Bulletin of the American Physical Society
75th Annual Gaseous Electronics Conference
Volume 67, Number 9
Monday–Friday, October 3–7, 2022;
Sendai International Center, Sendai, Japan
The session times in this program are intended for Japan Standard Time zone in Tokyo, Japan (GMT+9)
Session DF4: Fundamental Processes |
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Chair: Ahmed Hala, Gaseous Electronics, LLC Room: Sendai International Center Tachibana |
Friday, October 7, 2022 4:00PM - 4:15PM |
DF4.00001: Dressed ion acoustic solitons with electron beam in Earth’s magnetosphere Sunidhi Singla, N. S. Saini The nonlinear aspects of Ion acoustic soliton (IASs) dynamics in electron-ion plasma in the presence of an electron beam have been extensively studied as a result of the vital importance in astrophysical sciences mainly Earth’s magnetospheric region. The study of the nonlinear wave propagation in electron-ion (e-i) plasmas is useful in understanding the dynamical behavior of plasma in astrophysical environments. In the Earth’s magnetosphere plasma system, there is always a possibility of its interaction with highly intense charged particle beam coming from outer space. Moreover, the behavior of ion acoustic solitary waves propagating in e-i plasma model is strongly dependent on the ion to electron temperature ratio, beam density ratio, and electron beam parameters. Moreover, it is found that the inclusion of the higher-order corrections results in creating new type of solitons, called humped IASs. The ion number density play important role in the basic features of the produced IASs and the associated electric fields. Based on all such observations, our brief communication has heralded a model of e-i plasma to know the various effects of an electron beam on plasma dynamics. |
Friday, October 7, 2022 4:15PM - 4:30PM |
DF4.00002: Reconfigurable Mode coupling between Bragg and Surface Plasmon Modes in Super Three-dimensional Microplasma Photonic Crystals Xinhang Song, Wenyuan Chen, Peter Sun, J. Gary Eden Super three-dimensional (s3D) microplasma photonic crystals have been designed and realized at the University of Illinois. Such s3D microplasma photonic crystals have periodicity in all three dimensions where each capillary can be filled with different materials such as metallic, dielectric, and plasma elements, so numerous possible configurations are allowed in such s3D photonic structures. In this work, a dynamic mode-splitting phenomenon is shown in a metallic waveguide-resonator structure built in the microplasma photonic crystal, then a theoretical calculation is given based on the coupled-mode theory. This is beyond the recent report [1]. |
Friday, October 7, 2022 4:30PM - 4:45PM |
DF4.00003: Effect of Preheating Temperature of Al2O3 on Reduction Ratio by Laser Diode Ablation under Hydrogen Atmosphere Kanta Ishiguro, Ryohei Oishi, Makoto Matsui Today, interest in permanent lunar exploration, such as the Artemis plan, is growing in anticipation of future Mars exploration. In this case, the construction of a lunar base based on ISRU is important due to the high cost of material transportation from the earth. In this study, a 1 kW-class laser diode was used to ablate Al2O3, which is abundant in the lunar regolith, and reduce it to aluminum in a hydrogen atmosphere. In a previous study, the plume temperature decreased by about 400 K compared to that of the argon-filled plume due to the energy consumed by hydrogen dissociation under hydrogen-filled conditions. Therefore, we attempted to raise the plume temperature by preheating Al2O3 to a higher temperature even with the hydrogen atmosphere. |
Friday, October 7, 2022 4:45PM - 5:00PM |
DF4.00004: KP Burgers equation in Beam Plasma with Non-Maxwellian Electrons Manveet Kaur, N.S. Saini, Sunidhi Singla Many investigations of nonlinear evolution equations such as Korteweg-de Vries (KdV), modified KdV (mKdV), Kadomstev–Perviashvili (KP), mKP and Zakharov–Kuznetsov (ZK) have been reported for the study of nonlinear propagation of electrostatic excitations in different kinds of space and laboratory plasma environments in the framework of various particle velocity distributions. It is believed that the transverse perturbations always exist in the higher-dimensional system. Due to presence of energetic charged particles in any given plasma system significantly modifies the propagation properties of different nonlinear structures. In present paper, we have studied the propagation properties of ion acoustic solitary and shock waves in an unmagnetized ion-beam plasma with electrons featuring (r,q) distribution. The reductive perturbation method has been employed to derive the KP Burgers (KPB) equation and by employing the tangent hyperbolic method, the travelling wave solution has been acquired. It is observed that different plasma parameters crucially modify the characteristics of IA solitary and shock structures. The findings may be useful in understanding the insight into the physics of nonlinear structures in the polar cap region. |
Friday, October 7, 2022 5:00PM - 5:15PM |
DF4.00005: Study of the effect of a longitudinal magnetic field on streamer properties following Juno’s observation of possible transient luminous events on Jupiter Reza Janalizadeh, Victor P Pasko Giles et al. [J. Geophys. Res., 125, e2020JE006659, 2020] reported the first observation of possible lightning-induced transient luminous events (TLEs) at ~250 km altitude in Jupiter’s ionosphere by the Juno spacecraft. Whereas TLEs on Jupiter were predicted by Yair et al. [J. Geophys. Res., 114, E09002, 2009], the modeling of sprite streamers, which are the brightest TLE, on Jupiter is absent from the literature. Here we demonstrate that due to Jupiter’s strong magnetic field [Connerney et al., Geophys. Res. Lett., 45, 2590-2596, 2018] ionospheric electrons at the altitude mentioned above are magnetized. Subsequently, we discuss the effect of magnetic field on the electron energy distribution function, and use BOLSIG+ [Hagelaar and Pitchford, Plasma Sources Sci. Technol. 14, 722-733, 2005] to account for this effect on electron transport coefficients and electron-neutral collisional rates. We also study the photoionization process, which is necessary for inception of positive streamers, in a low pressure 88% H2, 12% helium mixture. Streamer initiation and propagation in Jupiter’s atmosphere is studied using a plasma fluid model. Specifically, the self-focusing effect of streamers reported in [Starikovskiy et al., Phys. Rev. E, 103, 063201, 2021] is reproduced. Furthermore, it is demonstrated that presence of the magnetic field increases the emission intensity of the streamer by an order of magnitude. |
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