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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 - PowerPoint PPT Presentation
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CPOTS – 2nd ERASMUS Intensive ProgramIntroduction to Charged Particle Optics:
Theory and Simulation
http://cpots2012.physics.uoc.grDept. of Physics, University of Crete
Aug 19 – Sept 2, 2012 Heraklion, Crete, GREECE
http://cpots2012.physics.uoc.gr 2
Group ProjectBuilding the International Thermonuclear
Experimental Reactor (ITER)
IoannisJordi
Stefan
Dr. Jason GreenwoodDept. of Physics and Astronomy
Queen’s University BelfastE-mail: [email protected]
What is ITER?
ITER Nuclear
fusion research and engineering project
Expected to produce ten times the amount of energy input
Largest Tokamak reactor
Tokamak
Confine a plasma in the shape of a torus
Helicoidal field
Fusion Two or more atomic
nuclei join together to form a single nucleus
Deuterium, tritium
Parameters of ITER Central radius R0=6,2m Inner radius r0=2,0m
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
Building ITER in SIMIONStep 1 using the solenoid-example studying the .lua-file Fly´m
Building ITER in SIMIONStep 1 using the solenoid-example studying the .lua-file Fly´m
Building ITER in SIMIONStep 2a adapting the toroid-example studying the .lua-file Fly´m
Building ITER in SIMIONStep 2a using the toroid-example studying the .lua-file Fly´m
Building ITER in SIMIONStep 2b trying different particle conditions
(mass, charge, angle, energy) and magnetic field strength Trapping is not possible!
Building ITER in SIMIONStep 2b trying different particle conditions
(mass, charge, angle, energy) and magnetic field strength Trapping is not possible!
Building ITER in SIMIONStep 2b explanation for drift: gradient in the
magnetic field Non homogeneous-field Stronger nearcenter
Building ITER in SIMIONStep 3a adding a current loop in LUA
Building ITER in SIMIONStep 3b new parts in the LUA-code:local poloidal_current = 150000local 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}
Building ITER in SIMIONStep 4adefine particles:
Particle Symbol
Charge
[e]Mass[amu]
Energy
[keV]Colour
α-Particle
42He 2+ 4 4.00
0red
Deuterium
21D 1+ 2 100 green
Tritium 31T 1+ 3 100 blue
Proton p 1+ 1 100 pink
Electron e 1- 5*10-4
100 cyan
Building ITER in SIMIONStep 4b Fly´m
α-particledeuteriumtritiumprotonelectron
Results
α-particledeuteriumtritiumprotonelectron
Problems
even small errors in calculation may cause „untrapping“ (Trajectory quality)
Processing time!
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
Thank you for your attention!