## Meeting 2015 09 25 » History » Version 1

Nicolas Ponieman, 09/21/2015 05:13 PM

 1 2 3 1 Nicolas Ponieman `{{toc}}` 1 Nicolas Ponieman 1 Nicolas Ponieman `h1. Meeting 2015 09 25` 1 Nicolas Ponieman 1 Nicolas Ponieman `h2. Generic settings` 1 Nicolas Ponieman 1 Nicolas Ponieman `/N02/det/trackMaxSteps 1000000000` 1 Nicolas Ponieman `/N02/det/trackMaxLen 10 km` 1 Nicolas Ponieman `/gun/energy 10.9181415106 MeV` 1 Nicolas Ponieman `/N02/prec/setDeltaOne 1.0e-2 mm ` 1 Nicolas Ponieman `/N02/prec/setDeltaInt 1.0e-5 mm` 1 Nicolas Ponieman `/N02/prec/setEpsilonMin 1.0e-3` 1 Nicolas Ponieman `/N02/prec/setEpsilonMax 1.0e-3` 1 Nicolas Ponieman `/N02/det/stepMax 20. mm` 1 Nicolas Ponieman 1 Nicolas Ponieman `* All measured times correspond to executions which don't produce output at all (or produce a minimum logging). ` 1 Nicolas Ponieman `* MSE is the Mean Squared Error of the position` 1 Nicolas Ponieman `* MSE = 1/N * sum_{i=1}^{N} (G4x_i - ANx_i)^2 + (G4y_i - ANy_i)^2` 1 Nicolas Ponieman `* N = Number of output points` 1 Nicolas Ponieman `* r_Error = sqrt(MSE)` 1 Nicolas Ponieman `* max(X_Error) is the maximum of all the absolute errors in x, i.e. max(abs(G4x_i - ANx_i))` 1 Nicolas Ponieman 1 Nicolas Ponieman `h2. Experiment 4 - Vary DeltaChord in G4` 1 Nicolas Ponieman 1 Nicolas Ponieman 1 Nicolas Ponieman `|\3=. |\2=. 1 km |\2=. 100 m |\2=. 10 m |\2=. 1 m |\2=. 100 mm |\2=. 10 mm |\2=. 1 mm |\2=. |` 1 Nicolas Ponieman `|_. Delta Chord [mm] |_. Simulation Time |_. RHS evaluation steps |_. r_Error [mm] |_. Max(X_Error) [mm] |_. r_Error [mm] |_. Max(X_Error) [mm] |_. r_Error [mm] |_. Max(X_Error) [mm]|_. r_Error [mm] |_. Max(X_Error) [mm] |_. r_Error [mm] |_. Max(X_Error) [mm] |_. r_Error [mm] |_. Max(X_Error) [mm] |_. r_Error [mm] |_. Max(X_Error) [mm] |_. Output Steps |_. Output steps / RHS steps ratio |` 1 Nicolas Ponieman `| 0.01 | 3.9s | 6.60e6 | | | | | | | | | | | | | | | 50001 | 7.58e-3 |` 1 Nicolas Ponieman `| 0.05 | 2.3s | 3.30e6 | | | | | | | | | | | | | | | 50001 | 1.51e-2 |` 1 Nicolas Ponieman `| 0.25 | 1.5s | 1.65e6 | | | | | | | | | | | | | | | 50001 | 3.03e-2 |` 1 Nicolas Ponieman `| 0.5 | 1.3s | 1.10e6 | | | | | | | | | | | | | | | 50001 | 4.55e-2 |` 1 Nicolas Ponieman `| 1.0 | 1.3s | 1.10e6 | | | | | | | | | | | | | | | 50001 | 4.55e-2 |` 1 Nicolas Ponieman 1 Nicolas Ponieman 1 Nicolas Ponieman `Although all the errors look similar, there is a clear and counterintuitive tendency for the error to become smaller as stepMax is increased. ` 1 Nicolas Ponieman `A few plots for different values of stepMax:`