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Re: CST PIC Solver Questions
I reckon the particle preview contains erroneous results for some reason... I wouldn't know why any particle can reach to energies more than that of the anode potential.
For the parameters "scaling" and "exponential" you can check the standard fowler nordheim...
So...
I want to define a nonlinear resistance that:
1.its current function is dependent on the voltage across it (arbitrary power of it)
and also
2.is multiplied by an independent function of time (a polynomial of time).
i.e.: I(V,t)=P(t)*V(t)^a
Is something like that possible in ADS?
Regards
E,H field directions
near the antenna, the e-field is in general as the axis of the dipole and the h-field is in the phi-direction. but as you move further, this is not the case. they slowly change into spherical symmetry with the e and h fields perpendicular to the spherical r-coordinate.
i...
Epsilon r of Salt Water
I would say, the real part of epsilon remains the same, but an imaginary part with the parameter sigma*frequency*mju0 gets there also, making the refractive index a complex number, thus represanting the attenuation of the electromagnetic field.
I guess, finding an...
discharge a high voltage pulse capacitor into a coil to get 20.000 amps of current or more, and you will get a tesla! but for less than 1usec of duration...
the coil will more likely explode by the magnetic forces, but hey, that is worth a try!
Let's say you define a plane diode, with a cylinder cathode of some radius over a plane anode. You also put some potentials on the anode and the cathode. I always put fixed potentials, coz i dont have much confidence on how would floating potentials work.
Setting a particle source on the face...
The problem with the pic solver is that it has only these two types of emission. The others (thermionic, space charge limited, etc) refer to the tracking solver. Getting some results from the tracking solver and putting them back into the pic solver might be some approach, but it doesn't seem to...
the example that cst PS 2008 has for the klystron cell is somewhat childish, but informative.
i have not yet tried a full tube simulation, let's say of a klystron, that would include pic simulation of the electron gun, RF signal injection and RF signal extraction out of the cavity. if i ever...
Re: Simulation of pin-cathode - anode discharge arc with CST
To get better results for the vacuum diode with explosive electron emission, one has to put into account the gap surface expansion and closure effects due to cathode and anode plasmas.
Time dependend solids that serve as particle...
useless suggestion:
copy the project to a new, clean location of your harddrive.
this sometimes solves simulation errors!
(or moves the error to an other step)
Does anyone have any hint/idea on what would be the best way to simulate
an anode foil or a mesh anode with cst particle studio?
Making a design with many small cylinders so as to essentially recreate an anode mesh,
and with appropriate denser local meshing, is increasing a lot the problem...
I would like to simulate the electron current flow that passes through a pin-cathode and a grounded anode plane in the case of a spark discharge.
Does anybody have any hint on how to properly set up the particle source on the pin tip and what would be the best parameters for the model?
I do...
Hello Athina,
I guess you have to just model a simple open-circuit coaxial line, and its variable length would give you insight on any resonances that might shift down the matching to lower frequencies.
Coaxial cables have standard dimensions (for example the rg-213) and are almost all filled...
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