@article{oai:repo.qst.go.jp:00048619,
 author = {Tao, Mengze and ホァン, カイ and Li, Dazhang and Li, Yifei and Guo, Xin and Ma, Yong and Zhao, Jiarui and Li, Minghua and Wang, Jinguang and Hafz, Nasr and Zhang, Jie and Chen, Liming and 黄 開},
 issue = {1},
 journal = {Journal of medical physics and applied sciences},
 month = {Feb},
 note = {Purpose: To propose a promising alternative for conventional accelerators for
high energy electron radiation therapy by generating quasi-mono-energetic
electron beams.
Methods: Electron beams with energy up to hundred MeV, 1.8% energy spread,
125 pC charges and a few mrad divergences have been achieved from a 3-mmlong
clustered gas plasma, driven by laser pulse with peak power up to 100 TW.
Optimization of experimental parameters, such as laser contrast and laser-plasma
interaction timing leads to stable laser propagation and high-quality electron
beams.
Results: Clustered gas, in addition to the self-focusing effect, owns two important
features: local solid electron density and efficient absorption of ultra-short laser
pulses. Therefore, high ionization levels and high electron densities could generate
high-charge energetic electron beams. Our experiment has verified that clusters
in the gas jet influence the laser propagation and Wakefield evolution, producing
stable laser guiding and good quality electron beams.
Conclusion: The results demonstrated that the laser-driven clustered gas target
provides a unique method for electron injection and has great potential in
generating mono-energetic collimated electron beams with large beam charge.
Stable and reproducible mono-energetic electron beams with sufficient electron
intensities are required in medical applications, e.g., radiotherapy. Many
engineering issues remain to be solved before clinical application, but laseraccelerated
electron beams present a promising scheme for future radiation
therapy.},
 pages = {3-1--3-5},
 title = {Quasi-Mono-Energetic Electron Beams from a Laser–Driven Argon Clustered Gas Target for Radiation Medicine},
 volume = {2},
 year = {2017}
}