Light Scattering Measurements of Energy Partitioning in Laser Air Sparks**Student support provided by a National Defense Science and Engineering Graduate Fellowship. Conference Paper

abstract

• Laser light scattering provides a powerful diagnostic of plasmas and fluids in the form of Thomson and Rayleigh scattering1. In this work, we present time and space resolved collective Thomson scattering measurements of T_eand n_ein the plasma core of atmospheric pressure air sparks generated with a 10ns pulse, 1064nm Nd:YAG laser. In the shockwave region, a combination of Rayleigh scattering and Filtered Rayleigh scattering are used to spatially and temporally resolve temperature, radial velocity and density. Filtered Rayleigh scattering is a technique whereby scattered light is spectrally filtered by an atomic or molecular gas to indirectly extract line shape information. These measurements cover a laser energy range of 30mJ to 100mJ and a temporal duration of 1-5s after spark formation.

name of conference

• 2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS)

authors

• Limbach, Christopher
• Miles, Richard

published proceedings

• 2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS)

author list (cited authors)

• Limbach, C. M., & Miles, R. B.

citation count

• 0

complete list of authors

• Limbach, Christopher M||Miles, Richard B

publication date

• May 2014

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• IEEE International Conference on Plasma Science  Journal

keywords

• Atmospheric Pressure
• Atomic Gas
• Energy 30 Mj To 100 Mj
• Energy Measurement
• Energy Partitioning
• Filtered Rayleigh Scattering
• Laser Air Sparks
• Laser Energy Range
• Light Scattering Measurement
• Measurement By Laser Beam
• Molecular Gas
• Nd:yag Laser
• Plasma Density
• Plasma Diagnostic
• Plasma Diagnostics
• Plasma Measurements
• Plasma Shock Waves
• Plasma Temperature
• Plasmas
• Pressure 1 Atm
• Radial Velocity
• Rayleigh Scattering
• Scattering
• Shock Wave
• Space Resolved Collective Thomson Scattering
• Spark Formation
• Sparks
• Temperature Measurement
• Time 1 Mus To 5 Mus
• Time 10 Ns
• Time Resolved Collective Thomson Scattering
• Wavelength 1064 Nm

Digital Object Identifier (DOI)

• 10.1109/plasma.2014.7012262

International Standard Book Number (ISBN) 13

• 9781479927111

start page

• 1

end page

• 1

URL

• http://dx.doi.org/10.1109/plasma.2014.7012262