Energy spectra of Penning electrons in non-local plasma at middle and high pressures

Stefanova, M.; Pramatarov, P. M.; Kudryavtsev, A. A.; Peyeva, Rumiana

doi:10.1088/1742-6596/514/1/012052

Cited by 13 publications

(9 citation statements)

References 6 publications

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“…The peaks due to Penning electrons, released in the reactions of metastable helium atoms with argon atoms (13) and (14), clearly stand out above the continuous spectrum at about 4.06 and 4.85 eV, as well as in the measured EEDF in Ref. 7. The peaks in the EEDF indicate the energies of the Penning electrons, from which, given the excitation energy of the working gas atoms and the ionization energy of the impurity atoms, the sort of the impurity can be obviously identified.…”

Section: Application Of the Code To The Plasma Electron Spectrosmentioning

confidence: 65%

“…Computed results are consistent with those obtained in the experiments. [7][8][9][10] Indeed, computed EEDF revealed sharp peaks exactly at the release energies of the electrons, emerged in the Penning reactions.…”

Section: Discussionmentioning

confidence: 97%

“…In the present work, we carried out 1d3v parallel PIC/ MCC analysis of glow discharge plasma in the mixture of helium and argon, related to the problem of identification of impurities in the gas within the PLES method. [6][7][8][9][10] Description of the PIC/MCC model is given in Section II A. The verification of the numerical code is done in Section II B.…”

Section: For Details)mentioning

confidence: 99%

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Particle in cell/Monte Carlo collision analysis of the problem of identification of impurities in the gas by the plasma electron spectroscopy method

2016

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The work deals with the Particle in Cell/Monte Carlo Collision (PIC/MCC) analysis of the problem of detection and identification of impurities in the nonlocal plasma of gas discharge using the Plasma Electron Spectroscopy (PLES) method. For this purpose, 1d3v PIC/MCC code for numerical simulation of glow discharge with nonlocal electron energy distribution function is developed. The elastic, excitation, and ionization collisions between electron-neutral pairs and isotropic scattering and charge exchange collisions between ion-neutral pairs and Penning ionizations are taken into account. Applicability of the numerical code is verified under the Radio-Frequency capacitively coupled discharge conditions. The efficiency of the code is increased by its parallelization using Open Message Passing Interface. As a demonstration of the PLES method, parallel PIC/ MCC code is applied to the direct current glow discharge in helium doped with a small amount of argon. Numerical results are consistent with the theoretical analysis of formation of nonlocal EEDF and existing experimental data.

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Section: Application Of the Code To The Plasma Electron Spectrosmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 97%

Section: For Details)mentioning

confidence: 99%

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Particle in cell/Monte Carlo collision analysis of the problem of identification of impurities in the gas by the plasma electron spectroscopy method

2016

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“…Plasma electron spectroscopy (PLES) is one of the most promising novel methods [6][7][8][9][10][11][12][13][14][15][16]. The PLES method for analysis of impurities in the gas phase is based on measurements in a nonlocal gas-discharge plasma of the energy spectra of electrons in the Penning ionization reactions of atoms and molecules of an impurity A by metastable atoms of a buffer inert gas B * :…”

Section: Introductionmentioning

confidence: 99%

“…To date, detection by the PLES method has been demonstrated for impurities of various atomic and molecular inorganic substances, including inert gases (Ar, Kr), metals (Pt), molecular atmosphere (N 2 , O 2 ), as well as CO, CO 2 , CH 4 , C 2 H 4 , and NH 3 [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Determination of organic impurities by plasma electron spectroscopy in nonlocal plasma at intermediate and high pressures

Chen¹,

Yao²,

Saifutdinov³

et al. 2022

Plasma Sources Sci. Technol.

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This study aims to improve the impurity analysis by plasma electron spectroscopy for organic molecules. Because the appearance energies of the characteristic Penning electrons vary for different chemical compounds, various impurities can be registered simultaneously in one measurement. Herein, experimental studies were conducted on helium with alcohol vapor impurities in a nonlocal negative glow plasma of a short glow micro-discharge with an increase in pressure from 15 Torr to 150 Torr. Thus, the pressure could be increased to atmospheric pressure, eliminating the need for expensive and cumbersome gas pumping systems.

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Use of dc Ar microdischarge with nonlocal plasma for identification of metal samples

Kudryavtsev

Stefanova

Pramatarov

2015

Journal of Applied Physics

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The possibility of using the collisional electron spectroscopy (CES) method for the detection of atoms from metal samples is experimentally verified. The detection and identification of metal atoms from a Pt sample in the nonlocal plasma of short (without positive column) dc Ar microdischarge at intermediate pressures (5–30 Torr) is realized in this work. Cathode sputtering is used for atomization of the metal under analysis. The identification of the analyzed metal is made from the energy spectra of groups of fast nonlocal electrons—characteristic electrons released in the Penning ionization of the Pt atoms by Ar metastable atoms and molecules. The acquisition of the electron energy spectra is performed using an additional electrode—a sensor located at the boundary of the discharge volume. The Pt characteristic Penning electrons form the maxima in the electron energy spectra at the energies of their appearance, which are 2.6 eV and 1.4 eV. From the measured energy of the maxima, identification of the metal atoms is accomplished. The characteristic Ar maxima due to pair collisions between Ar metastable atoms and molecules and super-elastic collisions are also recorded. This study demonstrates the possibility of creating a novel microplasma analyzer for atoms from metal samples.

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Energy spectra of Penning electrons in non-local plasma at middle and high pressures

Cited by 13 publications

References 6 publications

Particle in cell/Monte Carlo collision analysis of the problem of identification of impurities in the gas by the plasma electron spectroscopy method

Particle in cell/Monte Carlo collision analysis of the problem of identification of impurities in the gas by the plasma electron spectroscopy method

Determination of organic impurities by plasma electron spectroscopy in nonlocal plasma at intermediate and high pressures

Use of dc Ar microdischarge with nonlocal plasma for identification of metal samples

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