Actually i am working on LIBS..And want to study Plasma parameters..
some parameters have been studed as,electron and ion desities,current density,and electron temperature
@Sahib Abdulwahid: As far as I know, you cannot determine the current density with LIBS.
I'm not sure to understand the question well. Having co-developed a LIBS-system in the past for detecting certain constituents in a given material, I have some practical experience. As far as I can say, a well designed LIBS gives good detection of presence of searched consituents due to their unique emitted pattern wave lengths. LIBS is more a qualitative measurement, I cannot imagine it would work well in measuring the exact amount (ex: wt%) of a constituent in the sample. For this, the emitted plasma has usually too much distortion, noise to allow that. It might be used for single pulse plasma comparisons with different pulse caracteristics (power, pulse length etc.) by measuring and comparing different plasma intensities for the same wavelengths pattern.
LIBS is a spectroscopic technique capable of doing many tasks. As already stated in the previous answers, it can measure plasma temperature and electron density. They can give a good characterization figures of the plasma. This plasma (LIBS) can be used to perform the direct chemical characterization of solid samples without prior sample preparation. LIBS can also be used for nano-material preparation under liquid to be an environmentally friend preparation procedure. LIBS has many other applications in science and technology.
Dear,
Electron and density electron, transition probabilities and density of particles.
We can also used the LIBS to highlight the interaction types between particles, and also to quantify the reabsorption and inhomogenies of a medium.
CF-LIBS allows quantitative determination of sample composition without requiring calibration curves. Nevertheless, How do you deal with air elements (i.e. O, H, N) in CF-LIBS approach? For example: How much Oxygen corresponds to the atmosphere and how much to the sample?
Dear Dr. Diego Díaz Pace ,
Using CF-LIBS technique we get only the relative composition of the constituents in the sample. We can also consider the contribution of the air elements in the plasma such as oxygen, nitrogen etc.
Dear Nasar Ahmed,
I agree. But, How can you discriminate between the mixed contributions of both, sample and air constituents which are measured from the spectrum?
Solid constituents: High atom density => stronger signal per distinct wave length
Air constituent: Lower atom density => weaker signal per distinct wave length
Dear Diego
from the laser produce plasma can be measured x-ray emission from the hot plasma by spesifc camera.
You can discriminate between the mixed contributions of both, sample and air constituents by performing your experiment in air as well as in vacuum
Dear Diego Diaz Pace,
You can discriminate between the mixed contributions of both, sample and air constituents by performing your experiment in air as well as in vacuum
Dear Diego Diaz Pace,
You can discriminate between the mixed contributions of both, sample and air constituents
- Badges
- Science topic
- Similar topics
- Correction