Characterization of a laser-induced plasma by spatially resolved spectroscopy of neutral atom and ion emissions.

Aguilera, J.A.; Aragón, C.

doi:10.1016/j.sab.2004.08.003

Cited by 306 publications

(184 citation statements)

References 29 publications

Supporting

Mentioning

163

Contrasting

Unclassified

Order By: Relevance

“…Using the intensity of line emission from a single species, it provides the excitation temperature of the plasma. 19,20 In its simplest form, only two emission lines are necessary to obtain the excitation temperature, provided there is sufficient difference between their upper energy levels. Boltzmann plot, however, uses several emission lines, thus providing a more accurate estimate of electron temperature.…”

Section: Temperature Measurementmentioning

confidence: 99%

“…A linear fit to experimental data not only validates the assumption of a Maxwellian electron distribution, but serves as a check for errors in line assignment or transition probability value. 19 A second method used to obtain the plasma temperature is based on the Saha equation. This combines the number densities of consecutive ionization stages of a gas with their Maxwell-Boltzmann factor, resulting in the population distribution for each constituent species.…”

Section: Temperature Measurementmentioning

confidence: 99%

See 1 more Smart Citation

Spectroscopic characterization of laser-induced tin plasma

Harilal

O'Shay

Tillack

et al. 2005

Journal of Applied Physics

157

View full text Add to dashboard Cite

Optical emission spectroscopic studies have been carried out on a tin plasma generated using 1064-nm, 8-ns pulses from a Nd:yttrium aluminum garnet laser. Temperature and density were estimated from the analysis of spectral data. The temperature measurements have been performed by Boltzmann diagram method using singly ionized Sn lines, while density measurements were made using the Stark broadening method. An initial temperature of 3.2 eV and density of 7.7×1017cm−3 were measured. Temporal and spatial behaviors of electron temperature and density in the laser-generated tin plasma have been analyzed. Time evolutions of density and temperature are found to decay adiabatically at early times. The spatial variation of density shows approximately 1∕z dependence. The time-integrated temperature exhibits an appreciable rise at distances greater than 7 mm. This may be caused by the deviation from local thermodynamic equilibrium at larger distances from the target surface.

show abstract

Section: Temperature Measurementmentioning

confidence: 99%

Section: Temperature Measurementmentioning

confidence: 99%

Spectroscopic characterization of laser-induced tin plasma

Harilal

O'Shay

Tillack

et al. 2005

Journal of Applied Physics

157

View full text Add to dashboard Cite

show abstract

“…The observed increase in the linewidths with increasing laser pulse duration can be associated with an increase in the number of collisions between the species [9][10][11][12][13][14] . This would mean that plasmas generated by longer pulses have a higher level of electron density, which can be explained assuming that there is an interaction between the incident radiation and the generated plasma.…”

Section: Spectral Identification and Linewidths Of Cu Emission As A Fmentioning

confidence: 99%

Time resolving imaging spectroscopy applied to the analysis of plasmas generated by pulsed lasers

Alvira

Ponce

Arronte

et al. 2011

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Abstract. Start your abstract here… Time resolved imaging spectroscopy were used to study the spatial and temporal evolution of LIBS (Laser Induced Breakdown Spectroscopy) plasmas generated in Cu substrates by laser pulses of different duration. Long laser pulses (microsecond) and short laser pulses (nanosecond) as well as multipulse emission were used for excitation. Analysis was made by using an imaging spectrometer with time resolved detection. Results show that the use of long laser excitation pulses produce emission spectra with the same signal to noise ratio, but with lower resolution than those produced with shorter ones. The different species generated in LIBS experiments as neutral or single ionized have a different spatial distribution inside the plasma. We demonstrated that using spatial discrimination procedures is possible to obtain spectra with the same signal to noise ratio than those obtained with a gating detector. In this case an appreciable advantage in cost reduction is obtained by replacing the gating detector by a cheap screen.

show abstract

“…The calculation of plasma temperature is a crucial point of the procedure. To increase the reliability of temperature calculation, Saha-Boltzmann method can be used [19,20]. In Saha-Boltzmann method, lines from atoms and ions of the same element are included in the linear regression for enlarging the difference in the excitation energies of upper levels thus improving the statistics.…”

Section: Introductionmentioning

confidence: 99%