Transverse phase space diagnostics for ionization injection in laser plasma acceleration using permanent magnetic quadrupoles

Li, F.; Nie, Zan; Yuchi, Wu; Guo, Bo; Zhang, X. H.; Huang, Shan; Zhang, J.; Cheng, Zhi; Ma, Y.; Fang, Yu; Zhang, C. J.; Wan, Y.; Xu, Xinlu; Hua, Jianfei; Pai, Chih-Hao; Lü, Wei; Mori, W. B.

doi:10.1088/1361-6587/aaacc2

Cited by 4 publications

(2 citation statements)

References 40 publications

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“…Previously, the temporal duration of the LPA electron bunch was characterized as few femtoseconds using techniques such as coherent transition radiation 12 , 19 , ultrafast Faraday rotation 20 and optical streaking 21 . On the contrary, their transverse properties were mainly measured at positions far from the plasma source using quadrupole scans 14 , 22 , 23 and pepper-pot masks 24 – 26 . Other methods relied on the spectra analysis of x-ray Betatron or Compton radiations 13 , 27 , 28 only give an indirect estimate of the beam diameter either averaged over the whole acceleration region 13 , 27 or after entirely outside the plasma 28 .…”

Section: Introductionmentioning

confidence: 99%

Femtosecond electron microscopy of relativistic electron bunches

et al. 2023

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The development of plasma-based accelerators has enabled the generation of very high brightness electron bunches of femtosecond duration, micrometer size and ultralow emittance, crucial for emerging applications including ultrafast detection in material science, laboratory-scale free-electron lasers and compact colliders for high-energy physics. The precise characterization of the initial bunch parameters is critical to the ability to manipulate the beam properties for downstream applications. Proper diagnostic of such ultra-short and high charge density laser-plasma accelerated bunches, however, remains very challenging. Here we address this challenge with a novel technique we name as femtosecond ultrarelativistic electron microscopy, which utilizes an electron bunch from another laser-plasma accelerator as a probe. In contrast to conventional microscopy of using very low-energy electrons, the femtosecond duration and high electron energy of such a probe beam enable it to capture the ultra-intense space-charge fields of the investigated bunch and to reconstruct the charge distribution with very high spatiotemporal resolution, all in a single shot. In the experiment presented here we have used this technique to study the shape of a laser-plasma accelerated electron beam, its asymmetry due to the drive laser polarization, and its beam evolution as it exits the plasma. We anticipate that this method will significantly advance the understanding of complex beam-plasma dynamics and will also provide a powerful new tool for real-time optimization of plasma accelerators.

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Section: Introductionmentioning

confidence: 99%

Femtosecond electron microscopy of relativistic electron bunches

et al. 2023

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“…In recent decades, table-top laser wakefield accelerators (LWFA) [1] have attracted worldwide attention for their potential in the generation of high-energy high-quality electron beams [2][3][4][5][6][7][8][9][10], which are promising candidates for the compact light sources. In the LWFA, electrons can gain hundreds of MeV energy within a few millimeter distance due to the accelerating gradient of 100 GV m -1 [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of laser-driven betatron x-rays by a density-depressed plasma structure

Guo

Cheng

Liu

et al. 2019

Plasma Phys. Control. Fusion

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We report a significant enhancement of betatron radiation from a laser wakefield accelerator (LWFA) by inserting a density-depressed plasma structure. By using a technique of transverse laser machining, a longitudinally density-depressed plasma structure with tunable length and position has been fabricated to increase the betatron amplitude of the electron beam in the LWFA, leading to an enhanced photon number and critical energy of the betatron x-ray beam. By adjusting the length and position of the plasma density depression region, the photon number of the betatron x-ray is enhanced by a factor of 3, and the critical energy is enhanced by a factor of 1.4.

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EuPRAXIA Conceptual Design Report

Aßmann

Weikum

Akhter

et al. 2020

Eur. Phys. J. Spec. Top.

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This report presents the conceptual design of a new European research infrastructure EuPRAXIA. The concept has been established over the last four years in a unique collaboration of 41 laboratories within a Horizon 2020 design study funded by the European Union. EuPRAXIA is the first European project that develops a dedicated particle accelerator research infrastructure based on novel plasma acceleration concepts and laser technology. It focuses on the development of electron accelerators and underlying technologies, their user communities, and the exploitation of existing accelerator infrastructures in Europe. EuPRAXIA has involved, amongst others, the international laser community and industry to build links and bridges with accelerator science — through realising synergies, identifying disruptive ideas, innovating, and fostering knowledge exchange. The Eu-PRAXIA project aims at the construction of an innovative electron accelerator using laser- and electron-beam-driven plasma wakefield acceleration that offers a significant reduction in size and possible savings in cost over current state-of-the-art radiofrequency-based accelerators. The foreseen electron energy range of one to five gigaelectronvolts (GeV) and its performance goals will enable versatile applications in various domains, e.g. as a compact free-electron laser (FEL), compact sources for medical imaging and positron generation, table-top test beams for particle detectors, as well as deeply penetrating X-ray and gamma-ray sources for material testing. EuPRAXIA is designed to be the required stepping stone to possible future plasma-based facilities, such as linear colliders at the high-energy physics (HEP) energy frontier. Consistent with a high-confidence approach, the project includes measures to retire risk by establishing scaled technology demonstrators. This report includes preliminary models for project implementation, cost and schedule that would allow operation of the full Eu-PRAXIA facility within 8—10 years.

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Transverse phase space diagnostics for ionization injection in laser plasma acceleration using permanent magnetic quadrupoles

Cited by 4 publications

References 40 publications

Femtosecond electron microscopy of relativistic electron bunches

Femtosecond electron microscopy of relativistic electron bunches

Enhancement of laser-driven betatron x-rays by a density-depressed plasma structure

EuPRAXIA Conceptual Design Report

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