OICC PRESS Effects of mixed electric field on characterization of electrohydrodynamics drying system Volume 16 (2022) Issue 1, March 2022 2022 12 11 Effects of mixed electric field on characterization of electrohydrodynamics drying system 10.30495/jtap.162201 EN Amir Abbas Heidari Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran 0000-0001-9802-7487 Pourya Seyfi Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran 1983963113, Iran Ahmad Khademi Laser and Plasma research institute, Shahid Beheshti University, Tehran, Iran 0000-0002-0411-6444 Hamid Ghomi Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran 1983963113, Iran 0000-0003-2203-5194 Journal Article 2022 12 11 In this paper, we present a new structure of applying two electrical power supplies to generate ionic wind. In this configuration, two power supplies were applied simultaneously with a modulated voltage to an electrohydrodynamic (EHD) system then corona discharge parameters and EHD thrust characterization was investigated by a corona dryer mechanism. The EHD thrust experiments were performed with a pin to plate and SDBD arrangements. The results show that with the simultaneous application of two power supplies the drying rate in a drop of water as a standard sample was greatly enhanced and the drying time was reduced. Thus, the total evaporation was occurred in 1 minute in the SDBD structure with a power of 7 watts and in 1.5 minutes in pin to plate structure with a power of 2.5 watts. Eventually, it was observed that the use of mixed electric fields enhances the ionic wind, hence increases the non-thermal evaporation process significantly. Furthermore, the drying rate has grown notably In SDBD configuration.

OICC PRESS Synthesis structural and anti-microbial characterization of nanostructured doped tin oxide Volume 16 (2022) Issue 1, March 2022 2022 12 09 Synthesis structural and anti-microbial characterization of nanostructured doped tin oxide 10.30495/jtap.162202 EN A.M. Roychaudhury Department of Chemistry, Raiganj University, Raiganj, Uttar Dinajpur 733134, India Utsa Debnath Department of Chemistry, Raiganj University, Raiganj, Uttar Dinajpur 733134, India Sujay Munshi Department of Physics, Raiganj University, Raiganj, Uttar Dinajpur 733134, India. Goutam Kumar Basak Department of Microbiology, Raiganj University, Raiganj, Uttar Dinajpur 733134, India Abhigyan Dutta Department of Physics, University of Burdwan, Burdwan, 713 104, India S. Masanta Department of Physics, Bose Institute, 93/1, APC Road, Kolkata 700009, India Achintya Singha Department of Physics, Bose Institute, 93/1, APC Road, Kolkata 700009, India Aritra Banerjee Department of Physics, University of Calcutta, 92 A P C Road, Kolkata-700 009, India Debtanu Ghosh Department of Physics, Vivekananda Mahavidyalaya, Haripal, Hooghly 712405, India Partha Chatterjee Department of Physics, Vivekananda Mahavidyalaya, Haripal, Hooghly 712405, India 0000-0002-7049-3934 Apurba Kanti Deb Department of Physics, Raiganj University, Raiganj, Uttar Dinajpur 733134, India 0000-0001-7033-3044 Journal Article 2022 12 09 Nanocrystalline boron doped tin oxide and boron and silver co-doped SnO2 was successfully prepared by using simple sol-gel method. The structural property of as-prepared nanocrystalline materials was investigated by using X-ray powder diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy and scanning electron microscopy. The infrared spectra of the prepared samples showed an incorporation of B and Ag in the SnO2 nanocrystals. The X-ray powder diffraction pattern of the as prepared sample demonstrated the formation of a rutile structure of SnO2 nanocrystallites with particle size of 35 nm and 98 nm for boron doped and co-doped samples respectively. The two different Sn-O bond distances are found to be varying in a different manner for the doped samples unlike pristine samples. A significant lattice microstrain was observed for co-doped samples indicating local lattice distortion. The prepared samples showed significant anti-microbial activities against some Gram-Positive & Gram-Negative

OICC PRESS Investigation of the Poynting flux ratio in the helix traveling wave tube Volume 16 (2022) Issue 1, March 2022 2022 12 11 Investigation of the Poynting flux ratio in the helix traveling wave tube 10.30495/jtap.162203 EN Mona Mehranfar Plasma Physics Research Centre, Science and Research Branch, Islamic Azad University, Tehran, Iran. Davoud Dorranian Plasma Physics Research Centre, Science and Research Branch, Islamic Azad University, Tehran, Iran 0000-0001-8855-7425 Journal Article 2022 12 11 The study deals with amplification of a propagating slow wave interacting with an annular hollow electron beam in a helix slow wave structure (SWS). The role of thermal plasma density in a ratio of the axial pointing flux in the plasma region is also investigated. This ratio is small for lower plasma densities. The effects of the variations of the hollow electron beam velocity on the normalized growth rate and the poynting flux ratio at the hybrid mode frequency are presented. The maximum gain is obtained in the frequency of hybrid mode and the poynting flux ratio reaches its maximum value at the hybrid mode frequency. Also is analyzed the trend of changes for the normalized growth rate for a different beam velocities. The results show that for all beam velocities the maximum growth rate is for hybrid mode frequencies. The numerical method used in this paper is complex transcendental.

OICC PRESS The interface of FeCrP film with graphene-like BN: electronic, band alignment, and thermoelectric properties Volume 16 (2022) Issue 1, March 2022 2022 12 11 The interface of FeCrP film with graphene-like BN: electronic, band alignment, and thermoelectric properties 10.30495/jtap.162204 EN Mansoure Ilkhani Department of Physics, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran 0000-0002-6830-3169 Journal Article 2022 12 11 Based on the Density Functional Theory (DFT) and Generalized Gradient Approximation (GGA), the structural, electronic, and band alignment properties of the interface of FeCrP film with graphene-like BN (g-BN) were studied. These properties have been investigated at three different distances between FeCrP film and g-BN. In all three mentioned distances, the ground state point and the bulk modulus show that these compounds have the necessary strength to form, and at the distance of 2.7628 ˚A, the compound is more stable than the other two distances. At this interface, the bulk modulus is greater than its values for the pure FeCrP and also the g-BN compounds. In addition, at the FeCrP-BN interface, the emergence of a large magnetic moment of 13.995 μB is found. Based on the mBJ approximation, this interface has a half-metallic characteristic and in the minority spin, it has a direct bandgap of 0.41 eV spin flip. At this interface, the Schottky height was obtained to be about 1.89 eV. It is found that the BN electronic structure is n-type and the ECNLs appearing in this band alignment are close to the Fermi level as donor-like.

OICC PRESS Impact of silica seeding and discharge voltage on plasma parameters at atmospheric pressure Volume 16 (2022) Issue 1, March 2022 2022 12 11 Impact of silica seeding and discharge voltage on plasma parameters at atmospheric pressure 10.30495/jtap.162205 EN Vijay Kumar Jha Central Department of Physics, Kirtipur (Tribhuvan University, Kathmandu), Nepal 0000-0001-7310-1177 Lekha Nath Mishra Patan Multiple Campus, Patandhoka, Lalitpur (Tribhuvan University, Kathmandu), Nepal 0000-0002-3892-4570 Bijoyendra Narayan J. L. College, Hajipur, Vaishali (B. R. A. Bihar University, Muzaffarpur), India Journal Article 2022 12 11 The interaction of cold plasma with heterogeneous catalysts has led to some peculiar behavior, especially with silica (SiO2) seeding in presence of 2% alumina (Al2O3). In this paper, we have measured plasma parameters in low temperature arc plasma. I - V characteristics of Langmuir probes are plotted using the data obtained from the experimental set up for single probe method in arc plasma at atmospheric pressure. It is revealed that the used seed modifies the electron temperature of the plasma appreciably while the temperature of the gas in the surrounding remains almost unchanged. The single probe characteristics have been utilized to measure the electron temperature, floating potential, Debye length and electron density. It is found that electron temperature decreases whereas electron density increases appreciably after seeding the arc plasma. The decrease in electron temperature and increase in electron density to 99.9% are observed after seeding the arc plasma with silica mixture as compared to those before seeding. Variations in plasma parameters such as electron temperature, electron density, plasma frequency and Debye length with discharge voltage are also plotted for the silica seeded arc plasma.

OICC PRESS The generalized representation of Dirac equation in two dimensions Volume 16 (2022) Issue 1, March 2022 2022 12 11 The generalized representation of Dirac equation in two dimensions 10.30495/jtap.162206 EN Hamze Moayeri Physics Department, Science Faculty, Jundi-Shapur University of Technology, Dezful, Iran 0000-0001-5199-4349 Ali Chenani Physics Department, Science Faculty, Jundi-Shapur University of Technology, Dezful, Iran Alireza Hakimifard Physics Department, Science Faculty, Jundi-Shapur University of Technology, Dezful, Iran Nemat Tahmasebi Physics Department, Science Faculty, Jundi-Shapur University of Technology, Dezful, Iran 0000-0002-7214-1684 Journal Article 2022 12 11 Since the discovery of the Dirac equation, much research has been done on the construction of various sets consisting of Dirac matrices that all of which follow the Cliford Algebra. But there is never notice to the relationship between the internal elements of these matrices. In this work, the general form of 2×2 Dirac matrices for 2+1 dimension is found. In order to find this general representation, all relations among the elements of the matrices are found, and the generalized Lorentz transform matrix is also found under the effect of the general representation of Dirac matrices. As we know, the well known equation of Dirac, (iγμ∂μ −m) Ψ = 0, is consist of matrices of even dimension known as the Dirac matrices. Our motivation for this study was lack of the general representation of these matrices despite the fact that more than nine decades have been passed since the discovery of this well known equation. Everyone has used a specific representation of this equation according to their need; such as the standard representation known as Dirac-Pauli Representation, Weyl Representation or Majorana representation. In this work, the general form which these matrices can have is found once for all.

OICC PRESS The Cairns-Tsallis model for ion acoustic cnoidal (periodic) waves Volume 16 (2022) Issue 1, March 2022 2022 12 11 The Cairns-Tsallis model for ion acoustic cnoidal (periodic) waves 10.30495/jtap.162207 EN Forough Farhadkiyaei Physics Department, Islamic Azad Uni., Aligudarz Branch, Aligudarz, Iran 0000-0001-5401-406X Journal Article 2022 12 11 In this paper, considering the importance of ion acoustic waves in nonlinear phenomena of plasma, the combined effects of nonextensivity and nonthermality parameters on the ion acoustic cnoidal nonlinear waves studied. In this regard, the hybrid Cairns-Tsallis distribution function used to describe the electrons and positrons. Conditions of formation of nonlinear ion acoustic waves and permissible values of nonextensivity (Q) and nonthermality (α) parameters were determined and the behavior of these waves with changes in these parameters in this type of plasma have been studied. For this purpose, we have used the reductive perturbation method (RPM) to derive the corresponding KdV equation for the ion acoustic wave, then considering the Sagdeev potential, the conditions for the generation of ion acoustic waves in the cnoidal and soliton form discussed. The effect of nonextensivity (Q) and nonthermality (α) parameters on the Sagdeev potential (potential well width and depth), wave amplitude and frequency investigated. The results show that for all of the acceptable values of Q and α the cnoidal ion acoustic wave is compressive.

OICC PRESS Investigation of the effects of pulse repetition frequency in a mixed electric field on a SDBD-like plasma jet Volume 16 (2022) Issue 1, March 2022 2022 12 11 Investigation of the effects of pulse repetition frequency in a mixed electric field on a SDBD-like plasma jet 10.30495/jtap.162208 EN Amir Abbas Heidari Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran 0000-0001-9802-7487 Pourya Seyfi Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran 1983963113, Iran Ahmad Khademi Laser and Plasma research institute, Shahid Beheshti University, Tehran, Iran 0000-0002-0411-6444 Hamid Ghomi Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran 1983963113, Iran 0000-0003-2203-5194 Journal Article 2022 12 11 In this paper, the design, performance and characterization of a low temperature argon plasma jet with a Surface Dielectric Barrier Discharge (SDBD)-like structure are presented. Based on this structure, the argon plasma jet is generated in a SDBD-like structure with a mixed electric field. SDBD-like structure, refers to the plasma jet generated by the surface dielectric barrier discharge. The effects of high frequency electric pulse as the main igniter for plasma jet generation and low frequency sinusoidal electric field in order to modify the dynamic behavior of plasma jet are investigated in this paper. The effect of these variations on the plasma jet along with the decrease in pulse repetition frequency were recorded by Schlieren imaging method. This study revealed the important role of decreasing the pulse repetition frequency in the mixed electric field in the SDBD-like plasma jet structure. Increasing the cross-sectional area of the plasma colliding with the target surface is the most important advantage of this structure for the generation of plasma jets. Also, the trend of decreasing plasma column continuity with increasing pulse repetition frequency is another result of this study. Under these conditions, the diameter of the cross section of the plasma jet increases to 9 mm without increasing the consumption of more electrical power and with equal jet length. Finally, the surface hydrophilicity was measured after treatment by plasma jet and the operation resulted in a super-hydrophilic surface.

OICC PRESS Damping effects in ^{100}Sn ^{+ 16}O and ^{100}Sn ^{+ 16Ca} collisions Volume 16 (2022) Issue 1, March 2022 2022 12 21 Damping effects in ^{100}Sn ^{+ 16}O and ^{100}Sn ^{+ 16Ca} collisions 10.30495/JTAP.162209 EN Journal Article 2022 12 21 Skyrme Forces (SF) Based Mean Field Model (MFM) or related density function is widely used to describe nuclear states, collective vibrational excitation, and heavy-ion collisions. To investigate 100Sn+16O and 100Sn+48Ca collisions on a 3-dimensional(3D) mesh with Skyrme SV-bas forces in Ecm=100, 150, and 200 MeV, Time-Dependent Hartree-Fock Skyrme(TDHFS) computations were done. The effective interaction in the computation of reaction dynamics as an important role in understanding the dynamics of the reaction provides us with knowledge about the characteristics of heavy-ion reactions' effective interaction. The effect of increasing the ratio of neutrons to protons and the symmetry and asymmetry of the nuclei, as well as the size of the box at different energies, on the structure of the composite core, was investigated. The 100Sn+16O collision time course findings reveal that the continuous dampening effect remains after the fusion process. The damping mechanism has been demonstrated to be connected to breaking the dependency on box size, which is like the twisted average boundary condition that may avoid box size impacts on the 3D coordinate space employed, whereas periodic boundary conditions are seen for 100Sn +48Ca.

OICC PRESS Synthesis of titanium-silver bimetallic nanoparticles by thermal plasma method Volume 16 (2022) Issue 1, March 2022 2022 12 11 Synthesis of titanium-silver bimetallic nanoparticles by thermal plasma method 10.30495/jtap.162210 EN Sahar Shehni Plasma physics research center, Science and research branch, Islamic Azad University, Tehran, Iran Shahrooz Saviz Plasma physics research center, Science and research branch, Islamic Azad University, Tehran, Iran 0000-0001-5874-3761 Amir Hosein Sari Plasma physics research center, Science and research branch, Islamic Azad University, Tehran, Iran Journal Article 2022 12 11 In the present paper, the micron-size silver and titanium powder with desired weight ratios is used to produce the silver-titanium nanocomposite using the self-developed thermal plasma equipment. The mixture is fed into the plasma torch flame by the powder feed system and argon carrier gas. After evaporation, the particles are cooled inside the cooling chamber and collected from the surface of the water-cooled double-walled chamber. The production of Titanium-Silver bimetallic nanoparticles is achieved in two ways: the cooling chamber is once filled with argon and once with atmospheric air. The nanoparticles are analyzed using scanning electron microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDS), and X-ray Diffraction (XRD) methods to identify the nanoparticle size distribution, morphology and chemical composition properties. The morphology of the produced nanocomposites is spherical and their average size is 30 nm. The results indicate that the average size of nanoparticles produced in the presence of air is smaller than those in the presence of argon.