| Autor: |
Qin, Zhiyong, Yu, Changhai, Wang, Wentao, Liu, Jiansheng, Li, Wentao, Qi, Rong, Zhang, Zhijun, Liu, Jiaqi, Fang, Ming, Feng, Ke, Wu, Ying, Ke, Lintong, Chen, Yu, Xu, Yi, Leng, Yuxin, Wang, Cheng, Li, Ruxin, Xu, Zhizhan |
| Předmět: |
|
| Zdroj: |
Physics of Plasmas; 2018, Vol. 25 Issue 2, p1-1, 1p, 1 Diagram, 3 Graphs |
| Abstrakt: |
By designing a cascaded laser wakefield accelerator, high-quality monoenergetic electron beams (e beams) with peak energies of 340–360 MeV and rms divergence of <0.3 mrad were produced. Based on this accelerator, the e-beam betatron radiation spectra were measured exactly via the single-photon counting technique to diagnose the e-beam transverse emittance in a single shot. The e-beam transverse size in the wakefield was estimated to be ∼0.35 μm by comparing the measured X-ray spectra with the analytical model of synchrotron-like radiation. By combining the measured e-beam energy and divergence, the normalized transverse emittance was estimated to be as low as 56 μm mrad and consistent with particle-in-cell simulations. These high-energy ultralow-emittance e beams hold great potential applications in developing free electron lasers and high-energy X-ray and gamma ray sources. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
