I
Ignoramus29428
- Jan 1, 1970
- 0
I finally picked up the caps from Fermilab. Each of them weighs about
40 lbs and they look nice, very cute color also.
So... I would like to make some sort of a pulse discharge thingy from
readily available materials. Can crushing would be my first choice.
My plan is as follows, to use copper pipe as conductor. I bought some
HV diode stack (4 7.5 kV diodes) and a HV probe.
The first thing to make would be a reliable system for discharging the
caps safely, and test it at low voltages. I would probably want to use
two 12 MEG Victoreen resistors in series a permanently attached
bleeder.
With four 1 uF caps, RC would be 2*12,000,000 * 4/1000000 = 96, which
is hopefully acceptable, and power dissipation in the resistors will
be about 3W per resistor.
My main questions concern the spark gap. How to practically make a
decent spark gap, and also how to safely trigger it.
For instance, would 3/4" brass balls such as McMaster item 9617K47, be
adequate? If not, I have 3/16" tungsten electrodes. Would they make an
adequate spark gap?
If not, can I use sections of, say, 1" copper pipe, placed at some
distance with their axes perpendicular?
Also, what is the best way ot safely triggering a spark gap. My
understanding is that there is a rule of one inch per 15 kV. Would
making the gap 1.5" and injecting some argon into it be a safe
and effective triggering method?
I am going to do a lot more reading and I will post my "design" here
and get it to pass some consensus before implementing it.
i
40 lbs and they look nice, very cute color also.
So... I would like to make some sort of a pulse discharge thingy from
readily available materials. Can crushing would be my first choice.
My plan is as follows, to use copper pipe as conductor. I bought some
HV diode stack (4 7.5 kV diodes) and a HV probe.
The first thing to make would be a reliable system for discharging the
caps safely, and test it at low voltages. I would probably want to use
two 12 MEG Victoreen resistors in series a permanently attached
bleeder.
With four 1 uF caps, RC would be 2*12,000,000 * 4/1000000 = 96, which
is hopefully acceptable, and power dissipation in the resistors will
be about 3W per resistor.
My main questions concern the spark gap. How to practically make a
decent spark gap, and also how to safely trigger it.
For instance, would 3/4" brass balls such as McMaster item 9617K47, be
adequate? If not, I have 3/16" tungsten electrodes. Would they make an
adequate spark gap?
If not, can I use sections of, say, 1" copper pipe, placed at some
distance with their axes perpendicular?
Also, what is the best way ot safely triggering a spark gap. My
understanding is that there is a rule of one inch per 15 kV. Would
making the gap 1.5" and injecting some argon into it be a safe
and effective triggering method?
I am going to do a lot more reading and I will post my "design" here
and get it to pass some consensus before implementing it.
i