This afternoon, we found out that Sergey has also implemented a "target bump".
Although we do not use a target, this bump is still convenient because
we can move the ion beam such that is passes perfectly through the Cu mirror.
The setting is -8 mm and 1.3 mrad (if I am not mistaken)
We tested the effect on the position of the ion beam using the
horizontal scrapers at the target: GEEXDS1HA and GEEXDS2HA.
With the target bump set to "zero" (0 mm and 0 mrad),
the ion beam passed 6-8 mm to the outside.
This way, it will e.g. not pass centrally through the slit in the Cu mirror.
With the target bump set to -8 mm and 1.3 mrad, which is the default setting, the ion beam passed centrally.
Therefore, we left the target bump like this. |