Ion hose instability
Web7 okt. 2024 · The ion-hose instability is considered to be a potential danger for long-pulse, high-current electron linear induction accelerators (LIAs). As is shown in this The Ion … WebThe ion hose instability, which can seriously disrupt an IREB propagating in a focusing ion channel, is studied for the charge neutral Bennett-pinched beam. A rigid beam approximation predicts that the instability occurs in the long wavelength region, has a strong resonant growth, and has features of an absolute instability.
Ion hose instability
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WebIn order to support commissioning experiments in the DARHT-II induction linac at Los Alamos National Laboratory, a spreadmass code is improved so that the parameter space for the experiment can be surveyed quickly. Computer simulations of the ion-hose effect typically use Particle-In-Cell (PIC) computer codes or codes using the spread-mass … Web22 jun. 2001 · Abstract: The ion-hose instability is a transverse electrostatic instability which occurs on electron beams in the presence of a low-density ion channel. In the …
WebThe ion-hose instability has been identified as a key limiting factor in long-pulse electron induction linacs [1– 3]. This instability is well known, and has been studied in detail for electron beams in induction linacs operating in the ion-focusing regime (IFR). This instability is similar in function to the resistive hose instability [4,5 ... Web1 apr. 1997 · A relativistic electron beam magnetically self-focused in a plasma is subject to an electrostatic hose instability. A linear theory of hose growth is formulated taking into account nonlinear...
WebA relativistic electron beam, propagating in an underdense ion‐focusing channel that is embedded within a broad region of underdense plasma, is shown to be subject to a hose instability due to coupling with plasma electrons at the edge of the pure‐ion region. The instability is studied by means of linearized analytic calculations of dispersion relations … WebThe growth and saturation of the ion-hose instability in an applied axial magnetic field is examined. This dipole streaming instability is an important factor in determining the time …
Web1 jun. 1993 · The growth rate of the ion-hose instability has been measured for a 2.5 MeV, 1 kA, 1 {mu}sec electron beam following plasma channels of O{sub 2}, N{sub 2}, and …
WebThe ion-hose instability is considered to be a potential danger for long-pulse, high-current electron linear induction accelerators (LIAs). As is shown in this paper, it is also a concern for multipulse LIAs. simplicity\u0027s usThe 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 perpendicular to its long axis. After the instability has run its course, the galaxy is less elongated (i.e. rounder) than before. Any sufficiently thin stellar system, in which some component of the internal velocity is in the form … simplicity\\u0027s uwWebThe ion-hose instability growth between the accelerator and the septum quad is small, even without the strong Proceedings of 2005 Particle Accelerator Conference, Knoxville, Tennessee 0-7803-8859-3/05/$20.00 c2005 IEEE 376. solenoidal magnetic field as in the accelerator, because raymond island accommodation victoriaWebThe ion-hose (or fast-ion) instability sets limits on the allowable vacuum in a long-pulse, high current accelerator. Beam-induced ionization of the background gas leads … simplicity\u0027s uvWebA Plasma instability is a region where turbulence occurs due to changes in the characteristics of a plasma (eg. temperature, density, electric fields, magneti fields). As the name suggests, instabilities are unstable, though they may appear to evolve through different forms (morphology). raymond island ferry timesWeb18 jul. 2024 · This instability is a direct result of beam-electron ionization of residual background gas, and the growth rate is proportional to the ion density. In a typical accelerator vacuum, there is little ion density decay between beam pulses, and the … raymond island accommodationWebThe paper is organized as follows: in Section 2 we present linear theory predictions of the parallel fire hose, focussing in particular on the differences between proton and alpha contributions in driving the instability and the influence of a velocity drift between the species; in Section 3 we discuss the feedback of the instability on the plasma, deriving … simplicity\u0027s uw