Spatio-temporal mapping of ablated species in ultrafast laser-produced graphite plasmas

Journal Article · Mon May 28 00:00:00 EDT 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4722939· OSTI ID:22025569

Al-Shboul, K F; Harilal, S S; Hassanein, A ^[1]

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1. Center for Materials Under Extreme Environment, School of Nuclear Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)

We studied the spatial and temporal distributions of ionic, neutral, and molecular species generated by femtosecond laser produced plasma under varying ambient nitrogen gas pressures. Plasmas were generated by irradiating planar graphite targets using 40 fs pulses of 800 nm radiation from a Ti:Sapphire laser. The results show that in the presence of an ambient gas, the molecular species spatial extension and lifetime are directly correlated to the evolution of excited ions. The present studies also provide valuable insights into the evolution history of various species and their excitation during ultrafast laser ablation.

• OSTI ID: 22025569
• Journal Information: Applied Physics Letters, Vol. 100, Issue 22; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
EXCITATION
GRAPHITE
LASER TARGETS
LASER-PRODUCED PLASMA
LIFETIME
NITROGEN
PLASMA DIAGNOSTICS
PLASMA PRESSURE
PLASMA PRODUCTION
PULSES
SAPPHIRE
SPATIAL DISTRIBUTION
SPECTROSCOPY
TIME-OF-FLIGHT METHOD