Firehose instability
WebA brief analysis of the proton parallel and oblique firehose instability is presented from a fluid perspective and the results are compared to kinetic theory solutions obtained by the WHAMP code. It is shown that the c… WebDec 2, 2024 · The present study highlights the role of proton firehose instability in defining parallel temperatures of protons. Considering reality, we chose a bi-Maxwellian model for …
Firehose instability
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WebAt maximum growth, the non-propagating electron firehose instability has k ∼ 1/d e. The non-propagating electron firehose has a significantly lower threshold than the propagating electron firehose instability under typical solar-wind conditions (Gary and Nishimura, 2003; Lazar et al., 2024). WebIt is revealed that the firehose instability is mainly controlled by the shock strength with little influence of the shock angle contrary to the mirror instability for which both parameters intervene. We confirm results showing that the heliosheath plasma observed by Voyager 1 immediately behind the termination shock is mirror unstable. Similar ...
WebFeb 9, 2024 · We demonstrate using linear theory and particle-in-cell (PIC) simulations that a synchrotron-cooling collisionless plasma acquires pressure anisotropy and, if … WebThe firehose instability (or hose-pipe instability) is a dynamical instability of thin or elongated galaxies. The instability causes the galaxy to buckle or bend in a direction …
WebYet, the electron firehose instability and its role in the reconnection process is still rather unexplored, especially with in situ measurements. We report MMS observations of … WebApr 7, 2024 · The "hard" firehose instability threshold obtained from the CGL model is equivalent to the one found from linear kinetic theory, which is well known (Abraham-Shrauner 1967; Ferrière & André 2002 and references therein). The parallel firehose instability is usually a propagating instability (i.e., has a nonzero real frequency) and …
WebApr 13, 2024 · Energy conversion via reconnecting current sheets is common in space and astrophysical plasmas. Frequently, current sheets disrupt at multiple reconnection sites, …
WebMar 15, 2024 · The investigation of 2D spectral properties associated with the time-evolving instability shows that the firehose instability progressively takes on the field-aligned, or parallel characteristics, thus obliquity is being reduced. This trend is common to both bi-Kappa and bi-Maxwellian electrons. The particle distribution function exhibits ... state of ny sos business searchWebMay 4, 2024 · Firehose-like instabilities (FIs) are cited in multiple astrophysical applications. Of particular interest are the kinetic manifestations in weakly-collisional or even collisionless plasmas, where these instabilities are expected to contribute to the evolution of macroscopic parameters. Relatively recent studies have initiated a realistic description of FIs, as … state of ny retirement systemWebIt is revealed that the firehose instability is mainly controlled by the shock strength with little influence of the shock angle contrary to the mirror instability for which both parameters … state of ny missing moneyWebSep 12, 2002 · [1] The proton resonant firehose instability may arise in collisionless plasmas in which the proton velocity distribution is approximately bi-Maxwellian with T ∥p /T ⊥p > 1, where ⊥ and ∥ denote directions relative to the background magnetic field B .Linear theory and one-dimensional simulations predict that enhanced field fluctuations from the … state of ny real estate license lookupWebJun 30, 2024 · where k is the modulus of the wave vector and θ is the angle between the wave vector and the unperturbed magnetic field.. From the general solutions (1) and (2), we obtain solutions for the firehose instability caused by beam pressure. Let us consider low-pressure magnetized plasma in which a high-speed proton beam propagates along a … state of ny taxWebNov 17, 2024 · The probability of reaching firehose unstable condition tends to be larger for the faster fast flow. The Pi1/2-band MWAs tend to be larger as the probability of the firehose unstable condition near the neutral sheet is larger for the fast flows with a certain average velocity near the neutral sheet, although they have a weak relationship. state of ny short term disabilityWebMar 15, 2024 · The investigation of 2D spectral properties associated with the time-evolving instability shows that the firehose instability progressively takes on the field-aligned, or … state of ny std