||Gas bubbles are observed in our daily life, which are generated through self-organization or external drives. One of the techniques generating bubble in liquid is through the vaporization of liquid by the intense laser pulse. It provides many applications in laser surgery and molecular and cellular biophysics.|
On the other hand, the dusty plasma system is a weakly ionized plasma containing many micron-size dust particles. Through Coulomb interaction
and charging process, the massive dust grains are strongly coupled with the background plasma. It provides a platform to investigate the Mach
cone structure, the solid-liquid transition, viscoelastic property microscopically in the strongly coupled Coulomb liquid system. As the gas bubble generated in the liquid through the laser-liquid interaction, the plasma bubble can be generated in the dusty plasma liquid by the
intense laser pulse. It is found that the plasma bubble, a localized structure, sustains its shape and travels downward in the dusty plasma liquid. Hence, It brings out several interesting issues at different time scales. In this thesis,
the expansion of the spherical plume is compared with the shock wave model at nsec to ¹sec. The dust particles are pushed by the outward ion
flow associated with the plume and the plasma bubble is formed at usec to msec. After msec, the plasma bubble travels downward associated with a surrounding dipole-like dust flow field at suitable background condition. It is also found that there is a strong interaction between two vertically aligned plasma bubbles. The formation of the wave induced bubble suggests that the spherical void is an extreme case of the dust density wave with large amplitude. In the last part of this thesis, the observation of the dust cluster changing the sheath potential well is shortly discussed.
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