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Streamer discharges are the primary mode of electric breakdown of air in lightning and high voltage technology. Streamer channels branch many times, which determines the developing tree-like discharge structure. Understanding these branched…

Neutron tunneling between neutron-rich nuclei in inhomogeneous dense matter encountered in neutron star crusts can release enormous energy on a short-timescale to power explosive phenomena in neutron stars. In this work we clarify aspects…

Nuclear Theory · Physics 2021-05-19 Carlos A. Bertulani , Ronaldo V. Lobato

In this paper, the author brings further details regarding his Lightning Ball observation that were not mentioned in the first one (Ref.1-2). Additionally, he goes more into detail as the three forces that are necessary to allow the…

General Physics · Physics 2009-10-13 Domokos Tar

Topological defects, particularly cosmic strings, can provide a mechanism to produce particles with energies of the order 10^21 eV and higher. Here, we report on order of magnitude calculations of fluxes from a cosmic string network which…

High Energy Physics - Phenomenology · Physics 2007-05-23 U. F. Wichoski , R. H. Brandenberger , J. H. MacGibbon

We investigate wind tunnel turbulence generated by both conventional and multi-scale grids. Measurements were made in a tunnel which has a large test-section, so that possible side wall effects are very small and the length assures that the…

Fluid Dynamics · Physics 2017-05-24 Per-Åge Krogstad , Peter Davidson

We present a comprehensive theory on the formation of ball lightning, a luminous sphere sometimes observed after normal lightning. In a ball lightning event, a relativistic electron bunch can be produced by the stepped leader of lightning…

Plasma Physics · Physics 2016-08-24 H. -C. Wu

In this paper, we propose a new theory on tornadogenesis from the perspective of vortex tubes based on Kelvin-Helmholtz Theorems. When the pressure difference between the lowest pressure line from the wall cloud down to the ground and its…

Fluid Dynamics · Physics 2025-06-24 Peng Yue , Y. Charles Li , Jiamin Dang , Leigh Orf , Grace Yan

Ball lightning is an impressive natural electromagnetic phenomenon occurring in atmosphere under suitable circumstances. Its origin, composition and stability issues are a matter of debate, due to presence of many evidences still…

General Physics · Physics 2018-06-15 Daniele Funaro

An electron beam passing through a tube which is lined on the inside with a dielectric layer will radiate energy in the THz range due to the interaction with the boundary. The resonant enhancement of certain frequencies is conditioned by…

Accelerator Physics · Physics 2020-05-13 Klaus Floettmann , Francois Lemery , Martin Dohlus , Michaela Marx , Mikayel Ivanyan , Vasili Tsakanov

The phenomenon of fully coherent energy loss (FCEL) in the collisions of protons on light ions affects the physics of cosmic ray air showers. As an illustration, we address two closely related observables: hadron production in forthcoming…

High Energy Physics - Phenomenology · Physics 2022-11-09 François Arleo , Greg Jackson , Stéphane Peigné

Relativistic, charged particles present in extensive air showers lead to a coherent emission of radio pulses which are measured to identify the shower initiating high-energy cosmic rays. Especially during thunderstorms, there are additional…

Nuclear Coulomb potential at completely ionized and extremely thin atmosphere can leaks to a macroscopic spatial scale. This effect is used to explain the difference between the energy spectra of cosmic-ray electrons around $1 TeV$ measured…

High Energy Astrophysical Phenomena · Physics 2019-09-12 Wei Zhu , Jianhong Ruan , Peng Liu , Lei Feng , Fan Wang

Low frequency electromagnetic turbulence is generated in relativistically outflowing plasma that sweeps up particles from the surrounding environment. Electrons are energized by stochastic gyroresonant acceleration with the turbulence…

Astrophysics · Physics 2007-05-23 R. Schlickeiser , C. D. Dermer

During thunderstorms on 2008 September 20, a simultaneous detection of gamma rays and electrons was made at a mountain observatory in Japan located 2770 m above sea level. Both emissions, lasting 90 seconds, were associated with…

Lightning discharge is a complicated process with relevant physical scales spanning many orders of magnitude. In an effort to understand the electrodynamics of lightning and connect physical properties of the channel to observed behavior,…

Space Physics · Physics 2016-05-31 B. E. Carlson , C. Liang , P. Bitzer , H. Christian

Gamma Ray Bursts (GRBs) are notorious for their diversity. Yet, they have a series of common features. The typical energy of their $\gamma$ rays is a fraction of an MeV. The energy distributions are well described by a ``Band spectrum'',…

Astrophysics · Physics 2009-11-10 Arnon Dar , A. De Rujula

Neutron tunneling in neutron star crusts can release enormous amounts of energy on a short timescale. We have clarified aspects of this process occurring in the outer crust regions of neutron stars when oscillations or cataclysmic events…

High Energy Astrophysical Phenomena · Physics 2022-10-19 C. A. Bertulani , R. V. Lobato

We discuss average properties of the gluon cascade generated by an energetic parton propagating through a dense QCD medium. The cascade is mostly made with relatively soft gluons, whose production is not suppressed by the LPM effect. Unlike…

High Energy Physics - Phenomenology · Physics 2013-05-31 Edmond Iancu

The anticorrelated distributions of temperature and density of protons are a well-known property of the solar wind. Nevertheless, it is unclear till now if they are formed by some kind of the universal physical mechanism? Unfortunately, a…

Solar and Stellar Astrophysics · Physics 2023-02-27 Yu. V. Dumin , A. T. Lukashenko , L. M. Svirskaya

Adopting the convection-diffusion model for energetic electron and proton propagation, and accounting for all the relevant hadronic and leptonic processes, the steady-state energy distributions of these particles in the starburst galaxies…

High Energy Astrophysical Phenomena · Physics 2022-03-02 Massimo Persic , Yoel Rephaeli