Patent ID: 6931049
Filing Date: 2005-08-16
Classification: G21B,Y02E

Abstract:
1. A method of generating a high-temperature high-density plasma by heating a target material by focussing and irradiating a pulsed laser beam to the target material as a main laser beam, said method comprising a plasma production procedure and a target material preheating procedure and a debris transpiration procedure, wherein: said plasma production procedure comprises of the step of making the target material gasified in a focus spot near the surface of the target material into the plasma by using the main laser; said target material preheating procedure comprises of the steps of heating the surface of the target material prior to said plasma production procedure by irradiating a light beam for preheating, vaporizing the target material and spouting it as a high-density spouting gas flow in a direction perpendicular to the surface of the target; and said debris transpiration procedure comprises of the step of transpiring, using a light beam for the transpiration, the debris of the target material which are ejected from the vicinity of the focus spot after the plasma has diffused.