Meeting No. 4
Results:
1.) 
2.) 
3.) 
Optics:
I have made a progress with optics. It took me much longer then expected
becuase I was serching for a reason, why at low energy (195MeV) the calibration
breaks. It was a wrong Emiss cut in the Gridfinder.col file. I corrected also
few minor mistakes and now I have "full" matrices for spectrometer A
for all three beam energies (195MeV, 360MeV and 495MeV). I also finished B
at 195MeV. I am left with determining the matrices at 360MeV and 495MeV.
Before being able to report the final result, I need to remove the unnecessary
matrix elements. Doing the full search takes a lot of time. I developed
a fast algorithm, which goes over the elements only once (like dmaini), but
breaks at the last step. I need to figure it out why.
Solid-ISR
The problem with the Lupolen target is the Carbon background. The rate of
Carbon events is much larger than the rate from the H. The ratio
is 80/20 for carbon. To change the ratio, one needs to go closer to
the minimum of the Carbon FF. The only way to achieve this is to perform
the measurement at 495MeV and 30deg. With this setting we are almost
at the minimum, this changing the ration of the C/H to 1/1. However,
with this setting we can come only to 10E-3. Additionally, we have a
problem there with the pion-background. Here are the protposed
kinematic settings. The corresponding results of the simulation
will follow.
RunPlanISR_SOLID.pdf
Last modified 12/02/2016
