Plasmaballs on CFRP Surface ..

[holtmann...@googlemail.com]

Playing in the lab on friday with our high speed video camera produced
an interesting video:

http://www.youtube.com/watch?v=ce8UZbANWDA

it is a high speed video with 1000 frames/s, where you will see a
plasma torch running over a cfrp surface. Although it is an official
"potential free" plasma, you will see a flash dancing on the CFRP. The
plasma light itself is not visible.

Can anybody explan me what these colored balls are ???? I have also
better pictures and videos of this phenomena. The light source (xenon
light) was behind on the right side. Is it gas burning in the plasma?

Jens, surprised ......

[esil...@gmail.com]

Can you explain the abbreviation CFRP?
Is a CFRP carbon fiber reinforced polymer?
Anyway.
I found a line which is connected to Larger plasma. I think that line
is a plasma lines.
Then, through the plasma lines, energetic ions can strike the surface
of CFRP.
Energetic ions is from the sheath potential.
When ions heat the surface, molecules of CFRP can be scattered and
molecule bunch make a light because of sheath potential.
This is my scenario.
GoodLuck
Jangpung