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User name mcnulty
Log entry time 13:58:42 on September26,2009
Entry number 291774
keyword=spot++ after changing quad by -10%spot++ after changing quad by -10% . Raster size is 6 by 6 mm2. Run 24888. Larm s0 is on. BPM positions are:
Ax:-0.2,
Bx:-1.1,
Ay:1.9,
By:2.4.
We are within 0.2 mm of target center in both x and y (based on previous experience). We don't need the holey Carbon to know this right now, we are just going on BPM values.
Rupesh indicates that the dithering plots did not change much...Jay will make another change...I just learned that the -20% change was also not giving us good dithering plots for both x and y...See Rupesh's plots for more details. We are backing out of this study and resuming normal production.
Note that s0 rates are 125kHz at 20uA. I have turned off s0 HV in between our raster scans.
FIGURE 1
FIGURE 2
