This invention is a novel “particle gas” cell for achieving plasma densities higher than accessible in conventional gas jets. The particle gas cell has a silicon nitride window and is partially filled with melamine spheres in the sub-micron to micron diameter range. The cell is acoustically vibrated, which causes the spheres to levitate and completely fill the cell. The spheres are then ionized by a high intensity laser that vaporizes the window and creates a plasma of the desired density.
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