| Autor: |
Y.F.Li, D.Z.Li, L.M.Chen, M.Z.Tao, Y.Ma, J.R.Zhao, M.H.Li, M.Chen, M.Mirzaie, N.Hafz, Sokollik, T., Z.M.Sheng, J.Zhang |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
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| Zdroj: |
Scientific Reports. 6:27633-27633-8 |
| Popis: |
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 × 108/shot and 108 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 3rd generation synchrotrons. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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