skip to main content

SciTech ConnectSciTech Connect

Title: Plasma temperature clamping in filamentation laser induced breakdown spectroscopy

Ultrafast laser filament induced breakdown spectroscopy is a very promising method for remote material detection. We present characteristics of plasmas generated in a metal target by laser filaments in air. Our measurements show that the temperature of the ablation plasma is clamped along the filamentation channel due to intensity clamping in a filament. Nevertheless, significant changes in radiation intensity are noticeable, and this is essentially due to variation in the number density of emitting atoms. The present results also partly explains the reason for the occurrence of atomic plume during fs LIBS in air compared to long-pulse ns LIBS.
Authors:
; ;
Publication Date:
OSTI Identifier:
1267594
Report Number(s):
PNNL-SA-112002
Journal ID: ISSN 1094-4087; DN2001000
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Optics Express; Journal Volume: 23; Journal Issue: 21
Publisher:
Optical Society of America (OSA)
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
Laser ablation; Molecular formation; AlO; Emission spectroscopy; 2D fast imaging