Ion hose instability

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August undefined, 2024

WebThe 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

[PDF] The Ion-Hose Instability in a High-Current Multipulse Linear ...

Webhose instability is a purely growing mode, or equivalently, is an aperiodic instability) provided the following condition for the instability is satisfied; The above instability … 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... gramophone record player in home

Using a hybrid-ﬂuid model to simulate the ion-hose instability …

WebThis 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 … 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 (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 … china tickets cheap

A Study of the Ion Hose Instability in the DARHT-II Downstream ...

Electron-hose instability in the ion-focused regime.

WebThis 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... 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 … china ticketsWeb22 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 … gramophone vector

"Webthe ion-hose@11# and the fast beam-ion instability@6#. The ion-hose instability occurs if an electron beam is injected into a plasma, where the beam ﬁeld expels the electrons. A two-stream instability can then develop between the gener-ated plasma channel and the beam. The ion-hose instability is weakened by a solenoid ﬁeld, which produces ... " - Ion hose instability

Ion hose instability

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. WebIon-Hose Instability in Long Pulse Induction Accelerators George J. Caporaso and Jim. F. McCarrick Lawrence Livermore National Laboratory, Livermore, California 94550 USA Abstract The ion-hose (or fast-ion) instability sets limits on the allowable vacuum in a long-pulse, high current accelerator.

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WebThe 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 … 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.

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 ... Web11 nov. 2004 · A Study of the Ion Hose Instability in the DARHT-II Downstream Transport Region (Technical Report) OSTI.GOV skip to main content Sign In Create Account …

WebThe ion-hose instability is not a threat in the downstream system. Figure 4: The number of e-folding growth for a tickler excitation of the ion-hose instability varies with the envelope variation parameter µ and the fractional ion frequency spread δ. 4 KICKER SWITCHING AND SPOT SIZE DILUTION The DARHT-II kicker uses a modulated, solid-state Web18 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 …

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 …

WebThe ion-hose instability is a transverse electrostatic instability which occurs on electron beams in the presence of a low-density ion channel. It is a phenomenon quite similar … china tickets price from nycWebComputer simulations of the ion-hose effect typically use Particle-In-Cell (PIC) computer codes or codes using the spread-mass model. PIC simulations, though offering more … gramophone youtubeWeb29 mei 1992 · The conditions, when as a result of ion-hose instability development may be coming out of the channel by beam tail, were founded. It was showed, that suplementary creation of plasma by electron beam and ions did not … gramophone records pricesWebAn electron beam focused by an ion channel without a magnetic field, in the so-called ion focus regime (IFR), may be disrupted by the transverse ion hose instability. We … gramophone recording of the yearThe 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 … chinati court cedar parkWeb18 okt. 2004 · ABSTRACT. The growth and saturation of the ion-hose instability in an applied axial magnetic field is examined. This dipole streaming instability is an … gramophone vinyleWebA 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). gramophone replica