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STEIN Analysis for Cinema Using GEANT4: Trajectory Confirmation of Incident Particles

This talk aims to analyze the trajectories of incident particles in Cinema's payload STEIN by confirming design input and loading Electric Field. Processes involve input geometry and parameters, tracking actions, and output analysis with GEANT4 simulation. Requirements include GEANT4 9.4 with GDML library and low-energy classes. Current results show testing with aluminum plates for incident geantino and electron particles, including plate shape and position variations. Future work includes simulating STEIN geometry and implementing electric field between parallel plates.

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STEIN Analysis for Cinema Using GEANT4: Trajectory Confirmation of Incident Particles

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  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)

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