Electron beam and betatron x-ray generation in a hybrid electron accelerator driven by high intensity picosecond laser pulses

Li, Y.F.; Feng, J.; Tan, Jianhua; Wang, J.G.; Li, D.Z.; Dong, Keyan; Zhang, X.H.; Zhu, Bin; Tan, Fuli; Wu, Yuchi; Gu, Yuqiu; Chen, L.M.

doi:10.1016/j.hedp.2020.100859

Cited by 4 publications

(4 citation statements)

References 42 publications

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“…Moreover, tens of nC directional electron beams can be produced from vacuum laser acceleration [26][27][28] or target surface electron acceleration [29] by laser-solid interactions, but an important limiting factor is the short acceleration distance resulting in electron energies that are usually less than 10 MeV. There is another method called self-modulated laser wakefield acceleration (SM-LWFA) [30][31][32][33] in which long laser pulses overlap with several tens of plasma waves, thereby trapping a large number of electrons and accelerating them in every wakefield, and the beam charge can be increased tremendously to hundreds of nC, [34,35] but this method requires a kilojoule-class picosecond (ps) laser facility with a size and cost that are at least ten times that of a fs laser facility. In general, for laser plasma electron acceleration using a small laser, it is a great challenge to realize an electron beam with a large charge, tight collimation and high energy.…”

Section: Introductionmentioning

confidence: 99%

Laser Plasma‐Accelerated Ultra‐Intense Electron Beam for Efficiently Exciting Nuclear Isomers

Feng,

Li,

Tan

et al. 2023

Laser & Photonics Reviews

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Utilizing a laser plasma wakefield to accelerate ultrahigh charge and current electron beams is critical for many pioneering applications, for example, to efficiently produce nuclear isomers with short lifetimes that may be widely used. However, because of the beam loading effect, the electron charge in a single plasma bubble is limited to hundreds of picocoulombs. Herein, via a tightly focused intense laser pulse self‐guiding in dense gas, a twenty‐nanocoulomb, tens‐of‐MeV, hundred‐kiloampere collimated electron beam is produced from a chain of plasma bubbles in the saturated injection regime. This intense electron beam is utilized to excite indium nuclear isomers with an ultrahigh peak rate of particles·s‐1 via photonuclear reaction. This efficient isomer production method can be widely used for pumping isotopes with excited state lifetimes on the picosecond scale, which is beneficial for deeply understanding nuclear transition mechanisms or stimulating γ‐ray lasers.

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Section: Introductionmentioning

confidence: 99%

Laser Plasma‐Accelerated Ultra‐Intense Electron Beam for Efficiently Exciting Nuclear Isomers

Feng,

Li,

Tan

et al. 2023

Laser & Photonics Reviews

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“…There are also some efforts in improving beam charge by increasing laser energy and using high-Z gas [23][24][25][26], but they still do not break through the limitation of beam loading effect. While self-modulated laser wakefield acceleration (SM-LWFA) [27][28][29][30] that long laser pulse overlaps with several tens of plasma waves, large number of electrons can be trapped and accelerated in every wakefield and the beam charge can be increased tremendously to tens of nC [31,32], but it requires a hundred joule class picosecond (ps) laser facility. Moreover, directional electron beams with tens of nC charge have also been produced via vacuum laser acceleration with a plasma mirror injector [33,34].…”

Section: Introductionmentioning

confidence: 99%

Laser plasma accelerated ultra-intense electron beam for efficiently exciting nuclear isomers

Feng¹,

Li²,

Tan³

et al. 2022

Preprint

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Utilizing laser plasma wakefield to accelerate ultra-high charge electron beam is critical for many pioneering applications, for example to efficiently produce nuclear isomers with short lifetimes which may be widely used. However, because of the beam loading effect, electron charge in a single plasma bubble is limited in level of hundreds picocoulomb. Here, we experimentally present that a hundred kilo-ampere, twenty nanocoulomb, tens of MeV collimated electron beam is produced from a chain of wakefield acceleration, via a tightly focused intense laser pulse transversely matched in dense plasma. This ultra-intense electron beam ascribes to a novel efficient injection that the nitrogen atom inner shell electrons are ionized and continuously injected into multiple plasma bubbles. This intense electron beam has been utilized to exciting nuclear isomers with an ultra-high peak efficiency of 1.76 × 10 15 particles/s via photonuclear reactions. This efficient production method of isomers can be widely used for pumping isotopes with excited state lifetimes down to picosecond, which is benefit for deep understanding nuclear transition mechanisms and stimulating gamma-ray lasers.

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“…Continued improvement of x-ray sources coupled to HEDS drivers is a constant priority at these facilities for backlighting and radiography. LPA-based x-ray sources utilizing self-modulated laser wakefield acceleration (SMLWFA) have already shown promise as MeV-class radiography or high-flux broadband sources 1 – 10 . SMLWFA-based sources can deliver such high fluxes on account of the two orders of magnitude higher electron charge that they deliver compared to other LPA sources (Fig.…”

Section: Introductionmentioning

confidence: 99%

Microcoulomb (0.7 ± $$\frac{0.4}{0.2}$$ μC) laser plasma accelerator on OMEGA EP

Shaw

Romo-Gonzalez

Lemos

et al. 2021

Sci Rep

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Laser-plasma accelerators (LPAs) driven by picosecond-scale, kilojoule-class lasers can generate particle beams and x-ray sources that could be utilized in experiments driven by multi-kilojoule, high-energy-density science (HEDS) drivers such as the OMEGA laser at the Laboratory for Laser Energetics (LLE) or the National Ignition Facility at Lawrence Livermore National Laboratory. This paper reports on the development of the first LPA driven by a short-pulse, kilojoule-class laser (OMEGA EP) connected to a multi-kilojoule HEDS driver (OMEGA). In experiments, electron beams were produced with electron energies greater than 200 MeV, divergences as low as 32 mrad, charge greater than 700 nC, and conversion efficiencies from laser energy to electron energy up to 11%. The electron beam charge scales with both the normalized vector potential and plasma density. These electron beams show promise as a method to generate MeV-class radiography sources and improved-flux broadband x-ray sources at HEDS drivers.

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Electron beam and betatron x-ray generation in a hybrid electron accelerator driven by high intensity picosecond laser pulses

Cited by 4 publications

References 42 publications

Laser Plasma‐Accelerated Ultra‐Intense Electron Beam for Efficiently Exciting Nuclear Isomers

Laser Plasma‐Accelerated Ultra‐Intense Electron Beam for Efficiently Exciting Nuclear Isomers

Laser plasma accelerated ultra-intense electron beam for efficiently exciting nuclear isomers

Microcoulomb (0.7 ± $$\frac{0.4}{0.2}$$ μC) laser plasma accelerator on OMEGA EP

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