Acoustic wave amplification in a plasma of a molecular gaseous discharge

Galechyan, G. A.; Mkrtchyan, A. R.

doi:10.1134/1.1478109

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…The acoustic vibrations of ions, neutral atoms, and molecules which arose at modulation of discharge current interact with vibrations of the electric field of this discharge current which aroused these acoustic vibrations. As a result of such interaction all plasma medium transfers into a new state which academician of the National Academy of Sciences of Armenia Alpik Mkrtchyan has termed "Acoustoplasma" [19,20]. Some acoustoplasma phenomena can be gained also by feeding the discharge tube only with alternating current, without direct components.…”

Section: Jinst 19 C07005mentioning

confidence: 99%

On the possibility of accelerating charged particles in the low-pressure acoustoplasma and plasma bunches in the air

Abrahamyan,

Chilingaryan,

Mkhitaryan

et al. 2024

J. Inst.

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In this paper obtained results of two experimental investigations are presented: on the acceleration of electrons in low-pressure acoustoplasma discharge and acceleration of plasma bunch-plasmoids in the air. The first experimental results on the acceleration of electrons in the low-pressure discharge were obtained in 2008. In the current paper an attempt to explain the obtained results by means of wake accelerations of particles in electromagnetic fields without utilization of usual drivers is made. Formerly calculated theoretical data for accelerated particles even in the energy range of 10–100 eV are experimentally confirmed. Experimental investigations on origination and initiating acceleration of plasma bunches in crossed fields in the air were conducted in 2023. In the current paper the obtained first results on acceleration of the originated long-life plasmoids in the air are presented as an announcement of our planned subsequent corresponding investigations. To carry out corresponding experiments a unique experimental setup, as well as appropriate devices and equipment were developed. A new conceptual model of a plasmoid is offered. The realization of this concept opens the possibility of carrying out the experimental investigations of the phenomena of origination of long-life plasmoids in air. During the experimental investigations, any ionizing additives into the discharge were not injected.

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Section: Jinst 19 C07005mentioning

confidence: 99%

On the possibility of accelerating charged particles in the low-pressure acoustoplasma and plasma bunches in the air

Abrahamyan,

Chilingaryan,

Mkhitaryan

et al. 2024

J. Inst.

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“…In the acoustoplasmic regime, the current comprises both constant and variable components, and acoustic instabilities manifest in the plasma as waves [6,7]. The discharge current acts as the control parameter.…”

Section: Theoretical Approachmentioning

confidence: 99%

Application of the catastrophe theory to acoustoplasma research

Abrahamyan,

Sahakyan,

Chilingaryan

2023

J. Phys.: Conf. Ser.

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In the paper the possibility of applying the mathematical theory of catastrophes to the processes occurring during the interaction of acoustic fields with plasma is considering. In particular, it is proposed to apply the theory to find out possible jumps in parameters and phase transitions in an acoustoplasmic medium. Based on the experimentally obtained database (in this case, for acoustoplasmic processes), a mathematical model of the process under study was constructed. And then, applying the theory of catastrophes, it is determined whether there are sudden changes in the values of control parameters in the area under consideration, critical points of unstable equilibrium and phase transitions, i.e. catastrophic parameter jumps. The choice of the equation describing the process is made based on the number of control parameters for this process. It is also proposed to use the methodology in various fields of science and technology, where similar conditions may arise.

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“…The works [3,4] laid the foundation for studying the interaction of acoustic waves with plasma. The monograph [5] is devoted to the acoustoplasma state. As it was noted in [6] that in the acoustoplasma mode the amplitude of the variable component is less than the direct one and there is no reignition of the discharge.…”

Section: Introductionmentioning

confidence: 99%

Generation of radiation on forbidden transitions in the region of 654-658 nm in an acoustoplasmic medium

Abrahamyan,

Chilingaryan,

Melikyan

et al. 2023

J. Phys.: Conf. Ser.

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In the region of the first positive system (FPS) band of spectrum of nitrogen in acoustoplasma, under laboratory conditions, the generation of intense lines was experimentally obtained at forbidden transitions of a singly ionized nitrogen molecule at 654.81 and 658.36 nm. The intense lines obtained correspond to the stimulated emission mechanism. The intensity of the forbidden lines significantly (up to 17 times) exceeded the intensity of neighboring lines in the spectrum of the first positive system band of nitrogen. Spectroscopic studies did not allow resolution of the rotational spectrum. However, the spectral width for both lines at forbidden transitions is much smaller than the FPS bandwidth of nitrogen. The result obtained is explained by an analogue of Raman scattering and an acoustoplasmic medium, which remove the prohibitions characteristic of dipole radiation.

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Acoustic wave amplification in a plasma of a molecular gaseous discharge

Cited by 6 publications

References 5 publications

On the possibility of accelerating charged particles in the low-pressure acoustoplasma and plasma bunches in the air

On the possibility of accelerating charged particles in the low-pressure acoustoplasma and plasma bunches in the air

Application of the catastrophe theory to acoustoplasma research

Generation of radiation on forbidden transitions in the region of 654-658 nm in an acoustoplasmic medium

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