Optimization of positrons generation based on laser wakefield electron acceleration
| Autor: | Kegong Dong, Han Dan, Yan Yonghong, Yuqiu Gu, Bin Zhu, Yuchi Wu, Zhang Tiankui |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Nuclear and High Energy Physics Physics and Astronomy (miscellaneous) Astrophysics::High Energy Astrophysical Phenomena Pulse duration Charge density Surfaces and Interfaces Radiation Laser 01 natural sciences 010305 fluids & plasmas law.invention Nuclear physics Positron law 0103 physical sciences Femtosecond lcsh:QC770-798 Physics::Accelerator Physics lcsh:Nuclear and particle physics. Atomic energy. Radioactivity High Energy Physics::Experiment Production (computer science) Laser power scaling Atomic physics 010306 general physics |
| Zdroj: | Physical Review Accelerators and Beams, Vol 19, Iss 8, p 081303 (2016) |
| ISSN: | 2469-9888 |
| DOI: | 10.1103/physrevaccelbeams.19.081303 |
| Popis: | Laser based positron represents a new particle source with short pulse duration and high charge density. Positron production based on laser wakefield electron acceleration (LWFA) has been investigated theoretically in this paper. Analytical expressions for positron spectra and yield have been obtained through a combination of LWFA and cascade shower theories. The maximum positron yield and corresponding converter thickness have been optimized as a function of driven laser power. Under the optimal condition, high energy ($g100\text{ }\text{ }\mathrm{MeV}$) positron yield up to $5\ifmmode\times\else\texttimes\fi{}{10}^{11}$ can be produced by high power femtosecond lasers at ELI-NP. The percentage of positrons shows that a quasineutral electron-positron jet can be generated by setting the converter thickness greater than 5 radiation lengths. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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