Radiation damping effects on the interaction of ultraintense laser pulses with an overdense plasma

Zhidkov, A. J.*; Koga, J. K.; Sasaki, Akira; Uesaka, Mitsuru*

A strong effect of radiation damping on the interaction of an ultra-intense laser pulse with an overdense plasma slab is found and studied via a relativistic particle-in-cell simulation including ionization. Hot electrons generated by the irradiation of a laser pulse with a radiance of $Ilambda^2>10^{22}$ Wm/cm and duration of 20 fs can convert more than 35% of the laser energy to radiation. This incoherent X-ray emission lasts for only the pulse duration and can be intense. The radiation efficiency is shown to increase nonlinearly with laser intensity. Similar to cyclotron radiation, the radiation damping may restrain the maximal energy of relativistic electrons in ultra-intense-laser-produced plasmas.

Language	:	English
Journal	:	Physical Review Letters
Volume	:	88
Number	:	18
Pages	:	p.185002_1 - 185002_4
Publication Year/Month	:	2002/05
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Paper URL	:	https://doi.org/10.1103/PhysRevLett.88.185002
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	放射減衰; 粒子シミュレーション; 超高強度レーザー
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Registration No. : A20020044
JAEA Abstracts No. : 300989
Paper Submission No. : 19435

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