Figure 6
The profiles were obtained from the XIBPM by adjusting the electric field and X-ray energy in mono-beam mode, either in the residual gas mode or the Kr gas mode. They were averaged over 1200 X-ray pulses for each setting and fitted using a triple Gaussian function. (a) Maximum amplitude, (b) width and (c) peak position of profiles are shown as functions of the electric field. Thin-diamond, triangle, circle and square symbols represent MCP gains of −1200, −1400, −1600 and −1800 V, respectively. |