Compton Polarimetry

This seems to be incomplete, the LeanComptonMatrices or LeanAnalysisComptonMatrices never were part of GRSISort!

Process

Here are the steps to follow for Compton Polarimetry analysis in GRSISort.

1): Use GRSISort to produce an analysis tree for each subrun that have calibrated energies.

2): Make the histograms for Compton Polarimetry using the LeanComptonMatrices script. There will be one file for each subrun. Example command:

for i in {001..012}; do LeanComptonMatrices analysis02340_${i}.root; done

3): Combine all subrun histrogram files into a single file using hadd.

hadd CompHists_02340_001-012.root CompHists_02340_001.root CompHists_02340_002.root CompHists_02340_003.root CompHists_02340_004.root CompHists_02340_005.root CompHists_02340_006.root CompHists_02340_007.root CompHists_02340_007.root CompHists_02340_008.root CompHists_02340_009.root CompHists_02340_010.root CompHists_02340_011.root CompHists_02340_012.root

4): Make the final Compton Polarimetry Analysis plots using the LeanAnalysisComptonMatrices script.

LeanAnalyzeComptonMatrices CompHists_02340_001-012.root

5): The main results will be printed to the terminal and found in the plots AsymmetryBinFoldNonCo, CHISquared_BinFoldNC in the final file CompPlots_02340.root.

Scripts

The two scripts, LeanComptonMatrices and LeanAnalyzeComptonMatrices, are located in the ~/packages/GRSISort/scripts folder. To compile changes to these scripts execute the make command in the ~/packages/GRSISort folder.

LeanComptonMatrices

The purpose of this script is to produce the coincidence histograms which are used for the Compton Polarimetry analysis. The parameters to change for each case:

-output filename and path (yes they are hardcoded), ~line 112 and 127.

-The energies of the cascade gamma rays, ~line 186. double gEnergy[2] = { 1173.2 , 1332.5 }; // For scatter of 1173keV, 60Co

-Any energies to be excluded (this crude method should be improved), ~line 380. if(grif->GetGriffinHit(two)->GetEnergy() > 505 && grif->GetGriffinHit(two)->GetEnergy() < 517 ) continue; // 511 keV from single-escape

Recompile the script after making any changes to parameters or code.

LeanAnalyzeComptonMatrices

The purpose of this script is to perform the Compton Polarimetry analysis on the histograms. The parameters to change for each case:

-The run number being sorted (used for CompPlots filename), ~line 74. #define RUNNUMBER 2340

-The quality factor for this setup, #define AGATA_Q_Folded 0.2399 and #define E_Q_Measure 1332, as well as the energy of the gamma ray that is scattering #define E_Q_Use 2013. ~lines 89-91.

-The parameters defined in the double PolarizationCalculation() function which are specific to the cascade under study, ~line 682-691. The origin of the F_JiJx and F_JfJx coefficients are the tabulations of RS. Hager and EC Seltzer, Nuclear Data Sheets 4, 397 (1968).

Recompile the script after making any changes to parameters or code.