Results 11 to 20 of about 169,728 (265)

Laser-Plasma Spectroscopy of Hydroxyl with Applications [PDF]

Molecules, 2020
This article discusses laser-induced laboratory-air plasma measurements and analysis of hydroxyl (OH) ultraviolet spectra. The computations of the OH spectra utilize line strength data that were developed previously and that are now communicated for the ...
Christian G. Parigger, Christopher M. Helstern, Benjamin S. Jordan, David M. Surmick, Robert Splinter   +4 more
doaj   +4 more sources

Laser-Plasma Spatiotemporal Cyanide Spectroscopy and Applications

Molecules, 2020
This article reports new measurements of laser-induced plasma hypersonic expansion measurements of diatomic molecular cyanide (CN). Focused, high-peak-power 1064 nm Q-switched radiation of the order of 1 TW/cm 2 generated optical breakdown plasma
Christian G. Parigger, Christopher M. Helstern, Benjamin S. Jordan, David M. Surmick, Robert Splinter   +4 more
doaj   +3 more sources

Investigation and diagnostics of plasma flows in a pulsed plasma accelerator for experimental modelling of processes in tokamaks

Eurasian Journal of Physics and Functional Materials, 2021
This paper presents the experimental results on electron, ion temperatures and densities in a pulsed plasma accelerator. The values of electron densities and temperatures were computed using the methods of relative intensities of Hα and Hβ lines, Hβ ...
M. K. Dosbolayev, A. B. Tazhen, T. S. Ramazanov   +2 more
doaj   +1 more source

From the Vector to Scalar Perturbations Addition in the Stark Broadening Theory of Spectral Lines

Universe, 2021
The effect of plasma Coulomb microfied dynamics on spectral line shapes is under consideration. The analytical solution of the problem is unachievable with famous Chandrasekhar–Von-Neumann results up to the present time.
Valery Astapenko, Andrei Letunov, Valery Lisitsa   +2 more
doaj   +1 more source

Experimental and numerical investigation of magneto-plasma optical properties toward measurements of opacity relevant for compact binary objects

Frontiers in Astronomy and Space Sciences, 2022
Electromagnetic transients known as kilonovae (KN), are among the photonic messengers released in the post-merger phase of compact binary objects, for example, binary neutron stars, and they have been recently observed as the electromagnetic counterpart ...
Angelo Pidatella, David Mascali, Matteo Bezmalinovich, Matteo Bezmalinovich, Giulia Emma, Giulia Emma, Maria Mazzaglia, Bharat Mishra, Bharat Mishra, Giorgio Finocchiaro, Giorgio Finocchiaro, Alessio Galatà, Salvo Marletta, Giorgio Sebastiano Mauro, Eugenia Naselli, Domenico Santonocito, Giuseppe Torrisi, Sergio Cristallo, Sergio Cristallo, Marco La Cognata, Albino Perego, Albino Perego, Roberta Spartà, Aurora Tumino, Aurora Tumino, Diego Vescovi   +25 more
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Simultaneous Observation of Tungsten Spectra of W⁰ to W⁴⁶⁺ Ions in Visible, VUV and EUV Wavelength Ranges in the Large Helical Device

Atoms, 2021
Spectroscopic studies for emissions released from tungsten ions have been conducted in the Large Helical Device (LHD) for contribution to the tungsten transport study in tungsten divertor fusion devices and for expansion of the experimental database of ...
Tetsutarou Oishi, Shigeru Morita, Daiji Kato, Izumi Murakami, Hiroyuki A. Sakaue, Yasuko Kawamoto, Tomoko Kawate, Motoshi Goto   +7 more
doaj   +1 more source

Atomic Data for Calculation of the Intensities of Stark Components of Excited Hydrogen Atoms in Fusion Plasmas

Atoms, 2020
Motional Stark effect (MSE) spectroscopy represents a unique diagnostic tool capable of determining the magnitude of the magnetic field and its direction in the core of fusion plasmas.
Oleksandr Marchuk, David R. Schultz, Yuri Ralchenko   +2 more
doaj   +1 more source

Application of Deep Learning to Spectroscopic Features of the Balmer-Alpha Line for Hydrogen Isotopic Ratio Determination in Tokamaks

Applied Sciences, 2022
We propose in this paper the use of artificial intelligence, especially deep learning algorithms, for the isotopic ratio determination for hydrogen–deuterium mixtures.
Mohammed Koubiti, Malo Kerebel
doaj   +1 more source

Quantitative Analysis of Cerium-Gallium Alloys Using a Hand-Held Laser Induced Breakdown Spectroscopy Device

Atoms, 2019
A hand-held laser-induced breakdown spectroscopy device was used to acquire spectral emission data from laser-induced plasmas created on the surface of cerium-gallium alloy samples with Ga concentrations ranging from 0−3 weight percent.
Ashwin P. Rao, Matthew T. Cook, Howard L. Hall, Michael B. Shattan   +3 more
doaj   +1 more source

The role of plasma–atom and molecule interactions on power & particle balance during detachment on the MAST Upgrade Super-X divertor

Nuclear Fusion, 2023
This paper shows first quantitative analysis of the detachment processes in the MAST Upgrade Super-X divertor (SXD). We identify an unprecedented impact of plasma-molecular interactions involving molecular ions (likely $D_2^+$ ), resulting in strong ion ...
K. Verhaegh, B. Lipschultz, J.R. Harrison, F. Federici, D. Moulton, N. Lonigro, S.P. Kobussen, M. O’Mullane, N. Osborne, P. Ryan, T. Wijkamp, B. Kool, E. Rose, C. Theiler, A.J. Thornton, the MAST Upgrade Team   +15 more
doaj   +1 more source