Concurrence of monoenergetic electron beams and bright X-rays from an evolving laser-plasma bubble
Wenchao Yan,Liming Chen,Dazhang Li,Lu Zhang,Nasr A. M. Hafz,James Dunn,Yong Ma,Kai Huang,LuNing Su,Min Chen,Zheng-Ming Sheng,Jie Zhang +11 more
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TLDR
The first (to the authors' knowledge) experimental observation of two distinct electron bunches in a single laser shot, one featured with quasi-monoenergetic spectrum and another with continuous spectrum along with large emittance, which is able to generate high-flux betatron X-rays.Abstract:
Desktop laser plasma acceleration has proven to be able to generate gigaelectronvolt-level quasi-monoenergetic electron beams. Moreover, such electron beams can oscillate transversely (wiggling motion) in the laser-produced plasma bubble/channel and emit collimated ultrashort X-ray flashes known as betatron radiation with photon energy ranging from kiloelectronvolts to megaelectronvolts. This implies that usually one cannot obtain bright betatron X-rays and high-quality electron beams with low emittance and small energy spread simultaneously in the same accelerating wave bucket. Here, we report the first (to our knowledge) experimental observation of two distinct electron bunches in a single laser shot, one featured with quasi-monoenergetic spectrum and another with continuous spectrum along with large emittance. The latter is able to generate high-flux betatron X-rays. Such is observed only when the laser self-guiding is extended over 4 mm at a fixed plasma density (4 × 1018 cm−3). Numerical simulation reveals that two bunches of electrons are injected at different stages due to the bubble evolution. The first bunch is injected at the beginning to form a stable quasi-monoenergetic electron beam, whereas the second one is injected later due to the oscillation of the bubble size as a result of the change of the laser spot size during the propagation. Due to the inherent temporal synchronization, this unique electron–photon source can be ideal for pump–probe applications with femtosecond time resolution.read more
Citations
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Demonstration of self-truncated ionization injection for GeV electron beams
Mohammad Mirzaie,Song Li,Ming Zeng,Nasr A. M. Hafz,Ming-Yun Chen,Guimiao Li,Q. J. Zhu,H. Liao,Thomas Sokollik,Fatao Liu,Yunlin Ma,Lu-Ting Chen,Zheng-Ming Sheng,Zheng-Ming Sheng,Jie Zhang +14 more
TL;DR: Experimental observations of the self-truncated ionization injection scenario in centimeter-long plasma leading to the generation of narrow energy-spread GeV electron beams demonstrate its robustness and scalability and is therefore promising for practical applications.
Journal ArticleDOI
Generation of 20 kA electron beam from a laser wakefield accelerator
Y. F. Li,D. Z. Li,Kai Huang,M. Z. Tao,M. H. Li,J. R. Zhao,Yong Ma,X. Guo,J. G. Wang,Min Chen,Nasr A. M. Hafz,Jie Zhang,Liming Chen +12 more
TL;DR: In this paper, the experimentally generated electron bunch from laser-wakefield acceleration (LWFA) with a charge of 620 pC and a maximum energy up to 0.6
Journal ArticleDOI
Resonantly Enhanced Betatron Hard X-rays from Ionization Injected Electrons in a Laser Plasma Accelerator.
Kai Huang,Y. F. Li,Dazhang Li,Liming Chen,M. Z. Tao,Yong Ma,J. R. Zhao,M. H. Li,Mingwei Chen,Mohammad Mirzaie,Nasr A. M. Hafz,Thomas Sokollik,Zheng-Ming Sheng,Jie Zhang +13 more
TL;DR: A new method for bright hard x-ray emission via ionization injection from the K-shell electrons of nitrogen into the accelerating bucket is presented, enabling the single-stage betatron radiation from LWFA to be extended to bright γ-ray radiation, which is beyond the capability of 3rd generation synchrotrons.
Journal ArticleDOI
Ultrafast Imaging of Laser Driven Shock Waves using Betatron X-rays from a Laser Wakefield Accelerator
J. C. Wood,David J. Chapman,Kristjan Poder,Nelson Lopes,Nelson Lopes,Michael E. Rutherford,Michael E. Rutherford,Thomas G. White,Felicie Albert,K. Behm,Nicola Booth,J. S. J. Bryant,Peta Foster,S. H. Glenzer,E.G. Hill,K. Krushelnick,Zulfikar Najmudin,B. B. Pollock,S. J. Rose,William Schumaker,Robbie Scott,Mark Sherlock,Alexander Thomas,Z. Zhao,Daniel E. Eakins,Daniel E. Eakins,Stuart Mangles +26 more
TL;DR: In this article, the first experiment to utilize betatron radiation to image a rapidly evolving phenomenon by using it to radiograph a laser driven shock wave in a silicon target is described.
Journal ArticleDOI
Simultaneous generation of quasi-monoenergetic electron and betatron X-rays from nitrogen gas via ionization injection
Kai Huang,Dazhang Li,Wenchao Yan,M. H. Li,M. Z. Tao,Zi-Yu Chen,X. L. Ge,Feng-Rui Liu,Yong Ma,J. R. Zhao,Nasr A. M. Hafz,Jie Zhang,Liming Chen +12 more
TL;DR: In this article, 60 TW Ti: sapphire laser pulses with 4 mm long supersonic nitrogen gas jet 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%.
References
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Journal ArticleDOI
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