Figure 4
Oscilloscope image of photodiode responses of the X-ray and the laser pulse upon temporal overlap. The upper curve is the X-ray signal (red) and the lower curve the laser signal (green). The cursor line is used as the alignment of two signals at the middle of the rising edges. The display division is 500 ps. The inset shows a spatial overlap image of the X-ray spot (white spot) and the laser spot (green). |