... required^A1

particularly, a new calibration has to be done after the substitution of the complete target castle, if the vertical alignment values are changed

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... position^A2

The reference position must be detected once when installing the target and once when checking the alignments of the reference points with the metric rulers on the top of the scattering chamber. Here we use the reference position, the waterfall target position and at zero degrees angle. Changing the target block, a new reference point must be detected.

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... (up/down)^A3

One single encoder step error means an offset error of about 0.04 degrees, or 0.006 mm.

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... pump.^A4

The scale is in %.

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