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tamara-mayer

Lunar Results - PowerPoint PPT Presentation

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Lunar Results
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  1. Lunar Results Hybrid code

  2. Initial condition Amplitude of dipole for the moon= 0 Lunar Radius=16.9 (unit of length) Maximum time = 200(inverse of gyro frequency) Size of cell in 3D= [400,400,300] Grid size in 3D= [0.5,0.5,1] Amplitude of IMF magnetic field = 1 (). Orientation of IMF: in xz plane and angle of 20 degree with Z-coordinate Solar wind initial condition: 150 particles in each cell. Initial velocity of solar wind is just on x direction. V0=3(Alfvein speed) Ratio of electron plasma pressure to magnetic pressure=0.5

  3. Unit of length= • Unit of speed= • Unit of time= • Unit of magnetic field= (upstream solar wind parameter) Unit of electric field= Unit of density= (proton number density)

  4. initialization • Magnetic field at all the mesh nodes set as IMF at initial time step. • By advancing the time, magnetic field inside the moon does not change (I turned off updating magnetic field inside the moon) but outside it is updated each time step. • Electric field at initial time step is the convection electric field • After time is going Electric field inside the moon remains the same and outside is updated in time. • Bi-Maxwellian velocity distribution is governed all ions. • if a particle hits the lunar surface, it will be removed from the calculation.

  5. Some points 1- in these figures solar wind is coming from the top to down so x is positive down ward. 2- y is positive from left of screen to the right. 3- z is outward positive.

  6. Density

  7. Density (last)