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![[Figure 1]](fv5073fig1mag.jpg)
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Figure 1
A typical image acquired by the arrival-timing monitor and extraction of the arrival timing. (a) Raw image around the focal area of an optical laser pulse. The two white dashed lines indicate the region of interest (ROI) specified for this image. (b) The green line is the one-dimensional intensity profile of the projection of the image in the ROI of (a), whereas the gray line indicates that of the baseline image obtained with only laser pulses. (c) Derivative profile (blue line) of the smoothed profile (light blue line) of the transmittance profile (green line) obtained by dividing the green line by the gray line in (b). The black line indicates the arrival timing determined as a peak position of the derivative profile. The horizontal width of this image corresponds to a range of approximately 5 ps of the arrival timing. The figure also shows time windows for quality checks. Dashed lines on the left and right side are xlast and xfirst, respectively. The blue shaded region indicates the region around the arrival timing, whereas the gray shaded region indicates the region of the baseline. (d) The red line is a fitted line to the transmittance profile (green line). The red shaded region indicates the region around the arrival timing (black line). |
![[Figure 1]](fv5073fig1.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
