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Solving by finite difference method

by a_hoseni110
Tags: difference, finite, method, solving
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a_hoseni110
#1
Dec8-12, 06:08 AM
P: 1
hi;
I have 3 hyperbolic electrodes ,one as a ring and 2 others as endcap
electrodes which have potential v and 0 respectively.(quadrupole ion trap)
I want to solve potential inside the trap by finite difference method.

I don't know how general equations for unshaped materials will change , If I truncate my shape .
I don't know how to determine the magnitude of nodes which are on truncated line or exactly before that?

please help me
thanks a lot
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mfb
#2
Dec8-12, 11:56 AM
Mentor
P: 12,037
Where do you truncate your shape?
If the field is not too far away from uniform, you can assume a uniform field (in direction of the border) as boundary condition.


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