Meeting 2015 10 30 » History » Version 1

Nicolas Ponieman, 10/23/2015 02:33 PM

 1 2 3 1 Nicolas Ponieman {{toc}} 1 Nicolas Ponieman 1 Nicolas Ponieman h1. Meeting 2015 10 30 1 Nicolas Ponieman 1 Nicolas Ponieman h2. Objectives Proposed during last meeting 1 Nicolas Ponieman 1 Nicolas Ponieman # Check the values and precision of the parameters involved in Geant4, QSS and analytical solution are exactly the same. 1 Nicolas Ponieman # Plot the difference between the simulated velocity and the expected value (which is a parameter in the model). 1 Nicolas Ponieman # For each simulation with a certain number of planes, calculate the error of the simulation. 1 Nicolas Ponieman # Improve last meeting plots which compare Geant4, QSS3 and DOPRI5 performance. 1 Nicolas Ponieman 1 Nicolas Ponieman * Format issues (scales, line colors, etc.) 1 Nicolas Ponieman * Make statistic on many (10?) simulations for the points and add {simulationTime, simulationTimeError} for each number of planes. 1 Nicolas Ponieman * How does DOPRI5 find the intersection with the planes? 1 Nicolas Ponieman # New Experiment: varying stepMax (from 0.1mm to 100mm) calculate the error in the first steps (in the position and in the velocity, also the error which is compared to epsilon in Geant4) 1 Nicolas Ponieman # Repeat Experiment 1: debug what is the error in Geant4 stepper, which is to be compared with epsilon. 1 Nicolas Ponieman # New Experiment: study impact of deltaInt parameter in Geant4 when changing the number of planes. 1 Nicolas Ponieman # Make some experiments with a different magnetic field: 1 Nicolas Ponieman B(x,y) = (B/R) sqrt( x*x + (y+R)*(y+R)) zhat (where B= constant, zhat is the directional vector along the z axis, R is the radius of the circle) 1 Nicolas Ponieman This field will keep the problem same as it is, but will give a deviation if the particle is off the circle 1 Nicolas Ponieman (due to the error of the stepper). 1 Nicolas Ponieman # Introduce discrete stochastic events simulating an artificial decay. 1 Nicolas Ponieman # Introduce a different graphical representation (such as changing the color of the scatter points) for each different type of errors. 1 Nicolas Ponieman 1 Nicolas Ponieman * What are the different possible kind of errors?