Influence of acoustic waves on Radiation Spectra of Argon Gasdischarge Plasma.pdf

Influence of acoustic waves on Radiation Spectra of Argon Gas-discharge Plasma Aramyan A.R. Institute of Applied Problems of Physics, NAS RA 25, Hr. Nersessian Street, Yerevan, 375014, Republic of Armenia E-mail: ara@iapp.sci.am It is shown that under the definite regime of interaction of the acoustic waves with low-temperature, partially ionized plasma it is possible to change the intensity of some spectral lines of atomic argon. It is shown also, that the dependence of the intensities of these spectral lines on the intensity of the acoustic wave has a hysteresis behavior. PACS number 52.25.Rv The research on properties of low-temperature ionized plasma and on the influences on it is always urgent, since besides the elucidation of new physical mechanisms, the results of these investigations quickly find practical application. It is noteworthy, however, that the influence of acoustic waves on plasma parameters and on processes in the plasma environment are studied relatively poor. Besides, high interest arose lately to the problem of interactions of acoustic waves with such thermodynamically nonequilibrium gas as is the partially ionized plasma of gas discharge, where the electron temperature usually much exceeds that of heavier particles [1ñ 6]. Note that of numerous problems connected with the interactions of acoustic waves with partially ionized plasma, the special promising is the influence of acoustic waves on radiation spectra of gas-discharge plasma. Last years, an interesting effect consisting in sharp change of radiation spectrum under action of sonic wave in dense (p ~ 100 Torr) gas discharge p