Log entry time 12:00:29 on October 30, 2005

Entry number 158493

Slug 15, IHWP OUT, 607365 Good 2-arm pair equivalent.

Covers roughly 10/29 08:00 - 10/30 03:00.

There is an apparent failure in the dither correction for the detector asymmetries. The problem is that the dither-corrected asymmetries are ofter a bit wider than the un-corrected, and the answer disagrees with the regression correction somewhat more than usual.

I haven't investigated in detail, but the average slopes look reasonable compared to past slugs. I suspect that the problem is the data at the end of the slug in which beam position was far from nominal, and very unstable. If the dither sensitivity changes significantly with the position offset, this data at the end of the slug might add significant noise since we use slug-averaged slopes for correction.

This problem should be investigated in greater detail.

Slug 15 Text Summary

Slug 15 Summary Plots

Slug 15 Dither Slope Summary Plots

Dither Slope History Through Slug 15