Number(s):
- SAND--2016-9770J; 647882
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 24; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Direct current microhollow cathode discharges on silicon devices operating in argon and helium
|
journal | February 2018 |
Similar Records
Vacuum emission and breakdown characteristics of a planar He-Xe microdischarge
Numerical analysis of the microdischarge in a DC plasma display panel by 2-dimensional multifluid equations
Journal Article
·
Sun Jan 30 23:00:00 EST 2000
· Applied Physics Letters
·
OSTI ID:20215172
Numerical analysis of the microdischarge in a DC plasma display panel by 2-dimensional multifluid equations
Journal Article
·
Thu Jun 01 00:00:00 EDT 1995
· IEEE Transactions on Plasma Science
·
OSTI ID:118958