User name A. Camsonne
Log entry time 08:04:40 on March 4,2007
Entry number 194697
Followups:
keyword=Fist raster correctionsI changed the urb in rb in the elastic replay to try to get the raster correction. Did the a quick raster correction. I first got a calibration of the beam position with the raster current.
The constant I have for a 6x4 raster center in 6x2 give the formula :
T->Draw("(rb.Raster.rawcur.y-2150)/900*3+2:6+2*(rb.Raster.rawcur.x-2250)/1150")
Using Guido's formula :
T->Draw("(R.gold.dp+1.+ ((rb.Raster.rawcur.y-2150)/900*3+2)/5180+ 0.0041*R.gold.ph*1.+1.*0.1*R.gold.ph**2+0.*4.912*R.gold.dp**2)*1340*(1.+2.*1343/11177.928*sin(acos(cos(R.gold.th)*cos(-R.gold.ph+0.218166156))*0.5))/(1.+2.*1343/11177.928*sin(0.218166156*0.5)*sin(0.218166156)*0.5)>>Rp1c(2000,1200,1400.)");
Just added correction in vertical motion of beam. We see an improvment but it still needs to be tweaked ( I let Guido's magic do the work while I sleep... ) to get to the goal for lead, right now sigma is 560 KeV roughly.
FIGURE 1
FIGURE 2
