Generation of electron beams from a laser wakefield acceleration in pure neon gas

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

doi:10.1063/1.4892557

Cited by 4 publications

(3 citation statements)

References 29 publications

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“…The magnet is composed of two rectangular permanent magnets of 6 (length) × 4 (width) cm with a 1 cm pole gap, to deflect the electron beams on the DRZ2 screen that was placed 82 cm away from the magnet end. The effective magnetic field strength was ~Beff = 0.9 T. The electron beam pointing angle at the magnet entrance plane was measured shot-to-shot [33][34][35][36], and was considered for correcting the energy spectrum measurement. The scattered light from the laser-plasma interaction volume was filtered and imaged onto a synchronized 14-bit CCD. )…”

Section: Methodsmentioning

confidence: 99%

Laser acceleration in argon clusters and gas media

Mirzaie

Hafz

et al. 2016

Plasma Phys. Control. Fusion

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We experimentally investigated the generation of high-energy electron beams from laserdriven wakefield acceleration in argon gas jets by using tens of terawatt 30 fs ultrafast laser pulses that were focused to a relatively large-spot size, unmatched with the laser-plasma parameters. In this interaction, and depending on the Ar gas jet density, we could distinguish two different regimes for electron acceleration in the argon medium. In the high-density argon gas jet where argon clusters are formed, upon interaction with the laser electron beams having as high a charge as 3nC are generated. However, the energy spectra of those electron beams were continuous. On the other hand, high-quality quasi-mono-energetic electron beams with a modest charge of tens of pC are observed at much lower argon gas jet densities. The generation of such a high-quality electron beam is attributed to the ionization injection mechanism in which the electron injection takes place over only a few hundred micrometers of the laser-plasma interaction length, leading to the generation of high-quality electron beams.

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Section: Methodsmentioning

confidence: 99%

Laser acceleration in argon clusters and gas media

Mirzaie

Hafz

et al. 2016

Plasma Phys. Control. Fusion

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“…The experiment was conducted using a Ti:sapphire 200 TW laser facility at the Key Laboratory for Laser Plasmas of Shanghai Jiao Tong University in China. Here, we briefly describe the upgrade of the basic experimental configuration introduced in previous papers [30][31][32] .…”

Section: Methodsmentioning

confidence: 99%

“…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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Acceleration of electrons generated during ionization of low density gases by a focused laser pulse

2015

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The acceleration of electrons generated during ionization of low density gases has been studied using seventh order correction fields of a laser pulse for linearly and circularly polarized laser pulse. The spectrum of energy and angle of emittance of the electrons generated and accelerated during ionization of nitrogen ions N5+, oxygen ions O6+, neon ions Ne8+, krypton ions Kr32+, and argon ions Ar16+ has been obtained for normalized laser intensity parameter a0=4, 6, 12, 20, and 75, respectively, for normalized laser spot size r0=60, 90, and 120. Energy and scattering spectrum for nitrogen, oxygen, and neon ions show two peaks and may generate quasimonoenergetic beams for small laser spot sizes. The energy spectrum is wide and peak lies at low energy for krypton than that for argon. The energy peaks are at higher energy for circularly polarized laser pulse than that for linearly polarized laser pulse. The paraxial approximation may fail to yield accurate results at low values of laser spot size and high laser intensity. The energy associated with spectrum peak tends to saturate with laser intensity.

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Generation of electron beams from a laser wakefield acceleration in pure neon gas

Cited by 4 publications

References 29 publications

Laser acceleration in argon clusters and gas media

Laser acceleration in argon clusters and gas media

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

Acceleration of electrons generated during ionization of low density gases by a focused laser pulse

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