Study of magnetic confinement in laser-induced plasmas by optical emission spectroscopy and fast photography

X. K. Shen, Yongfeng Lu, T. Gebre

Research output: Contribution to conferencePaper

Abstract

The dynamics and magnetic confinement effects of laser-induced plasmas expanding across an external transverse magnetic field were investigated by both optical emission spectroscopy and fast photography. KrF excimer laser pulses with a pulse duration of 23 ns and a wavelength of 248 nm were used to produce plasmas from Cu targets. Various optical emission lines show an obvious enhancement in the intensity of optical emission when a magnetic field of 0.8 Tesla is applied. Temporal evolution of the optical emission lines shows a continuous enhancement in emission intensity at time delays of 3-20 μs after the incident laser pulse. The enhancement in the optical emission from the Cu plasmas was presumably due to the increase in the effective plasma density as a result of magnetic confinement. Fast photography of the laser-induced Cu plasmas was performed using a Nikon macro lens and Andor intensified CCD camera. It shows that the plasma splits into two parts after gate delay of around 4 μs both with and without a magnetic field. With the presence of a magnetic field, the two parts of the plasma were confined and recombined with each other after gate delay of around 18 μs. While without the presence of a magnetic filed, the two parts kept separated as gate delay increased.

Original languageEnglish (US)
StatePublished - Dec 1 2006
EventICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics - Scottsdale, AZ, United States
Duration: Oct 30 2006Nov 2 2006

Conference

ConferenceICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics
CountryUnited States
CityScottsdale, AZ
Period10/30/0611/2/06

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Plasma confinement
Optical emission spectroscopy
Photography
photography
laser
spectroscopy
Plasmas
plasma
Lasers
Magnetic fields
Laser pulses
magnetic field
Plasma density
Excimer lasers
CCD cameras
Macros
temporal evolution
Lenses
Time delay
Wavelength

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Electrical and Electronic Engineering

Cite this

Shen, X. K., Lu, Y., & Gebre, T. (2006). Study of magnetic confinement in laser-induced plasmas by optical emission spectroscopy and fast photography. Paper presented at ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Scottsdale, AZ, United States.

Study of magnetic confinement in laser-induced plasmas by optical emission spectroscopy and fast photography. / Shen, X. K.; Lu, Yongfeng; Gebre, T.

2006. Paper presented at ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Scottsdale, AZ, United States.

Research output: Contribution to conferencePaper

Shen, XK, Lu, Y & Gebre, T 2006, 'Study of magnetic confinement in laser-induced plasmas by optical emission spectroscopy and fast photography' Paper presented at ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Scottsdale, AZ, United States, 10/30/06 - 11/2/06, .
Shen XK, Lu Y, Gebre T. Study of magnetic confinement in laser-induced plasmas by optical emission spectroscopy and fast photography. 2006. Paper presented at ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Scottsdale, AZ, United States.
Shen, X. K. ; Lu, Yongfeng ; Gebre, T. / Study of magnetic confinement in laser-induced plasmas by optical emission spectroscopy and fast photography. Paper presented at ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Scottsdale, AZ, United States.
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