Modulational instability of ultraintense laser pulses in electron-positron-ion plasmas including vacuum polarization effect
- 1 June 2020
- journal article
- research article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 62 (6), 065004
- https://doi.org/10.1088/1361-6587/ab81da
Abstract
A non-linear equation for describing the dynamics of slowly varying envelope of ultra-intense lasers in electron-positron-ion plasmas is derived, taking into account the vacuum polarization effect. Then the modulation instability of ultra-intense laser pulses in the plasmas is investigated. Theoretical results show that the growth rate of modulation instability is originated from the relativistic ponderomotive force of lasers and the vacuum polarization effect. In the regime of different physical parameters, there is an interplay of the two effects. The dependence of the growth rate on the intensity of lasers, the temperature of electrons (positrons), the component of plasmas and the vacuum polarization effect is numerically studied.Keywords
Funding Information
- the Natural Science Foundation of China (Grant No. 11665009, 11964008 and 11764035)
- The Science and Technology Planning Project of Guizhou Province (Grant No. [2017]1132 and [2017]1134)
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