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Title: Characteristics of plasma plume in ultrafast laser ablation with a weakly ionized air channel

Abstract

We report the influence of femtosecond (fs) laser weakly ionized air channel on characteristics of plasma induced from fs-laser ablation of solid Zr metal target. A novel method to create high temperature, low electron density plasma with intense elemental emission and weak bremsstrahlung emission was demonstrated. Weakly ionized air channel was generated as a result of a non-linear phenomenon. Two-dimensional time-resolved optical-emission images of plasma plumes were taken for plume dynamics analysis. Dynamic physical properties of filament channels were simulated. In particular, we investigated the influence of weakly ionized air channel on the evolution of solid plasma plume. Plasma plume splitting was observed whilst longer weakly ionized air channel formed above the ablation spot. The domination mechanism for splitting is attributed to the long-lived underdense channel created by fs-laser induced weakly ionization of air. The evolutions of atomic/molecular emission intensity, peak broadening, and plasma temperature were analyzed, and the results show that the part of plasma entering weakly ionized air channel features higher initial temperature, lower electron density and faster decay.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1436837
Alternate Identifier(s):
OSTI ID: 1457009
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Name: Optics Express Journal Volume: 26 Journal Issue: 10; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; spectroscopy; laser induced breakdown; ultrafast phenomena; self-focusing

Citation Formats

Hou, Huaming, Yang, Bo, Mao, Xianglei, Zorba, Vassilia, Ran, Pengxu, and Russo, Richard E. Characteristics of plasma plume in ultrafast laser ablation with a weakly ionized air channel. United States: N. p., 2018. Web. doi:10.1364/OE.26.013425.
Hou, Huaming, Yang, Bo, Mao, Xianglei, Zorba, Vassilia, Ran, Pengxu, & Russo, Richard E. Characteristics of plasma plume in ultrafast laser ablation with a weakly ionized air channel. United States. doi:10.1364/OE.26.013425.
Hou, Huaming, Yang, Bo, Mao, Xianglei, Zorba, Vassilia, Ran, Pengxu, and Russo, Richard E. Thu . "Characteristics of plasma plume in ultrafast laser ablation with a weakly ionized air channel". United States. doi:10.1364/OE.26.013425.
@article{osti_1436837,
title = {Characteristics of plasma plume in ultrafast laser ablation with a weakly ionized air channel},
author = {Hou, Huaming and Yang, Bo and Mao, Xianglei and Zorba, Vassilia and Ran, Pengxu and Russo, Richard E.},
abstractNote = {We report the influence of femtosecond (fs) laser weakly ionized air channel on characteristics of plasma induced from fs-laser ablation of solid Zr metal target. A novel method to create high temperature, low electron density plasma with intense elemental emission and weak bremsstrahlung emission was demonstrated. Weakly ionized air channel was generated as a result of a non-linear phenomenon. Two-dimensional time-resolved optical-emission images of plasma plumes were taken for plume dynamics analysis. Dynamic physical properties of filament channels were simulated. In particular, we investigated the influence of weakly ionized air channel on the evolution of solid plasma plume. Plasma plume splitting was observed whilst longer weakly ionized air channel formed above the ablation spot. The domination mechanism for splitting is attributed to the long-lived underdense channel created by fs-laser induced weakly ionization of air. The evolutions of atomic/molecular emission intensity, peak broadening, and plasma temperature were analyzed, and the results show that the part of plasma entering weakly ionized air channel features higher initial temperature, lower electron density and faster decay.},
doi = {10.1364/OE.26.013425},
journal = {Optics Express},
number = 10,
volume = 26,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1364/OE.26.013425

Citation Metrics:
Cited by: 1 work
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Figures / Tables:

Fig. 1 Fig. 1: Experimental setup.

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.