Microwave radiation mechanism in a pulse-laser-irradiated Cu foil target revisited

Autor:	Jun Li, Jian-Feng Li, Zi-Yu Chen, Qi-Xian Peng
Rok vydání:	2011
Předmět:	Physics Range (particle radiation) Plasma Radiation Condensed Matter Physics Laser Atomic and Molecular Physics and Optics Pulsed laser deposition law.invention law Quadrupole Physics::Atomic Physics Irradiation Atomic physics Mathematical Physics Microwave
Zdroj:	Physica Scripta. 83:055503
ISSN:	1402-4896 0031-8949
DOI:	10.1088/0031-8949/83/05/055503
Popis:	The microwave radiation mechanism in a Cu-based foil target irradiated by an intense laser pulse has been investigated. Microwave emission in the frequency range 0.5–4 GHz has been observed from a 200 ps laser pulse of intensity about 1012 W cm− 2 normally incident on the target surface. The total microwave power and energy emitted from the interaction were found to be about 0.4 W and 2 nJ, respectively, corresponding to an efficiency of coupling laser energy to microwave energy of 2×10−8. The result agrees well with quadrupole radiation calculated based on a circuit model of a laser plasma, which indicates that the radiative process can be explained by magnetic dipole or electric quadrupole radiation from the laser-produced symmetric poloidal current distribution at the plasma–target interface.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e0ba87c90cafe7afe10cc56d1a2cb8b2 https://doi.org/10.1088/0031-8949/83/05/055503 Zobrazit plný text záznamu