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Electric field will continue to distort and redistributed according to accumulated ions, and will eventually be at electric equilibrium, which is somehow similar to total electric shielding inside a metal bore. Is the analysis reasonable?
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The major driving force for ions...
Both RF and DC will be used. I need to investigate DC behavior at the first step.
Ions will be deflected to inner wall of the glass bore, and then there will be excessive charge density inside the bore.
According to ion current observed (~100pA) and surface area of glass bore (~300 mm^2)...
Yes, I have done a preliminary estimation of expected deflection.
A high speed gas flow drives ions to travel through the glass bore. The speed of ions were several hundreds m/s. Traveling through the outside E-field region typically last for several milliseconds. Although the traveling speed...
Electric field penetrating glass tube
Hi, as discussed in previous thread, I want to create electric field inside a glass bore.
Previous thread:
https://www.edaboard.com/threads/330196/#post1409914
Through simulations, I have seen possibility of E field inside a glass bore. But then comes my...
Thanks so much.
So the in-bore field strength is overcompensated and slightly higher. I wonder how much will the field direction be distorted in the in-bore region? since I see less information in the in-bore region in your attached picture. Would you show me the field in-bore with slightly...
Distance between electrodes are slightly larger than outer diameter of the glass (~0.5mm).
From your simulation, I see a nearly uniform electric field in that central hole region, which is actually the useful region in my application. Since the region is so small (i.d. ~0.5mm), the distortion...
Re: RF electric field penetrating glass tube
Exactly, it's a glass cylinder. And the working area is hollow area within (full of air). So the glass acts as a barrel.
The parallel electrodes outside are separated by ~10mm.
Re: RF electric field penetrating glass tube
Thanks FvM.
For the glass tube, the outer diameter is ~10mm, and the inner diameter is ~0.5mm. So the thickness is ~5mm.
RF I used is at ~1MHz.
I have no idea whether this frequency is high or low for considering modifying effect caused by glass...
Hi, I am designing a RF electric field inside a glass tube. I have some questions not quite sure.
The glass tube is of 200mm long and 10mm diameter. The RF electric field is perpendicular to the glass tube, and is applied through a parallel of metal plates. I would like to use electric field...
Thanks very much.
So now I understand what I am measuring is actually a DC resistance of an inductor. When inputting RF signal, the impedance will not stay zero.
At the first glance, the phenomenon do surprise me (counter-intuitively). Since the outer electrode was connected to an instrument...
Hi, recently I found a confusing phenomenon in lab. The output of linear rf amplifier and its ground was measured to be a 0 ohm resistance, which means the output of the amplifier is grounded. The same phenomenon was seen on 180 degree power splitter, which also has its output grounded.
I know...
Hi chuckey, although limit current of my DC power supply was set to be 1A, I don't think there is a DC current in the circuit, since the output is simply applied on a float electrode. I am using voltage and electric field within. R1 was removed, and let the two nodes across it to be open.
But...
Hi, I am working on generating a high voltage RF signal floated on a small DC voltage. The basic network I used is attached. RF signal was generated by resonance LC tank, and DC was from a DC power supply to generate ~10V.
Since the RF I used is 5kVpp @ ~1MHz, to protect DC power supply, the...
Thank you, Venkadesh_M. The problem now solved.
I think it is due to our engineer has somehow miss connected of ground line to home-made power supply. Since we have one that work correctly, a comparison between those two gives engineer a hint. He reconnected wiring and now the supply works...
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