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Assuming two concentric tubes, both conductors with a field between them.
Does introducing a plastic, say nylon in the field change it in any way?
Direction? Field strength?
Thanks, Mikek
Sure. Just like a piece of coaxial cable, the dielectric constant or
permittivity will change the characteristic impedance and propagation
delay.
Or, if you like, the material will change the capacitance between
them.
boB
On Saturday, August 26, 2023 at 2:34:00?PM UTC-5, boB wrote:
Sure. Just like a piece of coaxial cable, the dielectric constant or
permittivity will change the characteristic impedance and propagation
delay.
Or, if you like, the material will change the capacitance between
them.
boB
Sorry that does [not] help me understand. This is goes back to the two insulated plate electrodes
with an emulsion between them. I want to know, if I introduce a plastic sleeve over part or all
of of one of the electrodes, do I still have the same V/cm treating my emulsion?
Sorry that does [not] help me understand. This is goes back to the two insulated plate electrodes
with an emulsion between them. I want to know, if I introduce a plastic sleeve over part or all
of of one of the electrodes, do I still have the same V/cm treating my emulsion?
No.
.<https://www.youtube.com/watch?v=BXczXJNQvWs
Joe Gwinn
On Saturday, August 26, 2023 at 2:34:00?PM UTC-5, boB wrote:
Sure. Just like a piece of coaxial cable, the dielectric constant or
permittivity will change the characteristic impedance and propagation
delay.
Or, if you like, the material will change the capacitance between
them.
boB
Sorry that does help me understand. This is goes back to the two insulated plate electrodes
with an emulsion between them. I want to know, if I introduce a plastic sleeve over part or all
of of one of the electrodes, do I still have the same V/cm treating my emulsion?
Thanks, Mikek
On Saturday, August 26, 2023 at 2:34:00â¯PM UTC-5, boB wrote:
Sure. Just like a piece of coaxial cable, the dielectric constant or
permittivity will change the characteristic impedance and propagation
delay.
Or, if you like, the material will change the capacitance between
them.
boB
Sorry that does help me understand. This is goes back to the two insulated plate electrodes
with an emulsion between them. I want to know, if I introduce a plastic sleeve over part or all
of of one of the electrodes, do I still have the same V/cm treating my emulsion?
On Saturday, August 26, 2023 at 12:49:34?PM UTC-7, Lamont Cranston wrote:
On Saturday, August 26, 2023 at 2:34:00?PM UTC-5, boB wrote:
Sure. Just like a piece of coaxial cable, the dielectric constant or
permittivity will change the characteristic impedance and propagation
delay.
Or, if you like, the material will change the capacitance between
them.
boB
Sorry that does help me understand. This is goes back to the two insulated plate electrodes
with an emulsion between them. I want to know, if I introduce a plastic sleeve over part or all
of of one of the electrodes, do I still have the same V/cm treating my emulsion?
Yes, kinda. The volts dropped in the plastic can be different from the (gas, liquid) fill, if
the dielectric constants mismatch. In the extreme case of very high dielectric constant,
it\'s the same as changing a metal electrode diameter. In the extreme case of very low
dielectric constant, it\'s a match for vacuum.
On Sat, 26 Aug 2023 14:55:41 -0700 (PDT), whit3rd <whi...@gmail.com
wrote:
On Saturday, August 26, 2023 at 12:49:34?PM UTC-7, Lamont Cranston wrote:
...I want to know, if I introduce a plastic sleeve over part or all
of of one of the electrodes, do I still have the same V/cm treating my emulsion?
Yes, kinda. The volts dropped in the plastic can be different from the (gas, liquid) fill, if
the dielectric constants mismatch. In the extreme case of very high dielectric constant,
it\'s the same as changing a metal electrode diameter. In the extreme case of very low
dielectric constant, it\'s a match for vacuum.
OK, I see I think.
If the dielectric is between the two concentrics, then it will change
things. But if it is around the whole thing, then not so much.
Does that sound right ?
Well, no; the issue is that the dielectric has (resistive and capacitive) conductivity,
and is in series with the (resistive and capacitive) conductivity of the emulsion.
It\'s a voltage divider, with a voltage ratio that depends on the unknown emulsion as much
as the (presumably known) dielectric. The \"V/cm\" measure, though, can remain
constant, if the emulsion and dielectric are matching materials; you\'ve
changed both the \"V\" and the \"cm\" parts by displacing emulsion with
the dielectric.
On Saturday, August 26, 2023 at 2:34:00â¯PM UTC-5, boB wrote:
Sure. Just like a piece of coaxial cable, the dielectric constant or
permittivity will change the characteristic impedance and propagation
delay.
Or, if you like, the material will change the capacitance between
them.
boB
Sorry that does help me understand. This is goes back to the two insulated plate electrodes
with an emulsion between them. I want to know, if I introduce a plastic sleeve over part or all
of of one of the electrodes, do I still have the same V/cm treating my emulsion?
Thanks, Mikek
Assuming two concentric tubes, both conductors with a field between them.
Does introducing a plastic, say nylon in the field change it in any way?
Direction? Field strength?
Thanks, Mikek
On Saturday, August 26, 2023 at 3:12:43?PM UTC-4, Lamont Cranston wrote:
Assuming two concentric tubes, both conductors with a field between them.
Does introducing a plastic, say nylon in the field change it in any way?
Direction? Field strength?
Thanks, Mikek
Illustration:
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/dielec.html
Nylon relative permittivity is in range of 4-5:
https://www.engineeringtoolbox.com/relative-permittivity-d_1660.html
But that\'s just by how much field strength E is reduced for a given charge.
On Saturday, August 26, 2023 at 3:03:55?PM UTC-7, boB wrote:
On Sat, 26 Aug 2023 14:55:41 -0700 (PDT), whit3rd <whi...@gmail.com
wrote:
On Saturday, August 26, 2023 at 12:49:34?PM UTC-7, Lamont Cranston wrote:
...I want to know, if I introduce a plastic sleeve over part or all
of of one of the electrodes, do I still have the same V/cm treating my emulsion?
Yes, kinda. The volts dropped in the plastic can be different from the (gas, liquid) fill, if
the dielectric constants mismatch. In the extreme case of very high dielectric constant,
it\'s the same as changing a metal electrode diameter. In the extreme case of very low
dielectric constant, it\'s a match for vacuum.
OK, I see I think.
If the dielectric is between the two concentrics, then it will change
things. But if it is around the whole thing, then not so much.
Does that sound right ?
Well, no; the issue is that the dielectric has (resistive and capacitive) conductivity,
and is in series with the (resistive and capacitive) conductivity of the emulsion.
It\'s a voltage divider, with a voltage ratio that depends on the unknown emulsion as much
as the (presumably known) dielectric. The \"V/cm\" measure, though, can remain
constant, if the emulsion and dielectric are matching materials; you\'ve
changed both the \"V\" and the \"cm\" parts by displacing emulsion with
the dielectric.