Temporal evolution of femtosecond laser induced plasma filament in air and N{sub 2}

Journal Article · Sun Dec 08 23:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4838775· OSTI ID:22217760

Papeer, J.; Botton, M.; Zigler, A. ^[1]; Gordon, D.; Sprangle, P. ^[2]

---

1. Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel)
2. Plasma Division, Naval Research Lab, Washington, DC 20375 (United States)

We present single shot, high resolution, time-resolved measurements of the relaxation of laser induced plasma filaments in air and in N{sub 2} gas. Based on the measurements of the time dependent electromagnetic signal in a waveguide, an accurate and simple derivation of the electron density in the filament is demonstrated. This experimental method does not require prior knowledge of filament dimensions or control over its exact spatial location. The experimental results are compared to numerical simulations of air plasma chemistry. Results reveal the role of various decay mechanisms including the importance of O{sub 4}{sup +} molecular levels.

• OSTI ID: 22217760
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 24 Vol. 103; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AIR
COMPUTERIZED SIMULATION
CONTROL
ELECTRON DENSITY
LASERS
NITROGEN
PLASMA DENSITY
PLASMA FILAMENT
PLASMA PRODUCTION
PROBES
RELAXATION
SIGNALS
TIME RESOLUTION
WAVEGUIDES