Abstract : Highly energetic (approx. = 42 eV) and dense (approx. = 4 times 10 to the 17th power/cu. cm.) plasma beams with directed velocities (approx. = 20 cm/micrometers) obtained by an improved version of a Cheng type coaxial gun have been directed towards a perforated metallic plate to study the beam-hole interaction. Various diagnostic techniques such as optical interferometry, high speed photography, optical spectroscopy, voltage and current measurements have been performed to characterize the incident plasma beam and determine its different parameters in various conditions with and without the perforated plate. A single fluid model using the method of characteristics has been chosen to study the features of the escaping flow. The pressure of the perforated plate reduced the velocities as well as the temperature significantly thus modifying the properties and structure of the diverging jet. Observers provided evidence that a large amount of material has been ablated from the hole region and transported with the escaping jet. (Author)