Session 3

Primary Particles & Visualization

Objectives

  • Explain how to shoot the initial / primary particles in the simulation
  • Provide some information on the way to randomize such particle characteristics
  • Explain how to initiate, save, restart the random engine status
  • Introduce the visualization system.
    • Explain its philosophy and the concept of visualization drivers.

Presentations

  • Primary Particles ( slides )

    • Primary particle generation, G4VUserPrimaryGeneratorAction and G4VPrimaryGenerator classes, Primary vertex and primary particle, Built-in primary particle generators, Particle gun, GPS, Interfaces to HEPEvt and HepMC

  • Random number generators ( slides )

    • Introduction, HepRandom engine, /random commands

  • Visualization 1 ( slides )

    • Introduction to Visualization, Quick Looks at Eight Visualization Drivers, Basic Visualization Commands

Hands-On

  • Use of G4ParticleGun
  • Randomizing particle direction, Storing/retrieving random generator status
  • Explore vis commands