Theoretical investigation of scanning electron-acoustic imaging

A 1-D theoretical analysis of the electron-acoustic signal excited in a solid sample by a modulated electron beam is given. An explicit expression for the temperature distribution is found using the thermal wave equation. Then, a theoretical analysis of the thermo-acoustic signals in the sample is carried out by solving the displacement field equation. Numerical calculation of the electron-acoustic signals on the modulation frequency, the thermal conductivity and elastic properties of the sample are given.