Beginning Analysis

I KNOW THIS PROBABLY DOESNT BELONG HERE BECAUSE THIS IS ANALYSIS RELATED, AND NOT REALLY ASSOCIATED WITH THE SOFTWARE, BUT I WANT TO REMEMBER SO HERE IT IS

These are sort of running notes that I (JAB) am making on stuff that needs to be done before you can get to "physics" analysis.

1. Gate on incoming beam using OBJ vs XFP timing.
2. CRDC Stuff:
   • Look at pad amplitudes (I dont know how yet, data vs sample??) and should be a flat line.
   • Perform mask calibration.This is outlined here.
   • Make y drift correction. To do this plot Non Dispersive Y value (1d histogram). This value should be centered on 0. NOTE - You want to correct it when you are gating on your residue of interest. You want to make sure that the y is aligned for ALL runs. You can set this value in your GValue using the "name" CRDC1_GLOB_Y_OFF
   • Shift ATA and BTA values so they are centered on zero. Use the GValues "named" ATA_SHIFT etc.
3. Gating:
   • To do PID you want to look at three plots. The Y axis is the OBJ TOF for all three (using the Mesytec TDC, the phillips TDC, or the TAC, the choice is yours) and the X axis is the Dispersive X from CRDC1, the AFP value from the S800, and the Ion Chamber charge. The plot with the IC Charge is where you perform your PID gates, the other two plots are used to ensure you have the correct correction values in your OBJ TOF calculation.
   • You want to gate on prompt events. This means you look at GRETINTA Time - Bank29Time-T0 (Note: T0 lives in your gretina hit. It is a walk correction) versus Gretina Energy.
4. Checking your data:
   • You want to look at your GATED GRETINA doppler corrected energy (with your inverse map correction) as a function of:
     • Theta
     • Phi
     • Beta (If you want. This will help you check if your beta value is in fact correct)