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FIZIKA A 14 (2005) 4, 265 - 276
 
CONVERSION OF ELECTROMAGNETIC WAVE INTO ELECTRON-ACOUSTIC WAVE IN AN
INHOMOGENEOUS PLASMA
S. N. PAULa,b, G. PAKIRAc and B. PAULb
aInter University Centre for Astronomy and Astrophysics, Post
Bag-4, Ganeshkhind, Pune-411007, India
bCentre for Science Education and Research, B/4, Shyamali Housing Estate,
Salt Lake City, Calcutta-700064, India
E-mail:sailenpaul@rediffmail.com
cDepartment of Physics, Sripat Sing College, P.O.-Jiaganj, Dist.-Murshidabad,
West Bengal, India
Received 6 October 2003; revised manuscript received 14 July 2005
Accepted 12 September 2005 Online 13 February 2006
The transverse electromagnetic waves and the longitudinal electron-acoustic waves are
coupled to each other by the gradients of density or temperature in a plasma. There are
also other coupling factors, such as the static magnetic field or nonlinearities existing
in the medium. Due to coupling of waves, excitation of one leads to the generation of the
other. This results in mutual transfer of power. In the present paper, the expression for
the energy flux of acoustic wave due to conversion of electromagnetic wave passing through
an inhomogeneous plasma has been obtained using the W. K. B. method. It is suggested that
expansion of ionized shell of hot stars and mass loss would be possibly due to the energy
conversion process.
PACS numbers: 52.35.-g, 52.40.Db
UDC 537.531
Keywords: electromagnetic wave, electron acoustic wave, inhomogeneous plasma
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