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Title: High quality electron bunch generation using a longitudinal density-tailored plasma-based accelerator in the three-dimensional blowout regime

Abstract

The generation of very high quality electron bunches (high brightness and low energy spread) from a plasma-based accelerator in the three-dimensional blowout regime using self-injection in tailored plasma density profiles is analyzed theoretically and with particle-in-cell simulations. The underlying physical mechanism that leads to the generation of high quality electrons is uncovered by tracking the trajectories of the electrons in the sheath that are trapped by the wake. Details on how the intensity of the driver and the density scale-length of the plasma control the ultimate beam quality are described. Three-dimensional particle-in-cell simulations indicate that this concept has the potential to produce beams with peak brightnesses between 1 0 20 and 1 0 21 A / m 2 / rad 2 and with absolute slice energy spreads of ~ O ( 0.1 ) MeV using existing lasers or electron beams to drive nonlinear wakefields. We also show projected energy spreads as low as ~ 0.3 MeV for half the charge can be generated at an optimized acceleration distance.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Univ. of California, Los Angeles, CA (United States); Tsinghua Univ., Beijing (China); Shanghai Jiao Tong Univ. (China)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); National Science Foundation (NSF); National Natural Science Foundation of China (NSFC); Thousand Young Talents Program (China)
OSTI Identifier:
1409710
Alternate Identifier(s):
OSTI ID: 1503824
Grant/Contract Number:  
SC0010064; SC0014260; 11425521; 11535006; 11375006; 11475101; 1500630; 1734315; ACI-1339893; ACI-1614949; ACI-1713760
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams Journal Volume: 20 Journal Issue: 11; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; laser wakefield acceleration; particle acceleration in plasmas; plasma acceleration & new acceleration techniques

Citation Formats

Xu, X. L., Li, F., An, W., Dalichaouch, T. N., Yu, P., Lu, W., Joshi, C., and Mori, W. B.. High quality electron bunch generation using a longitudinal density-tailored plasma-based accelerator in the three-dimensional blowout regime. United States: N. p., 2017. Web. https://doi.org/10.1103/PhysRevAccelBeams.20.111303.
Xu, X. L., Li, F., An, W., Dalichaouch, T. N., Yu, P., Lu, W., Joshi, C., & Mori, W. B.. High quality electron bunch generation using a longitudinal density-tailored plasma-based accelerator in the three-dimensional blowout regime. United States. https://doi.org/10.1103/PhysRevAccelBeams.20.111303
Xu, X. L., Li, F., An, W., Dalichaouch, T. N., Yu, P., Lu, W., Joshi, C., and Mori, W. B.. Tue . "High quality electron bunch generation using a longitudinal density-tailored plasma-based accelerator in the three-dimensional blowout regime". United States. https://doi.org/10.1103/PhysRevAccelBeams.20.111303.
@article{osti_1409710,
title = {High quality electron bunch generation using a longitudinal density-tailored plasma-based accelerator in the three-dimensional blowout regime},
author = {Xu, X. L. and Li, F. and An, W. and Dalichaouch, T. N. and Yu, P. and Lu, W. and Joshi, C. and Mori, W. B.},
abstractNote = {The generation of very high quality electron bunches (high brightness and low energy spread) from a plasma-based accelerator in the three-dimensional blowout regime using self-injection in tailored plasma density profiles is analyzed theoretically and with particle-in-cell simulations. The underlying physical mechanism that leads to the generation of high quality electrons is uncovered by tracking the trajectories of the electrons in the sheath that are trapped by the wake. Details on how the intensity of the driver and the density scale-length of the plasma control the ultimate beam quality are described. Three-dimensional particle-in-cell simulations indicate that this concept has the potential to produce beams with peak brightnesses between 1020 and 1021 A/m2/rad2 and with absolute slice energy spreads of ~O(0.1) MeV using existing lasers or electron beams to drive nonlinear wakefields. We also show projected energy spreads as low as ~0.3 MeV for half the charge can be generated at an optimized acceleration distance.},
doi = {10.1103/PhysRevAccelBeams.20.111303},
journal = {Physical Review Accelerators and Beams},
number = 11,
volume = 20,
place = {United States},
year = {2017},
month = {11}
}

Journal Article:
Free Publicly Available Full Text

Citation Metrics:
Cited by: 6 works
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Figures / Tables:

FIG. 1 FIG. 1: (a) Schematic of density downramp injection. The plasma density decreases linearly from $n_{p,h}$ at $z$ = 0 to $n_{p0}$ at $z$ = $L$. (b) The plasma wake produced by a short electron bunch with Λ = 1 before (left) and after (right) it propagates through the density downramp.more » The black lines are the on-axis $E_{z}$ and the purple (blue) marker indicates the position where $E_{z}$ = 0 when the beam is before (after) the ramp. (c) Evolution of the phase velocity $\gamma_{\phi,E_{z} = 0}$ from Eq. (1) (solid lines) and 3D PIC simulations (dashed lines). The parameters are: $\gamma_{b}$ = 2500, $n_{b}$ = 16$n_{p0}$, $\phi_{z}$ = 0.7 $\frac{c}{ω_{p0}}$, $\phi_{r}$ = 0.25 $\frac{c}{ω_{p0}}$ when Λ = 1 and $\phi_{r}$ = 0.5 $\frac{c}{ω_{p0}}$ when Λ = 4.« less

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      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.