Electron density and plasma dynamics of a colliding plasma experiment

Wiechula, J.; Schönlein, A.; Iberler, M.; Hock, Christian; Manegold, T.; Bohlender, Bernhard; Jacoby, J.

doi:10.1063/1.4959590

Cited by 12 publications

(3 citation statements)

References 26 publications

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“…This code is based on the collisional radiative model which includes the collisional processes of local nature and non-local radiative processes of plasma. FLYCHK is widely used in plasma spectroscopy as it provides the population distributions of different energy states as a function of different plasma parameters such as temperature and density and hence, can estimate the plasma parameters by comparing the experimental population distributions with the simulated ones [15,24]. In this work, the emission spectrum obtained experimentally from argon plasma shows a higher population of singly ionized argon atom excitations as compared to neutral atom excitations as well as other charged states.…”

Section: Charge State Distributions and Electron Temperaturementioning

confidence: 94%

Effect of external longitudinal magnetic field on the dynamics of pulsed plasma stream

Singha¹,

Neog²,

Borthakur³

2023

Phys. Scr.

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A spectroscopic study is carried out to investigate pulsed plasma stream produced in a coaxial plasma accelerator under the influence of an external longitudinal magnetic field. The dynamics of Argon plasma stream that includes the excitations and emissions of plasma species and its different parameter variations on the application of an external longitudinal magnetic field is reported in this work. The behavior of the ionized and neutral species of argon plasma is studied from their intensity distribution profiles which indicates the occurrence of faster recombination as compared to field free case. The variation of pressure on the plasma stream reveal significant influence on the recombination and diffusion process of the plasma species. Moreover, the variation of cathode voltage leads to variation in input energy to the system which influences the ionization and excitation processes of the plasma species. A plasma density (Ne) jump is achieved from 1021-1022 m-3 at relatively higher pressure ~ 8 bar plenum pressure in presence of magnetic field. Saturation of the emissions and excitations of plasma species are revealed from intensity profile and electron excitation temperature (Texc) profile which occur at different pressure and voltage both for field and field-free cases. The electron temperature (Te) is estimated using FLYCHK code by comparing the simulated charge state distributions with the experimental findings. Using known parameters in the code, the different estimated Te shows a linear and an exponential decrement respectively in absence and presence of magnetic field. Maximum Te of 2.2 eV is reported which decreases to 1.51 eV at significant increase of plasma density of 1022 m-3.

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Section: Charge State Distributions and Electron Temperaturementioning

confidence: 94%

Effect of external longitudinal magnetic field on the dynamics of pulsed plasma stream

Singha¹,

Neog²,

Borthakur³

2023

Phys. Scr.

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“…The plasma characteristic parameters such as electron density, electron excitation temperature, and gas temperature can be diagnosed by relevant spectral line information. [54][55][56] Combined with phase-resolved OES diagnosis (PROES), the plasma morphology and its dynamic discharge characteristics such as spatial and temporal resolution can be characterized. In this technology, the plasma excitation source is controlled by a synchronous signal, and the ICCD is controlled by different delay signals.…”

Section: Oesmentioning

confidence: 99%

“…In addition to the presence of ground state particles, there are also a large number of excited particles generated in the plasma discharge which can be obtained by OES. The plasma characteristic parameters such as electron density, electron excitation temperature, and gas temperature can be diagnosed by relevant spectral line information 54–56 …”

Section: Artpmentioning

confidence: 99%

Recent progress of atmospheric and room‐temperature plasma as a new and promising mutagenesis technology

Li,

Shen,

Ding

et al. 2024

Cell Biochemistry & Function

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At present, atmospheric and room‐temperature plasma (ARTP) is regarded as a new and powerful mutagenesis technology with the advantages of environment‐friendliness, operation under mild conditions, and fast mutagenesis speed. Compared with traditional mutagenesis strategies, ARTP is used mainly to change the structure of microbial DNA, enzymes, and proteins through a series of physical, chemical, and electromagnetic effects with the organisms, leading to nucleotide breakage, conversion or inversion, causing various DNA damages, so as to screen out the microbial mutants with better biological characteristics. As a result, in recent years, ARTP mutagenesis and the combination of ARTP with traditional mutagenesis have been widely used in microbiology, showing great potential for application. In this review, the recent progress of ARTP mutagenesis in different application fields and bottlenecks of this technology are systematically summarized, with a view to providing a theoretical basis and technical support for better application. Finally, the outlook of ARTP mutagenesis is presented, and we identify the challenges in the field of microbial mutagenesis by ARTP.

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Current sheet characteristics of a parallel-plate electromagnetic plasma accelerator operated in gas-prefilled mode

et al. 2018

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The axial characteristics of a current sheet in a parallel-plate electromagnetic plasma accelerator operated in gas-prefilled mode are reported. The accelerator is powered by a fourteen stage pulse forming network. The capacitor and inductor in each stage are 1.5 μF and 300 nH, respectively, and yield a damped oscillation square wave of current with a pulse width of 20.6 μs. Magnetic probes and photodiodes are placed at various axial positions to measure the behavior of the current sheet. Both magnetic probe and photodiode signals reveal a secondary breakdown when the current reverses the direction. An increase in the discharge current amplitude and a decrease in pressure lead to a decrease in the current shedding factor. The current sheet velocity and thickness are nearly constant during the run-down phase under the first half-period of the current. The current sheet thicknesses are typically in the range of 25 mm to 40 mm. The current sheet velocities are in the range of 10 km/s to 45 km/s when the discharge current is between 10 kA and 55 kA and the gas prefill pressure is between 30 Pa and 800 Pa. The experimental velocities are about 75% to 90% of the theoretical velocities calculated with the current shedding factor. One reason for this could be that the idealized snowplow analysis model ignores the surface drag force.

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Electron density and plasma dynamics of a colliding plasma experiment

Cited by 12 publications

References 26 publications

Effect of external longitudinal magnetic field on the dynamics of pulsed plasma stream

Effect of external longitudinal magnetic field on the dynamics of pulsed plasma stream

Recent progress of atmospheric and room‐temperature plasma as a new and promising mutagenesis technology

Current sheet characteristics of a parallel-plate electromagnetic plasma accelerator operated in gas-prefilled mode

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