Ion hose instability

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 Web16 mei 2024 · instability know as the electron hose instability. The linear theory of electron-hose instability in a uniform ion column predicts that for the parameters of the E157 experiment (beam charge, bunch length, and plasma density) a growth of the centroid offset should occur. Analysis of the E157 data has provided four critical results. The

Stable electron beam propagation in a plasma column

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 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 … i m your everything https://marinercontainer.com

Downstream System for The Second Axis of The DARHT Facility

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 … 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 … Web29 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 … i much look forward

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

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Ion hose instability

Hosing Instability of the Drive Electron Beam in the E157 Plasma ...

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 … WebAn 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 …

Ion hose instability

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Web4 apr. 2024 · 2. Source term S = − ( ρ − J z, p) (black lines) as assumed in the model and resulting focusing field (blue lines) in a plasma column (solid lines) and a homogeneous plasma (dashed lines). In a plasma column with a radius Rp smaller than the blowout radius Rb, the focusing field is reduced at the blowout radius. PPT. 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 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 Web19 aug. 1991 · The asymptotic growth of beam-centroid oscillations is computed, and the growth length is found to be very rapid, indeed much less than the betatron period of the beam. A relativistic electron beam propagating through an ummagnetized, underdense plasma exhibits a transverse instability due to the coupling of the beam centroid to …

WebComputer 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 … Web18 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 …

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 …

Web2 aug. 2000 · The 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 … dutch comfortWebThe 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. dutch comedy moviesWeb29 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 … dutch comfort lineWebThe 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 … i much fear trouble in the fuselage frederickWebA 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). dutch comic con 2017 aftermovieWebA formulation of the equation for the relativistic electron beam centroid dynamics in the case of a ion hose instability for the situation of the beam propagating in the ion plasma channel in gas — plasma rarefied background (ion focused regime) is derived. It is assumed that this instability are investigated in the linear stage only. dutch comfy bean bag xxlWebThis 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 … i miss you so very much