On the atomic particle concentration ratio in a multicomponent laser plasma plume

2008 ◽  
Vol 53 (1) ◽  
pp. 125-128
Author(s):  
M. P. Chuchman ◽  
A. K. Shuaibov
Keyword(s):  
Laser Plasma ◽  
Concentration Ratio ◽  
Particle Concentration ◽  
Plasma Plume ◽  
Atomic Particle

Influence of floc structure on membrane permeability in the coagulation-MF process

2005 ◽  
Vol 51 (6-7) ◽  
pp. 143-150 ◽  
Author(s):  
M.-H. Cho ◽  
C.-H. Lee ◽  
S. Lee
Keyword(s):  
Fractal Dimension ◽  
Membrane Permeability ◽  
Hybrid System ◽  
Concentration Ratio ◽  
Particle Concentration ◽  
Specific Resistance ◽  
Suspended Particle ◽  
Ion Concentration ◽  
Operating Parameters ◽  
Floc Structure

The relation between floc structure and membrane permeability was studied in a coagulation-MF hybrid process. The floc structure changed with operating parameters in the coagulation process and was quantified with fractal dimension (dF). The concentration ratio between suspended colloids and injected coagulant had an essential effect on dF of coagulated flocs. Larger flocs with low fractal dimension were produced for ALT (aluminum ion concentration dosed/suspended particle concentration) between 0.4 and 0.8. Flocs maintained stable characteristics at the coagulation period of over 20 minutes. Membrane permeability was improved with coagulated flocs of lower fractal dimension, which tend to have higher porosity and aggregate relatively loosely. These more porous flocs reduce specific resistance of coagulated flocs. The relation between membrane filterability and fractal dimension of flocs was explored in a submerged MF hybrid system as well as in a batch unstirred cell filtration.

scholarly journals Tracking ground state Ba+ions in an expanding laser–plasma plume using time-resolved vacuum ultraviolet photoionization imaging

2004 ◽  
Vol 22 (3) ◽  
pp. 207-213 ◽  
Author(s):  
J.S. HIRSCH ◽  
K.D. KAVANAGH ◽  
E.T. KENNEDY ◽  
J.T. COSTELLO ◽  
P. NICOLOSI ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Laser Plasma ◽  
Ground State ◽  
Column Density ◽  
Vacuum Ultraviolet ◽  
Plasma Plume ◽  
Experimental System ◽  
Time Resolved ◽  
Density Maps ◽  
Ccd Array

We report results from a study of the integrated column density and expansion dynamics of ground-state-selected Ba+ions in a laser–plasma plume using a new experimental system—VPIF (vacuum-ultraviolet photoabsorption imaging facility). The ions are tracked by recording the attenuation of a pulsed and collimated vacuum ultraviolet beam, tuned to the 5p–6dinner-shell resonance of singly ionized barium, as the expanding plasma plume moves across it. The attenuated beam is allowed to fall on a CCD array where the spatial distribution of the absorption is recorded. Time-resolved ion velocity and integrated column density maps are readily extracted from the photoionization images.

scholarly journals Vacuum-ultraviolet photoabsorption imaging system for laser plasma plume diagnostics

2003 ◽  
Vol 74 (6) ◽  
pp. 2992-2998 ◽  
Author(s):  
J. S. Hirsch ◽  
E. T. Kennedy ◽  
A. Neogi ◽  
J. T. Costello ◽  
P. Nicolosi ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Vacuum Ultraviolet ◽  
Plasma Plume ◽  
Imaging System

Femtosecond laser plasma plume characteristics in the nanojoule ablation regime

2013 ◽  
Vol 113 (18) ◽  
pp. 183101 ◽  
Author(s):  
S. P. Banerjee ◽  
Zhijiang Chen ◽  
R. Fedosejevs
Keyword(s):  
Femtosecond Laser ◽  
Laser Plasma ◽  
Plasma Plume ◽  
Ablation Regime ◽  
Femtosecond Laser Plasma

Collisionless Shocks in a Large Magnetized Laser-Plasma Plume

2011 ◽  
Vol 39 (11) ◽  
pp. 2406-2407 ◽  
Author(s):  
Christoph Niemann ◽  
Anton S. Bondarenko ◽  
Carmen G. Constantin ◽  
Erik T. Everson ◽  
Kirk A. Flippo ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Plasma Plume ◽  
Collisionless Shocks

Measurement of transient electric charge signals induced by a laser plasma plume

1997 ◽  
Author(s):  
Seisuke Kano ◽  
Yuji Enomoto ◽  
Nobuhiro Aya ◽  
Naoki Ichikawa ◽  
Hirofumi Shimura ◽  
...  
Keyword(s):  
Electric Charge ◽  
Laser Plasma ◽  
Plasma Plume
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