Tailored plasma-density profiles for enhanced energy extraction in passive plasma beam dumps

Jakobsson, Oscar; Bonatto, Alexandre; Li, Yangmei; Zhao, Yuan; Nunes, Roger Pizzato; Williamson, B.; Xia, Guoxing; Tajima, T.

doi:10.1088/1361-6587/ab4cfb

Cited by 5 publications

(12 citation statements)

References 37 publications

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“…After some time, the fraction of the bunch experiencing the maximum decelerating field will become non-relativistic, and it will fall behind the rest of the bunch until it reaches an accelerating phase of the wakefield. This causes beam re-acceleration, which eventually leads to saturation of beam net energy loss [9,13,14]. In order to eliminate beam re-acceleration, several schemes have been proposed, which include inserting foils in the plasma to absorb the re-accelerated particles, and tailoring the plasma density along the beam propagation direction to change the relative phases of wakefield along the beam driver.…”

Section: Plasma Beam Dumpsmentioning

confidence: 99%

“…In order to eliminate beam re-acceleration, several schemes have been proposed, which include inserting foils in the plasma to absorb the re-accelerated particles, and tailoring the plasma density along the beam propagation direction to change the relative phases of wakefield along the beam driver. Recent studies have shown that the beam energy deposition in plasma can be greatly enhanced through finely tailoring the plasma densities [13,14]. On the other hand, in the APBD this beam re-acceleration is eliminated.…”

Section: Plasma Beam Dumpsmentioning

confidence: 99%

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Plasma Beam Dumps for the EuPRAXIA Facility

et al. 2020

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Beam dumps are indispensable components for particle accelerator facilities to absorb or dispose beam kinetic energy in a safe way. However, the design of beam dumps based on conventional technology, i.e., energy deposition via beam–dense matter interaction, makes the beam dump facility complicated and large in size, partly due to the high beam intensities and energies achieved. In addition, specific methods are needed to address the radioactive hazards that these high-power beams generate. On the other hand, the European Plasma Research Accelerator with eXcellence in Application (EuPRAXIA) project can advance the laser–plasma accelerator significantly by achieving a 1–5 GeV high-quality electron beam in a compact layout. Nevertheless, beam dumps based on the conventional technique will still produce radiation hazards and make the overall footprint less compact. Here, a plasma beam dump will be implemented to absorb the kinetic energy from the EuPRAXIA beam. In doing so, the overall compactness of the EuPRAXIA layout could be further improved, and the radioactivity generated by the facility can be mitigated. In this paper, results from particle-in-cell simulations are presented for plasma beam dumps based on EuPRAXIA beam parameters.

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Section: Plasma Beam Dumpsmentioning

confidence: 99%

Section: Plasma Beam Dumpsmentioning

confidence: 99%

Plasma Beam Dumps for the EuPRAXIA Facility

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…After some time, the fraction of the bunch experiencing the maximum decelerating field will become non-relativistic, and it will fall behind the rest of the bunch until it reaches an accelerating phase of the wakefield. This causes beam re-acceleration, which eventually leads to saturation of the beam net energy loss [9,[13][14]. In order to eliminate the beam re-acceleration, several schemes have been proposed which include inserting foils in the plasma to absorb the re-accelerated particles, and tailoring the plasma density along the beam propagation direction to change the relative phases of wakefield along the beam driver.…”

Section: Plasma Beam Dumpsmentioning

confidence: 99%

“…In order to eliminate the beam re-acceleration, several schemes have been proposed which include inserting foils in the plasma to absorb the re-accelerated particles, and tailoring the plasma density along the beam propagation direction to change the relative phases of wakefield along the beam driver. Recent studies have shown that the beam energy deposition in plasma can be greatly enhanced through finely tailoring the plasma densities [13][14]. On the other hand, in the APBD this beam re-acceleration is eliminated.…”

Section: Plasma Beam Dumpsmentioning

confidence: 99%

“…Figure 2 shows a typical plasma density profile in which the density increases in a non-linear fashion from n0 = 9.9×10 17 cm -3 , at 6 cm, to 10 n0 = 9.9×10 18 cm -3 , at approximately 17 cm. This particular plasma density profile can be obtained by imposing a constant rate of change for the plasma wavelength with respect to the propagation distance s, i.e., / = constant [14]. As a comparison, the beam longitudinal phase space after 16 cm plasma is shown in Figure 3.…”

Section: Plasma Beam Dump For 1 Gev Beammentioning

confidence: 99%

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Plasma Beam Dumps for EuPRAXIA Facility

Xia¹,

Bonatto²,

Nunes³

et al. 2020

Preprint

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Beam dumps are indispensable components for particle accelerator facilities to absorb or dispose beam kinetic energy in a safe way. However, the design of beam dumps based on conventional technology, i.e. the energy deposition via beam-dense matter interaction, makes the beam dump facility complicated and large in size, partly due to nowadays’ high beam intensities and energies achieved. In addition, these high-power beams generate radioactive hazards, which need specific methods to deal with. On the other hand, the EuPRAXIA project can advance the laser-plasma accelerator significantly by achieving 1-5 GeV high quality electron beam in a compact layout. Nevertheless, the beam dump based on conventional technique will still produce radiation hazards and make the overall footprint less compact. Here, we propose to implement a plasma beam dump to absorb the kinetic energy from the EuPRAXIA beam. In doing so, the overall compactness of the EuPRAXIA layout will not be impacted, and the radioactivity generated by the facility can be mitigated. In this paper, results from particle-in-cell (PIC) simulations are presented for plasma beam dumps based on EuPRAXIA beam parameters.

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Advances in plasma-based beam dump modelling

Bonatto

Nunes

Jakobsson

et al. 2020

J. Phys.: Conf. Ser.

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This work presents a short review on the advances of plasma beam dump modelling since they have been first proposed. Analytical models have been derived to estimate the beam energy loss for both passive and active beam dump schemes. For the passive case in particular, tailored plasma density profiles can improve beam-energy extraction by mitigating particle re-acceleration. A semi-analytical model, consisting of the dynamics of test-particles experiencing the previously derived analytical wakefields, is under development to investigate deceleration beyond the saturation point, in the linear to the quasi-linear regime.

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Tailored plasma-density profiles for enhanced energy extraction in passive plasma beam dumps

Abstract: Tailored plasma-density profiles for enhanced energy extraction in passive plasma beam dumps. Plasma Physics and Controlled Fusion.

Cited by 5 publications

References 37 publications

Plasma Beam Dumps for the EuPRAXIA Facility

Plasma Beam Dumps for the EuPRAXIA Facility

Plasma Beam Dumps for EuPRAXIA Facility

Advances in plasma-based beam dump modelling

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