Quasimonoenergetic collimated electron beams from a laser wakefield acceleration in low density pure nitrogen

Tao, Mengze; Hafz, N.; Li, Song; Mirzaie, Maryam; Elsied, Ahmed M. M.; Ge, Xuan; Liu, Feng; Sokollik, Thomas; Chen, Liming; Sheng, Zheng-Ming; Zhang, Jie

doi:10.1063/1.4889877

Cited by 15 publications

(20 citation statements)

References 19 publications

(19 reference statements)

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“…It was observed, given the relatively-large laser spot size in our experiment, that there is a trend for a high-quality (low-quality) and stable (unstable) electron beam generation at low (higher) plasma density. In addition, the electron self-injection mechanism due to the laser self-focusing is expected to be the main mechanism in this case, as confirmed by our 2D-PIC simulations 36,37 . Fig.7a.…”

Section: Helium Gas Jetsupporting

confidence: 70%

Enhanced electron yield from laser-driven wakefield acceleration in high-Z gas jets

Mirzaie

Hafz

et al. 2015

Review of Scientific Instruments

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An investigation of the electron beam yield (charge) form helium, nitrogen, and neon gas jet plasmas in a typical laser-plasma wakefield acceleration experiment is carried out. The charge measurement is made by imaging the electron beam intensity profile on a fluorescent screen into a charge coupled device which was cross-calibrated with an integrated current transformer. The dependence of electron beam charge on the laser and plasma conditions for the aforementioned gases are studied. We found that laser-driven wakefield acceleration in low Z-gas jet targets usually generates high-quality and well-collimated electron beams with modest yields at the level of 10-100 pC. On the other hand, filamentary electron beams which are observed from high-Z gases at higher densities reached much higher yields. Evidences for cluster formation were clearly observed in the nitrogen gas jet target, where we received the highest electron beam charge of ∼1.7 nC. Those intense electron beams will be beneficial for the applications on the generation of bright X-rays, gamma rays radiations, and energetic positrons via the bremsstrahlung or inverse-scattering processes.

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Section: Helium Gas Jetsupporting

confidence: 70%

Enhanced electron yield from laser-driven wakefield acceleration in high-Z gas jets

Mirzaie

Hafz

et al. 2015

Review of Scientific Instruments

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“…This case is closer to the case of our previously reported LWFA results in pure nitrogen gas jets which generates long-tail electron beams [32,37] . Therefore, we conclude that, given an unmatched laser-plasma parameter, an optimization of the doped gas concentration seems to be very important to achieve an optimum electron beam quality with very small energy spread.…”

Section: Resultsmentioning

confidence: 66%

“…Here, we briefly describe the upgrade of the basic experimental configuration introduced in previous papers [30][31][32] .…”

Section: Methodsmentioning

confidence: 99%

Generation of high-quality electron beams by ionization injection in a single acceleration stage

Hafz

et al. 2016

High Pow Laser Sci Eng

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Ionization-induced electron injection in laser wakefield accelerators, which was recently proposed to lower the laser intensity threshold for electron trapping into the wake wave, has the drawback of generating electron beams with large and continuous energy spreads, severely limiting their future applications. Complex target designs based on separating the electron trapping and acceleration stages were proposed as the only way for getting small energy-spread electron beams. Here, based on the self-truncated ionization-injection concept which requires the use of unmatched laser-plasma parameters and by using tens of TW laser pulses focused onto a gas jet of helium mixed with low concentrations of nitrogen, we demonstrate single-stage laser wakefield acceleration of multi-hundred MeV electron bunches with energy spreads of a few percent. The experimental results are verified by PIC simulations.

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“…[20][21][22][23] Quasimonoenergetic electron beams have been observed from a single stage Nitrogen gas target. [24][25][26] However, betatron x-rays emitted from ionization injection were merely studied, and the simultaneous generation of high-quality quasimonoenergetic electron and x-ray beams was scarcely observed. 27 In this paper, we present a simultaneous generation of quasimonoenergetic electron and betatron x-ray beams in the ionization injection regime.…”

mentioning

confidence: 98%

Simultaneous generation of quasi-monoenergetic electron and betatron X-rays from nitrogen gas via ionization injection

Huang

Yan

et al. 2014

Applied Physics Letters

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Upon the interaction of 60 TW Ti: sapphire laser pulses with 4 mm long supersonic nitrogen gas jet, a directional x-ray emission was generated along with the generation of stable quasi-monoenergetic electron beams having a peak energy of 130 MeV and a relative energy spread of ∼ 20%. The betatron x-ray emission had a small divergence of 7.5 mrad and a critical energy of 4 keV. The laser wakefield acceleration process was stimulated in a background plasma density of merely 5.4 × 1017 cm−3 utilizing ionization injection. The non-self-focusing and stable propagation of the laser pulse in the pure nitrogen gaseous plasma should be responsible for the simultaneous generation of the high-quality X-ray and electron beams. Those ultra-short and naturally-synchronized beams could be applicable to ultrafast pump-probe experiments.

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Quasimonoenergetic collimated electron beams from a laser wakefield acceleration in low density pure nitrogen

Cited by 15 publications

References 19 publications

Enhanced electron yield from laser-driven wakefield acceleration in high-Z gas jets

Enhanced electron yield from laser-driven wakefield acceleration in high-Z gas jets

Generation of high-quality electron beams by ionization injection in a single acceleration stage

Simultaneous generation of quasi-monoenergetic electron and betatron X-rays from nitrogen gas via ionization injection

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