Calibration summary from 17/12/09 shift

R. Apsimon

P1 y calibration

P2 y calibration

P3 y calibration

Not yet sure why the calibration constant for P3 is different, will check the transfer matrix with Javier, might be due to asymmetry caused by broken x-strip, but that’s probably just a total guess!

P2x variation as ZV6X is varied

Sum_x to sum_y correlation in P2 for ycal

Sum_y

Sum_x

P1y variation as ZH4X is varied

P2y variation as ZH4X is varied

P3y variation as ZH4X is varied

The variation here is 20 times larger than in P1 and 5 times larger than in P2, cannot believe this is due to rotation error in P3, maybe dead strip?

P2x x calibration

Previous week’s calibration constant here was about 0.01, half of what is expected, now it is half that again, suspect I need to check transfer matrix with Javier, but as this was the damaged processor, I will also check the output in case this is (partly) a hardware issue.

Sum_x to sum_y correlation in P2 for xcal

Sum_x

Sum_y

Some quick notes

• Sum counts are consistently lower in x than y in P2. As is calibration constant, need to look into this.

• Tried to look at feedback gain, but didn’t get sensible results, will start simple (eg. T-shirt plots) and go from there, will show results in new year.