Call for Schematics

17 04 2010

To the highly involved readers:

Anything you can design and spec (I’m talking schematic and mouser part numbers)…

I can purchase and build.

So if you ever think: “man, famulus should build  X right now”

Send me schematics and part numbers. Provided it’s pertinent to the research and within the budget… I will build it.


Here is a my first schematic challenge:

I just purchased this trigatron for discharging the mega-capacitor:

Here is the schematic for it’s use.

Here is the challenge:

Design a modern version of the triggering circuit shown in this schematic. ie, without using a “break-modulator valve”.



8 responses

18 04 2010
M. Simon

You should have done some rise time measurements of your coil set up before investing in a trigatron. If your L/R is in the microsecond or more (milliseconds) range your tube is overkill.

Such a device is only of use when the L/R of the load is less than 1 uSec.

And BTW what is the transmission line impedance of your capacitor bank?

18 04 2010

This is not for the coil power supply. This is for that huge capacitor:

18 04 2010
Raymond Rogers

You might look at this link:
Looks fairly easy. Two methods, only one tried.


18 04 2010

Exactly what I was looking for!

18 04 2010
Raymond Rogers

“Anything you can design and spec ”
No great ideas but it occurs to me that a grating or prism would be of use to track the amount of HE-4 produced. If your at a reasonable college you should be able to find a grating around; or have one made. I haven’t done the calculations but the lines should still be discernible at your temperatures. In addition rotating the grating back and forth and using a photodiode/cell/thermocouple would provide a time varying signal that would tell you the temperature; via Doppler shifting of the he4 generators being reflected in the orange line width. A lot of details involved for calibration though. I haven’t worked in this area so can’t provide a-prior guidance; but I do know a little basic physics.


18 04 2010

Did you mean HE-3?

The deuterium-deuterium reaction produces helium-3:

18 04 2010
Raymond Rogers

Ah I thought you were using the Polywell components: Beryllium. Missed something somewhere.
Nonetheless there is a reasonable line in the green as I see (468nm); of course I have no idea what “reasonable” means in this context.
A harder, but relevant, problem is determining the velocity distribution from the spectrum; and physical instrumentation implementation. Polywell apparently doesn’t work if the distribution is Maxwellian.
I can probably do the distribution->spectrum->distribution analysis; which is why I really hope somebody else has done it. It looks to be several de-convolutions; with all of the delicacy that usually requires.

18 04 2010
Raymond Rogers

Sigh: Boron of course. I have not no idea where Beryllium poped up from; except I am not that familiar with atomic physics and getting old.

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