PLAN Anti-ship/surface missiles

vesicles

vesicles

Colonel
SamuraiBlue said:
No, ionized plasma doesn't absorb elector-magnetism it just bounces it back so the whole ionized plasma field will shine brightly on any radar screen from the out side. From the inside smothered within the field nothing goes out and just bounces within.
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I thought ionized plasma was the ultimate way to make things stealthy...

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SamuraiBlue

SamuraiBlue

Captain
vesicles said:
I thought ionized plasma was the ultimate way to make things stealthy...

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From what I can read and tell from this article is that EM absorbing plasma requires to be cold plasma in which would be able to absorb the EM energy and transfer it into heat but the plasma surrounding a re-entry vehicle would already be super heated and thus not able to absorb the energy.

Common plasmas temperature and density in fluorescent light tubes and semiconductor manufacturing processes are around several eV and 109-12per cm3. For a wide range of parameters and frequencies, plasma is electrically conductive, and its response to low-frequency electromagnetic waves is similar to that of a metal: a plasma simply reflects incident low-frequency radiation. Low-frequency means it is lower than the characteristic electron plasma frequency.
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The use of plasmas to control the reflected electromagnetic radiation from an object (Plasma stealth) is feasible at suitable frequency where the conductivity of the plasma allows it to interact strongly with the incoming radio wave, and the wave can either be absorbed and converted into thermal energy, or reflected, or transmitted depending on the relationship between the radio wave frequency and the characteristic plasma frequency. If the frequency of the radio wave is lower than the plasma frequency, it is reflected. if it is higher, it transmit. If these two are equal, then resonance occurs.
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vesicles

vesicles

Colonel
SamuraiBlue said:
From what I can read and tell from this article is that EM absorbing plasma requires to be cold plasma in which would be able to absorb the EM energy and transfer it into heat but the plasma surrounding a re-entry vehicle would already be super heated and thus not able to absorb the energy.
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Can you define "cold" vs "hot" plasma? Even cold plasma has elevated temp. How do you know the heat generated by the re-entry vehicle would qualify as "hot" plasma?

The temperature scale is all relative. High-temp superconducting occurs at ~140 kelvin, which is ~140 deg below zero. That's still cold...

So we have no clue whether the plasma generated by the re-entry vehicle should be classified as cold or hot...
 
J

JackyLiu

New Member
Registered Member
Found this video about China's military drill in the SCS not long ago, a large proportion of it was introduction to the YJ-12 ASM, I think it's not been posted here yet.

Missiles like the YJ-12 was designed to pose a threat to CSGs, but the intro doesn't seem to take into account the early warning ability of the CSG and its ability to defend itself against incoming aircrafts, I wonder how well could a CSG defend itself from the launching aircrafts at 300 to 400 km distance.

https://www.facebook.com/video.php?v=1806206459624167
 
Jeff Head

Jeff Head

General
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A
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