Experimental observation of ion hose instability

O’Brien, K. J.; Kamin, G.; Lockner, T.R.; Wagner, J.S.; Shokair, I.R.; Kiekel, P. D.; Molina, I.; Armistead, D.J.; Hogeland, S.; Powell, E. T.; Lipinski, R.J.

doi:10.1103/physrevlett.60.1278

Cited by 20 publications

(6 citation statements)

References 7 publications

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“…This instability is similar in function to the resistive hose instability [4,5], and early analyses of it were based on similar theory [6,7]. This instability was first experimentally observed in 1986 at the Naval Surface Warfare Center (White Oak) [8] and later at Sandia National Laboratories in 1988 [9], and the growth of this instability had been accurately measured in a recirculating induction accelerator by 1990 [10]. Closely related mechanisms have also been suggested as possible limitations in future linear colliders, known as the fast ionbeam instability [11,12], and observed in storage rings, known there as the e-p instability [13,14].…”

Section: Introductionmentioning

confidence: 52%

Using a hybrid-fluid model to simulate the ion-hose instability in long-pulse electron linacs

Carlsten

2005

Phys. Rev. ST Accel. Beams

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A numerical model of the ion-hose instability for long-pulse electron linacs is presented, where the ion motion is represented by fluid parameters. In order to gain extra numerical stability, the fluid behavior of the ions is evolved via particle-in-cell (PIC) techniques. This methodology provides a much faster simulation than a full PIC calculation, allowing for end-to-end simulations of the ion-hose instability in actual linear accelerator configurations. After the description of the simulation model and some simple test cases, the instability is analyzed for a variety of nominal accelerator transport conditions. Simulations of the instability are provided for sections of the DARHT long-pulse accelerator that show different growth regimes of the instability. We find that large-amplitude growth is possible in accelerator and transport regions lacking uniform external focusing, for electron pulse lengths of 2 sec and longer.

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Section: Introductionmentioning

confidence: 52%

Using a hybrid-fluid model to simulate the ion-hose instability in long-pulse electron linacs

Carlsten

2005

Phys. Rev. ST Accel. Beams

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“…When v b 0, Eq. (1) describes the "ion hose" instability of an electron beam focused by an ion channel [12][13][14][15]. In an electron storage ring, where ion effects are a perturbation to the betatron motion in applied magnetic fields, we instead have v b ¿ v e ͑T͒.…”

Section: Single Bounce Frequencymentioning

confidence: 98%

Spread-frequency model of the fast beam-ion instability in an electron storage ring

Bosch

2000

Phys. Rev. ST Accel. Beams

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When a gap in the electron bunch train prevents the trapping of ions, a transverse electron-ion instability may result from the ions created and lost during a single passage of the bunch train. A spread-frequency model is used to study this instability when the ions have a broad distribution of natural oscillation frequencies about the center of the electron beam. A growing disturbance saturates from Balakin-Novokhatsky-Smirnov damping at approximately the same time, and with the same total growth, as in the case without an ion frequency spread. At the tail of the bunch train, an unstable disturbance is amplified by a factor ϳ exp͑v i t b ͒ before saturation occurs, where v i is a typical ion oscillation frequency and t b is the duration of the bunch train. Initially, the instability displays exponential growth in time, unlike the case where the ion-frequency spread is neglected. For a broad distribution of ion frequencies, instability may be prevented by a betatron damping rate that exceeds the incoherent betatron frequency shift induced by ions at the tail of the bunch train.

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“…Hose instabilities were first observed with long pulse electron beams ( s b µ τ 1 ≥ .) Stable beam transport was shown to be disrupted by the ion-hose instability [15]. For such long pulses, the ions are mobile and a feedback occurs between the displaced electrons and ions.…”

Section: What Is the Hosing Instability?mentioning

confidence: 99%

Hosing Instability of the Drive Electron Beam in the E157 Plasma-Wakefield Acceleration Experiment at the Stanford Linear Accelerator

Blue¹

2005

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Experimental observation of ion hose instability

Cited by 20 publications

References 7 publications

Using a hybrid-fluid model to simulate the ion-hose instability in long-pulse electron linacs

Using a hybrid-fluid model to simulate the ion-hose instability in long-pulse electron linacs

Spread-frequency model of the fast beam-ion instability in an electron storage ring

Hosing Instability of the Drive Electron Beam in the E157 Plasma-Wakefield Acceleration Experiment at the Stanford Linear Accelerator

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