Experimental research on laser impulse coupling coefficient for metal coating target based on piezoelectric sensor

Ablative laser propulsion, the propellants and measuring parameters: A brief review

“…38 Figure 6 displays the impulse coupling coefficient as a function of energy density. 36 It is discovered that the impulse coupling coefficient rises quickly in the energy density range of 0.75-2.0 m J cm −2 . Upon exceeding 2.0 m J cm −2 , the laser impulse coupling coefficient exhibits a gradual increase.…”

“…Metals, polymers, plastics, ferrites, and nanoparticles are the best propellants considered due to their significance and properties. 28,[35][36][37][38] Metals have an excess number of free electrons, which provides high temperature plasma and hence, large ablation velocities are achieved. ALP technique involves heating of gas with a single wavelength of radiation and transforming the heated propellant into a significant thrust.…”

“…With a maximum radiation energy of 12.7 mJ, the coupling coefficient obtained was 47.1 × 10 −5 kg m/J and thrust generated with the aluminum foil with a thickness of 12.5 μm showed maximum thrust generation of 15 μN with a laser power of 20 W or 0.75 μN/W by Zhang et al, Guo et al, and Horisawa et al, respectively. [36][37][38][39] Cohen et al used two pulsed techniques to find the specific impulse in the range of 2000-4000 s by using materials such as carbon, aluminum, iron, silicon, copper, zinc, and gold. The specific impulse was achieved with an efficiency of 20%.…”

“…72 A different method (piezoelectric sensors) was used to measure the parameters of propulsion and for the calibration of the sensors. 36 The relationship between the laser's energy density and the impulse coupling coefficient can be deduced from the linear relationship between the impact momentum and the sensor's signal voltage. Experimental results found the impulse coupling coefficient as a function of energy density.…”