Excitation of the dust ion-acoustic and dust acoustic-like perturbations by plasma density ripples

P.K. Shukla

Research output: Contribution to journalArticlepeer-review


It is shown that the dust ion-acoustic (DIA) and dust acoustic (DA)-like perturbations can be excited by the electron density and ion density ripples, respectively. For this purpose, we use the relevant equations for the DIA and DA-like disturbances and derive the standard Mathieu equation. The latter admits unstable solutions, demonstrating that both the DIA and DA-like mode can be driven on account of the free energy in the plasma density ripples.
Original languageEnglish
Pages (from-to)1768-1770
Number of pages2
JournalPhysics Letters A
Issue number20
Publication statusPublished - 27 Apr 2009


  • waves
  • dust ion-acoustic
  • dust acoustic-like
  • plasma
  • density ripples

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