Simultaneous measurement of time-resolved 2-D temperature distribution of evaporation surface heated by swept electron beam [in AVLIS]

The temporal variation and spatial distribution of metallic gadolinium surface temperature during electron beam evaporation have been measured simultaneously by a high-speed video camera with a bandpass filter. The temperature was determined from the radiation intensity recorded by the bandpass, high-speed video camera coupled with a bandpass filter, after calibration with a two-color thermometer. Analytical results indicate that temporal variation of the surface temperature will cause a significant fluctuation of the atomic beam.