The present paper is an attempt to study rectangular laser light effects on optoacoustic waves of first and second sounds in superfluid Helium theoretically considering electrostrictive mechanism. There are two mechanisms in Helium superfluid: thermal and electrostrictive. Since the paper studied crystal parts of Helium and coefficient of absorption in these parts is zero, the only dominant mechanism is electrostriction mechanism. To carry out the research the researcher emitted Laser light into crystal parts of superfluid Helium and observed and analyzed its results on first sound waves (pressure vibration) and second sound waves (temperature vibration).

Full text: IJEIR_1550_Final.pdf