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cpots2012.physics.uoc.gr Dept. of Physics, University of Crete Aug 19 – Sept 2, 2012

CPO TS – 2 nd ERASMUS Intensive Program Introduction to C harged P article O ptics: T heory and S imulation. http://cpots2012.physics.uoc.gr Dept. of Physics, University of Crete Aug 19 – Sept 2, 2012 Heraklion, Crete, GREECE. Group Project

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cpots2012.physics.uoc.gr Dept. of Physics, University of Crete Aug 19 – Sept 2, 2012

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  1. CPOTS – 2nd ERASMUS Intensive ProgramIntroduction to Charged Particle Optics: Theory and Simulation http://cpots2012.physics.uoc.gr Dept. of Physics, University of Crete Aug 19 – Sept 2, 2012 Heraklion, Crete, GREECE

  2. Group Project Building the International Thermonuclear Experimental Reactor (ITER) Ioannis Jordi Stefan Dr. Jason Greenwood Dept. of Physics and Astronomy Queen’s University Belfast E-mail: j.greenwood@qub.ac.uk 2 http://cpots2012.physics.uoc.gr

  3. What is ITER?

  4. Nuclear fusion research and engineering project Expected to produce ten times the amount of energy input Largest Tokamak reactor ITER

  5. Confine a plasma in the shape of a torus Helicoidal field Tokamak

  6. Fusion • Two or more atomic nuclei join together to form a single nucleus • Deuterium, tritium

  7. Parameters of ITER Central radius R0=6,2m Inner radius r0=2,0m

  8. Parameters of ITER 18 toroidal coils carrying up to 80kA giving a maximum field of 11,8T (5,3T at outer radius) Deuterium, tritium and α-particles Plasma current 15MA Plasma temperature 8keV

  9. Building ITER in SIMION Step 1 using the solenoid-example studying the .lua-file Fly´m

  10. Building ITER in SIMION Step 1 using the solenoid-example studying the .lua-file Fly´m

  11. Building ITER in SIMION Step 2a adapting the toroid-example studying the .lua-file Fly´m

  12. Building ITER in SIMION Step 2a using the toroid-example studying the .lua-file Fly´m

  13. Building ITER in SIMION Step 2b trying different particle conditions (mass, charge, angle, energy) and magnetic field strength  Trapping is not possible!

  14. Building ITER in SIMION Step 2b trying different particle conditions (mass, charge, angle, energy) and magnetic field strength  Trapping is not possible!

  15. Building ITER in SIMION Step 2b explanation for drift: gradient in the magnetic field Non homogeneous-field Stronger near center

  16. Building ITER in SIMION Step 3a adding a current loop in LUA

  17. Building ITER in SIMION Step 3b new parts in the LUA-code: local poloidal_current = 150000 local field2 = MField.hoop { current = poloidal_current, center = MField.vector(0,0,0), normal = MField.vector(0,0,1), radius = 6210 } local field = MField.combined_field{field1,field2}

  18. Building ITER in SIMION Step 4a define particles:

  19. Building ITER in SIMION Step 4b Fly´m α-particledeuteriumtritiumprotonelectron

  20. Results α-particledeuteriumtritiumprotonelectron

  21. Problems even small errors in calculation may cause „untrapping“ (Trajectory quality) Processing time!

  22. Conclusions Centered particles are trapped (theoretically forever) independent from starting direction! Particles at the edge aren´t trapped stable „trapping area“: +0,8m to -0,3m from the center-radius

  23. Thank you for your attention!

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