STEIN Analysis for CINEMA Using GEANT4

1. STEIN Analysis for CINEMAUsing GEANT4 Seongha Park Kyung Hee University

2. Contents of This Talk 1. Purpose 2. Processes 3. Requirements 4. Current Result 5. Future Work & Summery

3. Purpose 1) To confirm one of main payloads of CINEMA, STEIN, input the design of STEIN and load Electric Field for checking the trajectories of incident particles 2) Make two parallel plates as deflector of the STEIN and load Electric Field between the two plates to check trajectories of incident particles (e-, e+)

4. Processes • Input geometry • Input STEIN model : GDML format • Or directly: World Volume, Aluminum Plate • Input parameter for analysing • Variety of particle, energy, definition of physics • Add contents for tracking • Output change of energy, change of position, etc. • Run and get result from GEANT4 • Visualize the result and getraw data Geometry Parameters Tracking Action

5. Con’d Action • Action • Event (Trajectory) Run 0 Run 1 Event 0 Event 1 Event 2 Event 0 Event 1 Event 2 Event 0 Step 0 ~ Step 8

6. Requirements • GEANT4.9.4 with GDML library • Low Energy Classes ( Penelope, Livermore : threshold ~250eV) Penelope : Compton, Gamma Conversion, Rayleigh, Photoelectric (g-rays), Ionisation, Bremsstrahlung (e±), Annihilation Livermore : Compton, Gamma Conversion, Rayleigh, Photoelectric (g-rays), Ionisation, Bremsstrahlung (e- only) Livermore Polarized : Compton, Rayleigh (g-rays) • STEIN model (GDML format)

7. Current Result • Make an aluminum plate, incident particles are geantino.

8. Con’d y z x

9. Con’d • Make an aluminum plate, incident particles are geantino • The same Geometry, incident particles are electrons

10. Con’d y z x

11. Current Result • Make an aluminum plate, incident particles are geantino • The same Geometry, incident particles are electrons • Change the shapeof the plate (rotate 90˚), apply standard physics

12. Con’d y z x

13. Con’d y x

14. Current Result • Make an aluminum plate, incident particles are geantino • The same Geometry, incident particles are electrons • Change the position of the plate (rotate 90˚), apply standard physics • Apply low energy physics (Penelope model)

15. Con’d y z x

16. Con’d y x

17. Current Result • Make an aluminum plate, incident particles are geantino • The same Geometry, incident particles are electrons • Change the position of the plate (rotate 90˚), apply standard physics • Apply low energy physics (Penelope model) • Apply electric field (no consideration of direction and range)

18. Con’d y z x

19. Con’d y x

20. Future Work & Summary • To simulate with STEIN geometry, up to here, I’ve learn how to use GEANT4 with simple examples. So, from now on, • Make a pair of parallel plates • Load electric Field between • Read the geometry of STEIN and do purpose 2)