Identifying the source of super-high energetic electrons in the presence of pre-plasma in laser–matter interaction at relativistic intensities
Abstract
The generation of super-high energetic electrons influenced by pre-plasma in relativistic intensity laser–matter interaction is studied in a one-dimensional slab approximation with particle-in-cell simulations. Different pre-plasma scale lengths and laser intensities are considered, showing an increase in both particle number and cut-off kinetic energy of electrons with the increase of pre-plasma scale length and laser intensity, the cut-off kinetic energy greatly exceeding the corresponding laser ponderomotive energy. A two-stage electron acceleration model is proposed to explain the underlying physics. The first stage is attributed to the synergetic acceleration by longitudinal electric field and counter-propagating laser pulses, and a scaling law is obtained with efficiency depending on the pre-plasma scale length and laser intensity. These electrons pre-accelerated in the first stage could build up an intense electrostatic potential barrier with maximal value several times as large as the initial electron kinetic energy. Some of the energetic electrons could be further accelerated by reflection off the electrostatic potential barrier, with their finial kinetic energies significantly higher than the values pre-accelerated in the first stage.
- Authors:
-
- Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Optics and Fine Mechanics, State Key Lab. of High Field Laser Physics
- Univ. of California, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE; National Natural Science Foundation of China (NSFC); National Basic Research Program of China
- OSTI Identifier:
- 1328547
- Alternate Identifier(s):
- OSTI ID: 1328548; OSTI ID: 1425833
- Grant/Contract Number:
- NA0001858; 11304331; 11174303; 61221064
- Resource Type:
- Published Article
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Name: Nuclear Fusion Journal Volume: 57 Journal Issue: 1; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- IAEA
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; plasma physics; intense laser; plasma heating
Citation Formats
Wu, D., Krasheninnikov, S. I., Luan, S. X., and Yu, W. Identifying the source of super-high energetic electrons in the presence of pre-plasma in laser–matter interaction at relativistic intensities. IAEA: N. p., 2016.
Web. doi:10.1088/0029-5515/57/1/016007.
Wu, D., Krasheninnikov, S. I., Luan, S. X., & Yu, W. Identifying the source of super-high energetic electrons in the presence of pre-plasma in laser–matter interaction at relativistic intensities. IAEA. https://doi.org/10.1088/0029-5515/57/1/016007
Wu, D., Krasheninnikov, S. I., Luan, S. X., and Yu, W. Mon .
"Identifying the source of super-high energetic electrons in the presence of pre-plasma in laser–matter interaction at relativistic intensities". IAEA. https://doi.org/10.1088/0029-5515/57/1/016007.
@article{osti_1328547,
title = {Identifying the source of super-high energetic electrons in the presence of pre-plasma in laser–matter interaction at relativistic intensities},
author = {Wu, D. and Krasheninnikov, S. I. and Luan, S. X. and Yu, W.},
abstractNote = {The generation of super-high energetic electrons influenced by pre-plasma in relativistic intensity laser–matter interaction is studied in a one-dimensional slab approximation with particle-in-cell simulations. Different pre-plasma scale lengths and laser intensities are considered, showing an increase in both particle number and cut-off kinetic energy of electrons with the increase of pre-plasma scale length and laser intensity, the cut-off kinetic energy greatly exceeding the corresponding laser ponderomotive energy. A two-stage electron acceleration model is proposed to explain the underlying physics. The first stage is attributed to the synergetic acceleration by longitudinal electric field and counter-propagating laser pulses, and a scaling law is obtained with efficiency depending on the pre-plasma scale length and laser intensity. These electrons pre-accelerated in the first stage could build up an intense electrostatic potential barrier with maximal value several times as large as the initial electron kinetic energy. Some of the energetic electrons could be further accelerated by reflection off the electrostatic potential barrier, with their finial kinetic energies significantly higher than the values pre-accelerated in the first stage.},
doi = {10.1088/0029-5515/57/1/016007},
journal = {Nuclear Fusion},
number = 1,
volume = 57,
place = {IAEA},
year = {Mon Oct 03 00:00:00 EDT 2016},
month = {Mon Oct 03 00:00:00 EDT 2016}
}
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