Ambient fields generated by a laser spark

• Autorzy: Rohlena K. , Mašek M.

Identyfikatory

DOI

10.1515/nuka-2016-0021

• Konferencja: PLASMA-2015 International Conference on Research and Applications of Plasmas (7-11 September 2015 ; Warsaw, Poland)
• Języki publikacji: EN

Abstrakty

EN

The electric and magnetic fields surrounding a laser spark formed after an optical breakdown due to a focused nanosecond laser beam in a gaseous environment are examined in order to assess their possible influence on the processes going on in the gas medium, mainly chemical reactions triggered by the spark plasma radiation. The magnetic field is generated by the standard mechanism of crossed electron density and temperature gradients, the electric field is supposed to be produced by the plasma polarization due to its radial expansion across the self-generated magnetic field. A simple model of spark plasma formation near the tip of the focal cone is assumed, with a delayed breakdown, which allows the focused laser light to sweep the whole volume of the forming spark right down to the focal caustic and thus to form a centimeter long plasma cone. In this conical geometry, the value of plasma electric dipole moment is evaluated as a measurable quantity as well as approximate values of the electric and magnetic field near the focal caustic, where they both tend to grow in magnitude.

Słowa kluczowe

EN

laser spark; radiation chemistry; field generation

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2016
• Tom: Vol. 61, No. 2
• Strony: 119--124
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Rohlena K.

• Institute of Physics ASCR (Fyzikální ústav AVČR), Na Slovance 2, 182 21 Prague 8 – Libeň, Czech Republic, Tel.: [phone], Fax: [phone]

autor

Mašek M.

• Institute of Physics ASCR (Fyzikální ústav AVČR), Na Slovance 2, 182 21 Prague 8 – Libeň, Czech Republic, Tel.: [phone], Fax: [phone]

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.