title: Electric field-perturbation measurement of the interaction between two laser-induced plasmas.
abstract: The interaction between two ns-laser-induced plasmas in air at the early-stage of expansion has been analyzed by using a method based on the direct measurement of the perturbation of an externally applied electric field. In this experimental method, the plasmas were produced by focusing two laser beams between the plates of a parallel-plane-charged capacitor. These plasmas produce a perturbation in the electric field of the capacitor which can be measured as a voltage change across a resistor connected to the ground plate. It was found that for delays shorter than 5 ns, the interaction between plasmas is mainly due to the interaction of the dipole-charge distribution of each plasma. For longer time delays, the shielding effect was dominant.
authors.affiliation: CCADET, Universidad Nacional Autónoma de México (UNAM), A.P. 70-186, México DF, CP 04510, México.
authors.forename: C
authors.initials: C
authors.lastname: Sánchez-Aké
authors.forename: F
authors.initials: F
authors.lastname: Bredice
authors.forename: M
authors.initials: M
authors.lastname: Villagrán-Muniz