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Re: tabletop neutron generator

Posted: Sat Jun 11, 2016 7:42 am
by Rapp Instruments
Hi,
the tube is becoming cleaner because of beeing evacuated for some days and the flashover rate is decreasing substantially . So the accelerating voltage can be hold a 90 kV and I get rather hot samples. The two shortlife isotopes of silver are nicely seen.

Image

Thomas

Re: tabletop neutron generator

Posted: Mon Jun 13, 2016 9:39 am
by Dennis P Brown
Super nice work! Could you provide details (including components) for the high voltage system?

Re: tabletop neutron generator

Posted: Tue Jun 14, 2016 6:30 pm
by Rapp Instruments

Re: tabletop neutron generator

Posted: Mon Jun 20, 2016 10:18 pm
by Dennis P Brown
Really impressive work and build!

Re: tabletop neutron generator

Posted: Sat Oct 07, 2017 3:14 am
by ian_krase
It's notable that this system, unlike a fusor, does not need a high current high voltage supply.

I am actually thinking of building something in this vein.

Re: tabletop neutron generator

Posted: Tue Oct 10, 2017 11:48 am
by Dennis P Brown
While my deuterium accelerator is finished (and has collected dust now for over two years since my efforts were directed to a fusor; which I am very happy to say, was very successful), my rather large voltage multiplier (VM) that I had built for it only reached 60 kV (still haven't tested the giant Van da Graaff I built originally for that purpose - conditions just are never right); I have now added two more stages (this weekend) and then ran the variac to 50% of its scale: the new stack (in air) reached 50 kV. A good sign. So, I will next build a new oil tank and see what this monster will give me.

With a massive resistor (for safety) I will use this new VM for my accelerator; that is, if it can really achieve the +100 kV or higher (maybe.)

In any case, I am now moving on this project again, and we will soon see, I guess. If this VM fails to reach an acceptable voltage I will have to concede it is time to disassemble the accelerator and retask the high vacuum system (not sure for what. Maybe even sell it. I have to say, I like my DP system better for the fusor and have no interest for a turbo in that system.)

I will soon start a new thread and post pics of the new VM once I get this new power supply working in its new oil tank ... .

I am glad to see this thread again - got me motivated once more; still, that is a nice system.