Results 1 to 10 of about 169,728 (265)

Laboratory Hydrogen-Beta Emission Spectroscopy for Analysis of Astrophysical White Dwarf Spectra

Atoms, 2018
This work communicates a review on Balmer series hydrogen beta line measurements and applications for analysis of white dwarf stars. Laser-induced plasma investigations explore electron density and temperature ranges comparable to white dwarf star ...
Christian G. Parigger, Kyle A. Drake, Christopher M. Helstern, Ghaneshwar Gautam   +3 more
doaj   +1 more source

Spatially-Resolved Electron Density Measurement in Hydrogen Pellet Ablation Cloud

Atoms, 2018
A spectroscopic method for spatial resolution measurement in fuel pellet ablation clouds is being developed in the Large Helical Device (LHD). Spatial resolution is obtained thanks to optics that have a narrow, band-shaped field-of-view.
Guillaume Seguineaud, Gen Motojima, Yoshiro Narushima, Motoshi Goto   +3 more
doaj   +1 more source

Plasma Spectroscopy on an Aluminum-Pellet Ablation Cloud in an LHD Plasma with an Echelle Spectrometer

Atoms, 2020
We developed an echelle spectrometer for the simultaneous observation of the whole visible range with a high instrumental resolution, for example, 0.055 nm (full width at the half maximum) at 400 nm and 0.10 nm at 750 nm.
Hirotaka Tanaka, Keisuke Fujii, Taiichi Shikama, Shigeru Morita, Motoshi Goto, Masahiro Hasuo   +5 more
doaj   +1 more source

Effect of Plasma on Polyethylene by Positron Lifetime Spectroscopy [PDF]

علوم و تکنولوژی پلیمر, 2022
Hypothesis: The use of plasma is widely used as a method to change polymer surfaces. The use of atmospheric cold plasma has more advantages than other plasma, laser and X-ray methods. This method is simple and it uses inexpensive equipment.
Maryam Azizi, Mahdieh Bakhtiari Ramezani, Effat Yahaghi, Mojtaba Nohekhan   +3 more
doaj   +1 more source

A Simple Laser-Induced Breakdown Spectroscopy Method for Quantification and Classification of Edible Sea Salts Assisted by Surface-Hydrophilicity-Enhanced Silicon Wafer Substrates

Sensors, 2023
Salt, one of the most commonly consumed food additives worldwide, is produced in many countries. The chemical composition of edible salts is essential information for quality assessment and origin distinction.
Han-Bum Choi, Seung-Hyun Moon, Hyang Kim, Nagaraju Guthikonda, Kyung-Sik Ham, Song-Hee Han, Sang-Ho Nam, Yong-Hoon Lee   +7 more
doaj   +1 more source

Plasma Spectroscopy

Fusion Science and Technology, 2010
A brief introduction into the spectroscopy of fusion plasmas is presented. Basic principles of the emission of ionic, atomic and molecular radiation is explained and a survey of the effects, which lead to the population of the respective excited levels, is given. Line radiation, continuum radiation, opacity and line broadening mechanisms are addressed.
openaire   +4 more sources

Breakdown Spectroscopy Induced by Nonlinear Interactions of Femtosecond Laser Filaments and Multidimensional Plasma Gratings

Ultrafast Science, 2023
Breakdown spectroscopy is a valuable tool for determining elements in solids, liquids, and gases. All materials in the breakdown region can be ionized and dissociated into highly excited fragments and emit characteristic fluorescence spectra.
Mengyun Hu, Shupeng Xu, Shuai Yuan, Heping Zeng   +3 more
doaj   +1 more source

Spectroscopic investigations of detachment on the MAST Upgrade Super-X divertor

Nuclear Fusion, 2022
We present the first analysis of the atomic and molecular processes at play during detachment in the MAST-U Super-X divertor using divertor spectroscopy data.
K. Verhaegh, B. Lipschultz, J.R. Harrison, N. Osborne, A.C. Williams, P. Ryan, J. Allcock, J.G. Clark, F. Federici, B. Kool, T. Wijkamp, A. Fil, D. Moulton, O. Myatra, A. Thornton, T.O.S.J. Bosman, C. Bowman, G. Cunningham, B.P. Duval, S. Henderson, R. Scannell, the MAST Upgrade team   +21 more
doaj   +1 more source

Use of the Plasma Spectrum RMS Signal for Arc-Welding Diagnostics

Sensors, 2009
A new spectroscopic parameter is used in this paper for on-line arc-welding quality monitoring. Plasma spectroscopy applied to welding diagnostics has typically relied on the estimation of the plasma electronic temperature, as there is a known ...
Jose-Miguel Lopez-Higuera, Juan Maria Etayo, Marta Davila, Jose Fuentes, Adolfo Cobo, Jesus Mirapeix   +5 more
doaj   +1 more source

Studying of Plasma- Polymerized Pyrrole at Variable Gas Flow Rates Via Plasma Jet

Iraqi Journal of Physics, 2021
     In this manuscript has investigated the synthesis of plasma-polymerized pyrrole (C4H5N) nano-particles prepared by the proposed atmospheric pressure nonequilibrium plasma jet through the parametric studies, particularly gas flow rate (0.5, 1 and 1 ...
Saba Jawad Kadhem
doaj   +1 more source