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Synchrotron radiation, pair production, and longitudinal electron motion during 10-100 PW laser solid interactions
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Brady, C. S., Ridgers, C. P., Arber, T. D. and Bell, A. R. (2014) Synchrotron radiation, pair production, and longitudinal electron motion during 10-100 PW laser solid interactions. Physics of Plasmas, Volume 21 (Number 3). Article number 033108. doi:10.1063/1.4869245 ISSN 1070-664X.
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Official URL: http://dx.doi.org/10.1063/1.4869245
Abstract
At laser intensities above 1023 W/cm2, the interaction of a laser with a plasma is qualitatively different to the interactions at lower intensities. In this intensity regime, solid targets start to become relativistically underdense, gamma-ray production by synchrotron emission starts to become an important feature of the dynamics and, at even higher intensities, electron-positron pair production by the non-linear Breit-Wheeler process starts to occur. In this paper, an analysis is presented of the effects of target density, laser intensity, target preplasma properties, and other parameters on the conversion efficiency, spectrum, and angular distribution of gamma-rays by synchrotron emission. An analysis of the importance of Breit-Wheeler pair production is also presented. Target electron densities between 1022 cm−3 and 5 × 1024 cm−3 and laser intensities covering the range between 1021 W/cm2 (available with current generation laser facilities) and 1024 W/cm2 (upper intensity range expected from the ELI facility are considered. Results are explained in terms of the behaviour of the head of the laser pulse as it interacts with the target.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| Journal or Publication Title: | Physics of Plasmas | ||||||||
| Publisher: | American Institute of Physics | ||||||||
| ISSN: | 1070-664X | ||||||||
| Official Date: | 25 March 2014 | ||||||||
| Dates: |
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| Volume: | Volume 21 | ||||||||
| Number: | Number 3 | ||||||||
| Article Number: | Article number 033108 | ||||||||
| DOI: | 10.1063/1.4869245 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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