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The change in asymmetry calibration (for the same August-September 2008 period) after these improvements illustrated on the following plots for large and small diodes:
For some crystals the improvements was significant, while in average the effect is modest (about 0.5 mm).
Using this improved version of calibration code I've generated asymmetry calibration files for 6 periods of 6 Ms each, covering first year of FERMI operation.
The following plot shows the difference asymmetry calibration for each time period with respect to the first one (August-September 2008).