Patents by Inventor Nadezhda KOVYZHENKO

Nadezhda KOVYZHENKO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190137403
    Abstract: The disclosed method and handheld analyzer of elemental concentration measurement is based on spectral analysis of high temperature highly ionized plasma generated by laser-generated pulses. Due to a high pulse energy and short pulse duration, high intensity singly and multiply charged ion lines in addition to neutral atomic lines are excited. The pulsed laser source of the disclosed analyzer is configured to output a train of pulses of signal light at a 1.5-1.6 signal wavelength at a pulse repetition rate from 0.1 to 50 kHz, pulses duration from 0.01 to 1.5 ns, pulse energy between 100 and 1000 uJ and has a beam spot on the surface of the sample varying 1 to 60 ?m. The above-described parameters provide at least a 20 GW/cm2 laser power density sufficient to induce a high temperature, highly ionized plasma (plasma) which allows measuring the carbon concentration in carbon steels by employing doubly charged ionic line CII with a detection limit down to 0.
    Type: Application
    Filed: April 11, 2017
    Publication date: May 9, 2019
    Inventors: Valentin GAPONTSEV, Ivan KURATEV, Roman BIRYUKOV, Ekaterina FEDYNA, Sergey PASHKO, Oleg MELOVATSKY, Andrey REZNIKOV, Nadezhda KOVYZHENKO, Dmitri OULIANOV