Direct measurements of classical and enhanced gradient-aligned cross-field ion flows in a helicon plasma source using laser-induced fluorescence

2015 ◽  
Vol 22 (12) ◽  
pp. 122103 ◽  
Author(s):  
M. Umair Siddiqui ◽  
Derek S. Thompson ◽  
Julianne M. McIlvain ◽  
Zachary D. Short ◽  
Earl E. Scime
Keyword(s):  
Plasma Source ◽  
Laser Induced Fluorescence ◽  
Helicon Plasma ◽  
Direct Measurements

Different operational regimes in a helicon plasma source

2001 ◽  
Vol 72 (12) ◽  
pp. 4377-4382 ◽  
Author(s):  
V. Kaeppelin ◽  
M. Carrère ◽  
J. B. Faure
Keyword(s):  
Plasma Source ◽  
Helicon Plasma

High-Density Helicon Plasma Source for Linear Plasma Generators

2021 ◽  
Vol 47 (6) ◽  
pp. 526-535
Author(s):  
E. I. Kuzmin ◽  
I. V. Shikhovtsev
Keyword(s):  
Plasma Source ◽  
High Density ◽  
Helicon Plasma ◽  
Linear Plasma ◽  
Plasma Generators

Characterizing the plasma-induced thermal loads on a 200-kW light-ion helicon plasma source via infra-red thermography

2021 ◽  
Author(s):  
Juan Francisco Caneses ◽  
Clyde Beers ◽  
Saikat Chakraborty Thakur ◽  
Michael James Simmonds ◽  
Richard H Goulding ◽  
...  
Keyword(s):  
Plasma Source ◽  
Thermal Loads ◽  
Helicon Plasma ◽  
Infra Red

Cavity ring-down spectroscopy to measure negative ion density in a helicon plasma source for fusion neutral beams

2018 ◽  
Vol 89 (10) ◽  
pp. 103504 ◽  
Author(s):  
R. Agnello ◽  
M. Barbisan ◽  
I. Furno ◽  
Ph. Guittienne ◽  
A. A. Howling ◽  
...  
Keyword(s):  
Plasma Source ◽  
Negative Ion ◽  
Cavity Ring Down Spectroscopy ◽  
Helicon Plasma ◽  
Ion Density ◽  
Neutral Beams ◽  
Cavity Ring Down

A Study on Low Dielectric Material Deposition Using a Helicon Plasma Source

1996 ◽  
Vol 143 (9) ◽  
pp. 2990-2995 ◽  
Author(s):  
Jung‐Hyung Kim ◽  
Sang‐Hun Seo ◽  
Seok‐Min Yun ◽  
Hong‐Young Chang ◽  
Kwang‐Man Lee ◽  
...  
Keyword(s):  
Dielectric Material ◽  
Plasma Source ◽  
Helicon Plasma ◽  
Low Dielectric ◽  
Material Deposition

rf power system for thrust measurements of a helicon plasma source

2010 ◽  
Vol 81 (7) ◽  
pp. 075106 ◽  
Author(s):  
Alexander W. Kieckhafer ◽  
Mitchell L. R. Walker
Keyword(s):  
Power System ◽  
Plasma Source ◽  
Rf Power ◽  
Helicon Plasma

scholarly journals Studies of the helicon plasma source with inhomogeneous magnetic field

2016 ◽  
Author(s):  
I. V. Shikhvotsev ◽  
V. I. Davydenko ◽  
A. A. Ivanov ◽  
I. A. Kotelnikov ◽  
E. I. Kuzmin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Plasma Source ◽  
Inhomogeneous Magnetic Field ◽  
Helicon Plasma

scholarly journals Single-photon laser-induced fluorescence detection of nitric oxide at sub-parts-per-trillion mixing ratios

2020 ◽  
Vol 13 (5) ◽  
pp. 2425-2439 ◽  
Author(s):  
Andrew W. Rollins ◽  
Pamela S. Rickly ◽  
Ru-Shan Gao ◽  
Thomas B. Ryerson ◽  
Steven S. Brown ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Detection Limit ◽  
Fluorescence Detection ◽  
Narrow Band ◽  
Single Photon ◽  
Spectral Feature ◽  
Laser Induced Fluorescence ◽  
Mixing Ratios ◽  
Laser Induced Fluorescence Detection ◽  
Direct Measurements

Abstract. We describe a newly developed single-photon laser-induced fluorescence sensor for measurements of nitric oxide (NO) in the atmosphere. Rapid tuning of a narrow-band laser on and off of a rotationally resolved NO spectral feature near 215 nm and detection of the red-shifted fluorescence provides for interference-free direct measurements of NO with a detection limit of 1 part per trillion by volume (pptv) for 1 s of integration, or 0.3 pptv for 10 s of integration. Uncertainty in the sensitivity of the instrument is typically ±6–9 %, with no known interferences. Uncertainty in the zero of the detector is shown to be <0.2 pptv. The instrument was deployed on the NASA DC-8 aircraft during the NASA/NOAA FIREX-AQ experiment (Fire Influence on Regional to Global Environments Experiment – Air Quality) during July–September 2019 and provided more than 140 h of NO measurements over 22 flights, demonstrating the ability of this instrument to operate routinely and autonomously. Comparisons with a seasoned chemiluminescence sensor during FIREX-AQ in a variety of chemical environments provides validation and confidence in the accuracy of this technique.

scholarly journals Characterization of hydrogen plasma in a permanent ring magnet based helicon plasma source for negative ion source research

2019 ◽  
Vol 61 (6) ◽  
pp. 065003 ◽  
Author(s):  
A Pandey ◽  
Debrup Mukherjee ◽  
Dipshikha Borah ◽  
M Bandyopadhyay ◽  
Himanshu Tyagi ◽  
...  
Keyword(s):  
Hydrogen Plasma ◽  
Plasma Source ◽  
Ion Source ◽  
Negative Ion ◽  
Helicon Plasma ◽  
Ring Magnet
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