Ion hose instability

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August undefined, 2024

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 in a long-pulse linear induction accelerator

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 … 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 small black leather cushion

Fire Hose instability driven by alpha particle temperature …

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 … Web1 jun. 1993 · The hose instability, which is seeded by initial transverse beam and/or plasma phase space asymmetries, is growing rapidly due to the extreme transverse fields, which can be on the same order... 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 … sol plaatje university pictures

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

Electron beam transport IEEE Conference Publication IEEE Xplore

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 … 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 … small black leather coach purseWebThis 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 … solplanet asw 3000-s

"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. " - Ion hose instability

Ion hose instability

(Color) Schematic of DARHT-2 accelerator. - ResearchGate

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... WebThe ion hose instability in the ion‐focused regime is analyzed using a rigid beam model with phenomenological damping terms. Values of the instability wavelength, e‐folding …

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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 … The 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 …

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... WebThe ion- hose instability is a transverse electrostatic instability which occurs as a result of the interaction between the beam and the ion channel transverse motions.

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 … Web19 mrt. 2003 · The 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 …

WebA 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.

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 … solplanet asw 2000 s-sWebThe 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 solplanet asw15k-lt-g2-pro 3p 2 mppt wifiWebThe 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 ... solplanet asw 6000WebThe 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 … small black leather cross body bagWeb7 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 … sol planner downloadWeb4 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. solplast maceioWeb18 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 … sol plaatjie university online applications