BigRIPSPPAC Config - SpiRIT-Collaboration/BeamAnalysis GitHub Wiki

The configuration file BigRIPSPPAC has information for up to 18 PPACs. Of these, we only had 12 in the analysis: F3PPAC-1A,F3PPAC-1B,F3PPAC-2A,F3PPAC-2B,F5PPAC-1A,F5PPAC-1B,F5PPAC-2A,F5PPAC-2B,F7PPAC-1A,F7PPAC-1B,F7PPAC-2A,F7PPAC-2B. The names are in column A. The corresponding focal plane from 1-7 is in column B. Columns C-Q were left as found in the prior version of the configuration file. Column R contains the TDC overflow. This is set to 40,000. This restricts PPAC information to contain only signals from the triggered beam pulse, and no concurrent pulses. If no data is reconstructed, this is one place where the constraint might need to be relaxed. To exclude a PPAC from the analysis, we enter limiting values in the tsum columns (columns S-V). It is important that the range makes physical sense (max > min) for anaroot to exclude a ppac from analysis. Therefore, to exclude a ppac, we used -2 for the tx and tysum min, and -1 for the tx and tymax. While determining the proper Tsum times, it is best to leave this range wide open (0,1000). I did no changes to columns W-AZ.

The reconstruction routine attempts to use the Tsum limits to reconstruct missing PPAC information. Thus it is crucial to have proper limits chosen. This is done using a patch to TArtCalibPPAC.cc, which may not be installed in your environment. I write this documentation assuming that the patch has been applied.