|
| |
FIZIKA A 10 (2001) 1 , 31-46
 
ON THE PROBLEM OF SELF-FOCUSSING AND TRANSVERSAL
STABILITY IN A MAGNETISED PLASMA WITH STREAMING IONS
K. Kr. MONDALa, A. ROYCHOWDHURYb and S. N. PAULc
a Department of Physics, Raja Peary Mohan College, Pin-712
258, Hooghly, West Bengal, India
b Department of Physics, Jadavpur University, Calcutta-700 032, West Bengal,
India
c Serampore Girls' College, Pin-712 201, Hooghly, West Bengal, India
Received 7 July 2000; revised manuscript received 15 March 2001
Accepted 19 March 2001
Self-focusing in a magnetized plasma consisting of cold electrons and ions has been
studied in a situation when ions have a streaming velocity and the external magnetic field
is at an angle µ with the streaming direction. By the use of a modified scaling, we have
deduced an analogue of a non-linear Schrodinger equation involving only the space
variables, which actually controls the transversal stability of the system, thus signaling
the possibility of self-focusing. The various situations arising due to the variation of
the propagation angle µ and the streaming velocity u0 are discussed in detail for the
specific cases of D2 and N2 ions.
PACS numbers: 25.40.LW, 27.70.+q
UDC 539.172.4
Keywords: magnetised plasma, cold electrons and ions, streaming velocity and external
magnetic field at an angle, non-linear Schrodinger equation, self-focusing, D2
and N2 ions
|
