Discussion in 'General Electronics Chat' started by antonio07, Apr 17, 2010.

1. ### antonio07 Thread Starter New Member

Apr 17, 2010
3
0
hi,

i have to carry out some experiments about insulating specimens.

May anyone suggest me how produce the corona discharge in such specimens?

these specimens are circular, with a radius about 1.58 inch (4 cm)

thank you.

2. ### beenthere Retired Moderator

Apr 20, 2004
15,815
283
"I have to" might suggest some laboratory environment. What are the circumstances you have in terms of equipment and resources, plus the means of controlling the high voltages?

3. ### antonio07 Thread Starter New Member

Apr 17, 2010
3
0
you are right: i am an italian student who are doing these experiments for the thesis of the master degree.

My specimens are nanocomposites with resistivity abot 3*10^12 Ohm*m, the maximum electric field will be about 5MV/m, the specimens have a thickness about 0.1 inch (0.2 mm).

i have a picoamperometer, a regulated power supply and a shielded chamber.

excuse me for my broken english.

thank you

4. ### retched AAC Fanatic!

Dec 5, 2009
5,201
313
Well, that should about cover it.

I am interested.. What types of materials are you using for coronal discharge at such small power levels?

5. ### antonio07 Thread Starter New Member

Apr 17, 2010
3
0
the voltage will be 5MegaVolt/m, the corona discharge shoud occur in the nanocomposites...it should simulate the effect of ageing...

6. ### retched AAC Fanatic!

Dec 5, 2009
5,201
313
Sorry, I read it as 5 millivolt... Geez.. I was off by a few zeros... and a decimal point.

7. ### Wendy Moderator

Mar 24, 2008
20,772
2,540
So you have a power supply capable of producing the voltages you need?

Are you doing these experiments at 15PSI, or in a vacuum?