|
|
|
Figure 1
Schematic configuration of the differential pumping scheme adopted. Three stages (1 to 3) are separated by small (<1 mm) apertures (indicated as A1–A4). P0 indicates the pressure at the sample (that can be equal to the ambient pressure). P4 is the required vacuum level of the beamline (typically 10−8 mbar). PPx indicates the pumping ports. |
Open
access
access
journal menu![[Figure 1]](vl5047fig1.jpg)



