Ion‐expansion energy spectra correlated to laser plasma parameters

1973 ◽  
Vol 44 (5) ◽  
pp. 2275-2283 ◽  
Author(s):  
J. N. Olsen ◽  
G. W. Kuswa ◽  
E. D. Jones
Keyword(s):  
Laser Plasma ◽  
Energy Spectra ◽  
Plasma Parameters ◽  
Expansion Energy

scholarly journals Plasma ion spectra from laser produced plasmas at λ = 1·06 μm and λ =0·53 μm

1986 ◽  
Vol 4 (2) ◽  
pp. 239-247 ◽  
Author(s):  
R. Dinger ◽  
K. Rohr ◽  
H. Weber
Keyword(s):  
Laser Plasma ◽  
Energy Spectra ◽  
Absorption Mechanism ◽  
Experimental Conditions ◽  
Inverse Bremsstrahlung ◽  
Laser Plasma Interactions ◽  
Ion Energies ◽  
Dependent Absorption ◽  
Wavelength Light ◽  
Ablated Mass

Wavelength dependent absorption in laser-plasma interactions was investigated by measuring the energy spectra of freely expanding plasmas in their asymptotic stage of expansion. The experiments were performed with both 1·06- and 0·53-μm-wavelength light incident on flat tantalum targets. The experimental conditions were chosen adequately to ensure that inverse bremsstrahlung was the dominating absorption mechanism. As a result it is found that the absorption is enhanced at the shorter wavelength by a factor of 1·3. Primarily this leads to a higher ionisation state of the plasma and higher kinetic ion energies and temperatures, respectively, while the amount of ablated mass is approximately the same.

Dependences of the energy spectra of gold and silver ions on their concentration in a multicomponent laser plasma

1991 ◽  
Vol 21 (1) ◽  
pp. 71-73 ◽  
Author(s):  
M R Bedilov ◽  
Yu A Bykovskiĭ ◽  
D Kuramatov ◽  
K Khaitbaev
Keyword(s):  
Laser Plasma ◽  
Silver Ions ◽  
Energy Spectra

scholarly journals Laser generated plasmas as a source for real time studies in X-ray crystal research: Part II: In search of an optimum choice of laser plasma coupling conditions

1984 ◽  
Vol 2 (2) ◽  
pp. 187-199 ◽  
Author(s):  
K. Schäfer ◽  
W. D. Zimmer
Keyword(s):  
Real Time ◽  
Laser Plasma ◽  
Electron Spectrum ◽  
Line Emission ◽  
Simplified Model ◽  
Hot Electron ◽  
Plasma Parameters ◽  
X Ray ◽  
Laser Plasmas ◽  
Plasma Coupling

For real-time diffraction experiments in X-ray crystal research a simplified model is chosen to describe laser-generated plasmas. This enables a rough estimate of the optimum laser plasma parameters necessary to maximize the line emission of highly ionized species. Furthermore, the use of the hot electron spectrum of laser plasmas to generate ultrashort Kα-emission is discussed.

scholarly journals Vacancy of laser field induced by phase reflection in underdense plasmas and its relation to laser-plasma parameters

2006 ◽  
Vol 55 (5) ◽  
pp. 2347
Author(s):  
Zhang Qiu-Ju ◽  
Sheng Zheng-Ming ◽  
Wang Xing-Hai ◽  
Man Bao-Yuan ◽  
Cang Yu ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Laser Field ◽  
Plasma Parameters ◽  
Underdense Plasmas ◽  
Phase Reflection

scholarly journals AN EXPERIMENTAL STUDY OF THE RELATIONSHIP BETWEEN SLABE, HALF-CYLINDER AND FOIL TARGET STRUCTURE AND ITS LASER PLASMA PARAMETERS DISTRIBUTION

1993 ◽  
Vol 42 (5) ◽  
pp. 785
Author(s):  
HAN SHEN-SHENG ◽  
XU ZHI-ZHAN ◽  
JIANG ZHI-MING ◽  
LI YUE-LIN ◽  
WANG XIAO-FANG ◽  
...  
Keyword(s):  
Experimental Study ◽  
Laser Plasma ◽  
Target Structure ◽  
Plasma Parameters ◽  
Foil Target ◽  
The Relationship

Characterization of the palladium plasma produced by nanosecond pulsed 532 nm and 1064 nm wavelength lasers

Laser Physics ◽  
2021 ◽  
Vol 32 (2) ◽  
pp. 026002
Author(s):  
M Asif ◽  
U Amin ◽  
Z U Rehman ◽  
R Ali ◽  
H Qayyum
Keyword(s):  
Kinetic Energy ◽  
Electron Temperature ◽  
Electron Density ◽  
Laser Plasma ◽  
Laser Fluence ◽  
Plasma Heating ◽  
Total Charge ◽  
Plasma Parameters ◽  
Wide Range ◽  
532 Nm

Abstract Palladium plasma produced by nanosecond pulsed 532 nm and 1064 nm wavelengths lasers is studied with the help of planer Langmuir probe. The experiment is conducted over a wide range of the laser fluence (1.6–40 J cm−2). The measured time of flight ions distributions are used to infer total charge, kinetic energy of the palladium ions and plasma parameters. Our results indicate that the ion charge produced by both laser wavelengths is an increasing function of the laser fluence. Initially, the ion charge produced by 1064 nm is lower than 532 nm, but it increases at much faster rate with the rise of laser fluence as the inverse bremsstrahlung plasma heating prevails at higher plasma densities. The most probable kinetic energy of the Pd ions produced by 1064 nm wavelength is also lower than that of 532 nm. The time varying plasma electron temperature and electron density are derived from the current–voltage plots of the two plasmas. For both wavelengths, the electron temperature and electron density rapidly climb to a maximum value and then gradually decline with time. However, in case of the 532 nm, the electron temperature and electron density remain consistently high throughout the laser plasma. The results are compared the available literature and discussed by considering surface reflectivity, ablation rate of the Pd target and laser plasma heating. The results presented in this work will provide more insight into the process of laser ablation and can be useful for the development of laser-plasma ion sources.

Control of femtosecond laser plasma parameters by surface contaminants cleaning with preceding pulse laser

2004 ◽  
Author(s):  
Ilya M. Lachko ◽  
R. V. Volkov ◽  
D. M. Golishnikov ◽  
Vyacheslav M. Gordienko ◽  
M. S. Dzhidzhoev ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Pulse Laser ◽  
Laser Plasma ◽  
Plasma Parameters ◽  
Surface Contaminants ◽  
Femtosecond Laser Plasma
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