摘要: Thermal coupling of CO2 laser energy to metal surfaces of aluminum, titanium, stainless steel and copper has been measured under large-spot, repetitively pulsed conditions using the AVCO Humdinger, Sr., laser. Measurements were ma... 展开 Thermal coupling of CO2 laser energy to metal surfaces of aluminum, titanium, stainless steel and copper has been measured under large-spot, repetitively pulsed conditions using the AVCO Humdinger, Sr., laser. Measurements were made at atmospheric pressure with a Mach 0.4 air flow transverse to the target surface and in a low-pressure environment of approx. 3 torr. The multipulse coupling measured with Humdinger, Sr., is consistently less than previous measurements of single-pulse and small-spot multipulse coupling measured at other laser facilities. Time-resolved measurements of the energy deposition indicate that the differences in the various sets of coupling data may be due to pulse shape effects. (Author) 收起