Experiments and Theoretical Calculation of Double Pulse Laser Driven Flyer

Flyer velocity is an important index to measure the initiating ability of laser driven flyer. To improve the velocity of flyer at limited laser energy density is one of the major key issues in the pulse laser research. In this paper, a double-pulse laser driven flyer experiment was carried out by splitting one laser beam into two beams and then focusing onto the same target region The shape and position of the flyer at different times were recorded by schlieren high speed photography technique, and the flyer velocities were obtained. The theoretical formula for the calculation of the velocity of double-pulse laser driven flyer is derived, and flyer velocities are calculated at different laser energy and delay time. It is found that with the same laser energy, the application of double-pulse laser can increase the laser energy absorptivity and the velocity of the flyer.