  An experimental investigation of laser produced colliding plasma of aluminium
target in the presence of external magnetic field in vacuum is done.
Characteristic parameters and line emission of plasma plume in the presence of
magnetic field are compared with those for field free case. Axial expansion of
the plasma is slowed down in the presence of magnetic field as compared to the
field free case. Contrary to the field free case no sharp interaction zone is
observed. Higher electron temperature and increased ionic line emission from
singly as well as doubly ionized aluminium can be attributed to the Joule
heating phenomenon.
