Influence of Longitudinal Magnetic Field in the MPC Channel on the Density of Generated Plasma Stream

Marchenko, A. K.; Byrka, O.V.; Makhlai, V.А.; Herashenko, S.S.; Solyakov, D. G.; Volkova, Yu.Ye.; Yeliseyev, D.V.; Novakowska-Langier, K.

doi:10.46813/2021-131-057

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Optical spectroscopy was used for the determination of plasma parameters (electron density and temperature) in front of exposed surfaces and the studies of the target impurity behavior in the plasma shield during a plasma surface interaction. It should be noted that the hydrogen spectral line H (4861 Å), as well as the line of He II with a wavelength of 4685 Å were used to evaluate plasma density [9,10]. Exposition time was 10 s.…”

Section: Experimental Facility and Diagnosticsmentioning

confidence: 99%

The Effect of a Small Helium Addition on the Plasma-Surface Interaction in Qspa

Makhlai¹,

Herashchenko²,

Petrov³

et al. 2023

Problems of Atomic Science and Technology

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The synergistic effects of tungsten exposure to combined hydrogen and helium particle fluxes as well as transient thermal loads need to be extensively studied for implementation of fusion reactor project. The mixture of hydrogen and helium was used as the working gas for plasma stream generation within the QSPA-M accelerator. The parameters of the mixed hydrogen and helium plasma were similar to those of pure hydrogen plasma generated in QSPA-M. It was shown that the small addition of helium (5 %) to hydrogen does not strongly influence plasma surface interaction. The influence of the external magnetic field on plasma surface interaction is also discussed.

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Section: Experimental Facility and Diagnosticsmentioning

confidence: 99%

The Effect of a Small Helium Addition on the Plasma-Surface Interaction in Qspa

Makhlai¹,

Herashchenko²,

Petrov³

et al. 2023

Problems of Atomic Science and Technology

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“…This transient plasma has drawn attention from the scientific community due to its successful application in different fields of fusion research such as plasma material interaction (PMI) study [5,6], plasma refueling [7], the study of vapor shielding effects [8,9], simulation of astrophysical plasmas [10]. Similar types of devices such as QSPA-M [11], Magneto plasma compressor (MPC) [12], and MK-200UG [13] has also an external magnetic field to confine and collimate the plasma beam for fusion-related PMI study. Garkusha et al reported an increase in plasma material shielding layer in QSPA-M with a magnetic field [9].…”

Section:  Introductionmentioning

confidence: 99%

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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Flows of ionizing gas in the plasma accelerator channel with longitudinal magnetic field

Козлов

2022

Physics of Fluids

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Model and results of numerical experiments are presented for axisymmetric flows of ionizing gas in the presence of an additional longitudinal magnetic field in the channel of quasi-stationary plasma accelerator considered as perspective electric propulsion plasma engine. A two-dimensional flow model for a three-component medium consisting of atoms, ions, and electrons is based on magnetogasdynamic equations written in terms of the vector potential of magnetic field, taking into account electrical conductivity, thermal conductivity, and radiation transfer. A three-dimensional model of radiative transfer includes main mechanisms of emission and absorption for different parts of the spectrum. Numerical studies of the ionization process and radiation transfer were carried out in an approximation of local thermodynamic equilibrium. The stabilizing effect of flow rotation in the presence of a longitudinal magnetic field and thermal conductivity along the magnetic field on non-stationary unstable flows of ionizing gas, which arise at low discharge currents, is considered.

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Influence of Longitudinal Magnetic Field in the MPC Channel on the Density of Generated Plasma Stream

Cited by 3 publications

References 11 publications

The Effect of a Small Helium Addition on the Plasma-Surface Interaction in Qspa

The Effect of a Small Helium Addition on the Plasma-Surface Interaction in Qspa

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

Flows of ionizing gas in the plasma accelerator channel with longitudinal magnetic field

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