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Resonantly Enhanced Betatron Hard X-rays from Ionization Injected Electrons in a Laser Plasma Accelerator.

Abstract：

:Ultrafast betatron x-ray emission from electron oscillations in laser wakefield acceleration (LWFA) has been widely investigated as a promising source. Betatron x-rays are usually produced via self-injected electron beams, which are not controllable and are not optimized for x-ray yields. Here, we present a new method for bright hard x-ray emission via ionization injection from the K-shell electrons of nitrogen into the accelerating bucket. A total photon yield of 8 × 10(8)/shot and 10(8 )photons with energy greater than 110 keV is obtained. The yield is 10 times higher than that achieved with self-injection mode in helium under similar laser parameters. The simulation suggests that ionization-injected electrons are quickly accelerated to the driving laser region and are subsequently driven into betatron resonance. The present scheme enables the single-stage betatron radiation from LWFA to be extended to bright γ-ray radiation, which is beyond the capability of 3(rd) generation synchrotrons.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Huang K,Li YF,Li DZ,Chen LM,Tao MZ,Ma Y,Zhao JR,Li MH,Chen M,Mirzaie M,Hafz N,Sokollik T,Sheng ZM,Zhang J

doi

10.1038/srep27633

subject

Has Abstract

pub_date

2016-06-08 00:00:00

pages

27633

issn

2045-2322

pii

srep27633

journal_volume

6

pub_type

杂志文章

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