Wakefield decay in a radially bounded plasma due to formation of electron halo

Spitsyn, R. I.; Lotov, K. V.

doi:10.1088/1361-6587/abe055

Cited by 9 publications

(6 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Correspondingly, large longitudinal wakefields lead to a 2 GeV energy gain of externally injected 19 MeV test electrons [31,32]. Acceleration experiments also suggest that wakefields may break in the back of the bunch, due to the large amplitude of the wakefields and to the finite radial extent of the plasma [33,34]. Combined halo radius and acceleration results in experiment and simulations show that the SM process saturates a distance between three and five metres along the plasma [35].…”

Section: Summary Of Experimental Results From Awake Runmentioning

confidence: 93%

The AWAKE Run 2 programme and beyond

Gschwendtner¹,

Lotov²,

Muggli³

et al. 2022

Preprint

View full text Add to dashboard Cite

Plasma wakefield acceleration is a promising technology to reduce the size of particle accelerators. Use of high energy protons to drive wakefields in plasma has been demonstrated during Run 1 of the AWAKE programme at CERN. Protons of energy 400 GeV drove wakefields that accelerated electrons to 2 GeV in under 10 m of plasma. The AWAKE collaboration is now embarking on Run 2 with the main aims to demonstrate stable accelerating gradients of 0.5-1 GV/m, preserve emittance of the electron bunches during acceleration and develop plasma sources scalable to 100s of metres and beyond. By the end of Run 2, the AWAKE scheme should be able to provide electron beams for particle physics experiments and several possible experiments have already been evaluated. This article summarises the programme of AWAKE Run 2 and how it will be achieved as well as the possible application of the AWAKE scheme to novel particle physics experiments.

show abstract

Section: Summary Of Experimental Results From Awake Runmentioning

confidence: 93%

The AWAKE Run 2 programme and beyond

Gschwendtner¹,

Lotov²,

Muggli³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…As the plasma expands radially, the region of the strong electric field also moves to larger radii (figure 10(b)). Similar processes occur when a moderately nonlinear plasma wave breaks [46,47] or the plasma is heated by a strong laser pulse [48].…”

Section: Wave Breakingmentioning

confidence: 88%

Ion dynamics driven by a strongly nonlinear plasma wake

Khudiakov¹,

Lotov²,

Downer³

2022

Plasma Phys. Control. Fusion

Self Cite

View full text Add to dashboard Cite

In plasma wakeﬁeld accelerators, the wave excited in the plasma eventually breaks and leaves behind slowly changing ﬁelds and currents that perturb the ion density background. We study this process numerically using the example of a FACET experiment where the wave is excited by an electron bunch in the bubble regime in a radially bounded plasma. Four physical eﬀects underlie the dynamics of ions: (1) attraction of ions toward the axis by the ﬁelds of the driver and the wave, resulting in formation of a density peak, (2) generation of ion-acoustic solitons following the decay of the density peak, (3) positive plasma charging after wave breaking, leading to acceleration of some ions in the radial direction, and (4) plasma pinching by the current generated during the wavebreaking. Interplay of these eﬀects result in formation of various radial density proﬁles, which are diﬃcult to produce in any other way.

show abstract

“…The effect of density variations on phase behavior becomes stronger as the distance between the witness and the driver increases. In our case, however, this solution does not work, since the wakefield lifetime, depending on the regime, is limited either by the ion motion [22,23] or by the appearance of halo electrons [24] and does not exceed the driver duration (figure 5(a)).…”

mentioning

confidence: 85%

Plasma wakefield acceleration beyond the dephasing limit with 400 GeV proton driver

Lotov¹,

Tuev²

2021

Plasma Phys. Control. Fusion

Self Cite

View full text Add to dashboard Cite

A new regime of proton-driven plasma wakefield acceleration is discovered, in which the plasma nonlinearity increases the phase velocity of the excited wave compared to that of the protons. If the beam charge is much larger than minimally necessary to excite a nonlinear wave, there is sufficient freedom in choosing the longitudinal plasma density profile to make the wave speed close to the speed of light. This allows electrons or positrons to be accelerated to about 200 GeV with a 400 GeV proton driver.

show abstract

Wakefield decay in a radially bounded plasma due to formation of electron halo

Cited by 9 publications

References 46 publications

The AWAKE Run 2 programme and beyond

The AWAKE Run 2 programme and beyond

Ion dynamics driven by a strongly nonlinear plasma wake

Plasma wakefield acceleration beyond the dephasing limit with 400 GeV proton driver

Contact Info

Product

Resources

About