Using of catastrophe theory for processing of experimental results measured in low-temperature plasma

Abrahamyan, A. S.; Mikayelyan, A. S.; Sahakyan, Q. G.; Khachatryan, B.V.

doi:10.3103/s1068337211040074

Cited by 4 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The root mean square deviations are typically much smaller and very often of the order of the thickness of the solid line. The increase in the deviations of the minimum and maximum values from the mean at a large depth of modulation were caused by the acoustoplasma mode becoming unstable and the phase transitions that can occur between different acoustoplasma states and between an acoustoplasma state and the plasma state without acoustic perturbation [16,17].…”

Section: Resultsmentioning

confidence: 99%

Control of Co2 Laser Power by Acoustic Fields

Abrahamyan¹,

Chilingaryan²

2019

REFFIT

View full text Add to dashboard Cite

The present study investigates the optimization of the operation of the CO2 laser in the acoustoplasma mode (i.e., dependence of the laser radiation power on the composition of the working mixture, pressure, value of the direct component of the discharge current, frequency, and modulation depth). A three-dimensional dependence on the frequency and modulation depth of the discharge current is experimentally obtained for the normalized efficiency of the conversion of the electric power supplied to the discharge tube into laser power. The maximum gain when transition to the acoustoplasma mode exceeds 2.5 times. The optimum depth of the discharge current modulation is 0.5–0.7. The laser radiation power modulation caused by the discharge current modulation is measured. Laser power is not modulated at modulation frequencies of current >1 kHz. Meanwhile, at current modulation frequencies <0.5 kHz, the modulation depth of the laser radiation power nonlinearly depends on the modulation depth of the discharge current and has a threshold character. The modulation depth of the laser radiation power is associated with the creation of an acoustoplasma and not simply with the discharge current modulation.

show abstract

Section: Resultsmentioning

confidence: 99%

Control of Co2 Laser Power by Acoustic Fields

Abrahamyan¹,

Chilingaryan²

2019

REFFIT

View full text Add to dashboard Cite

show abstract

“…We made a theoretical assessment, of the possibility of acceleration of electrons in discharge tubes, by excitement of acoustic fields in low-pressure plasma, i.e., creation of acoustoplasma [23,24]. In these works, it was shown that acoustic fields form in plasma small cells, of the spatial division of charges, with a high value of local electric fields.…”

Section: Jinst 19 C07005mentioning

confidence: 99%

“…In this case there is no so-called "collapse of a wave", as at acceleration in the high energy range. Electron acceleration effect in the discharge to be described in [23,24]. Δε -increase in the energy of the accelerated electron (in eV) for one act of acceleration in one cell, φ e -initial phase of oscillations of the electron component at the entry of an electron into a cell (rad), Δφ -phase shift between the oscillations of the electron and ion components (rad).…”

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.

View full text Add to dashboard Cite

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.

show abstract