System and method for continuous flow production of nanometric or sub-micrometric powders by the action of laser pyrolysis

A system for continuous flow production of nanometric or sub-micrometric powders under the action of laser pyrolysis comprising:

• a laser operative to emit a laser beam along an axis OX;
• an optical device configured to receive said laser beam and to output an elongated laser beam having energy distributed along a first axis perpendicular to the axis OX in an elongated cross-section with adjustable dimensions, wherein at least one of the width or height of the elongated cross-section is independently changeable;
• and
• at least two first injectors respectively configured to emit, perpendicularly to a plane in which the axis OX and the first axis lie, at least two flows of reagents in a first interaction area between the elongated beam and these at least two flows of reagents, so that the flows of reagents exiting from the at least two first injectors are all covered by the elongated cross-section of the elongated beam,
• at least two second injectors respectively configured to emit, perpendicularly to a plane in which the axis OX and the first axis lie, at least two flows of reagents in at least a second interaction area between the elongated beam and these at least two flows of reagents, so that the flows of reagents exiting from the at least two second injectors are all covered by the elongated cross-section of the elongated beam,
• wherein there is an absorption of the energy of the laser in said first and second interaction areas until the energy of the laser beam may be entirely absorbed.