home made x-ray machine 2

http://c4r0.skrzynka.org/_hv/index.php?page=_xrays

This stuff uses the same DY-86 vacuum tube as in previews video, but it is powered not from ignition coils but from C-W voltage multiplier from old TV set and a TV flyback transformer drove by Mazzilli's ZVS circuit. It gives about 30-40kV DC (not pulses) and relative high current. The vacuum tube is sunk in mineral oil to provide better insulation. At the beginnign of the video you can see blue light inside the tube - the glass envelope of the tube glows blue mostly becouse of electrons that strikes its inside walls, and less becouse of x-rays. After a few seconds there is a yellow, bright light. It is the steel cathode inside the tube heated to hundred of celsius degrees by electron beam. It means that there is too much current. A few seconds longer and the cathode would start to melt and the tube would be destroyed. The radiation is much stronger than in the other video with ignition coils, but it's still not enough to make x-ray pictures, mostly becouse of relative low voltage (there is a lot of radiation but the energy of photons is low).

This experiment is much more dangerous than previous one, becouse the radiation is much stronger.

!!! DO NOT TRY IT AT HOME !!!

I have a lead apron and adequate equipment to measure ionising radiation level, and also essential knowledge about high voltage and x-rays. Believe me that i know what i'm doing and i know how to do it safely, and believe that if you don't, it's realy dangerous for you and people around you.

Category:

Science & Technology

Tags:

• x-rays
• xrays
• x-ray
• xray
• machine
• home
• made
• homebrew
• rtg
• roentgen
• rentgen
• hv
• high
• voltage
• wysokie
• napiecie
• promieniowanie
• promieniotworcze
• gamma
• beta
• geiger
• counter
• dosimeter
• dozymetr
• licznik
• geigera

[davethehunter2]

have you tried soaking the vacuum tube in a mason jar of oil, all real xray tubes keep cooled by oil. your tube would last longer and you would get longer exposures in one run

[c4r0hv]

@davethehunter2

The tube in this video IS under oil. But in this case oil is for HV insulation, not for cooling. Real x-ray tube's anode is designed in a way to have high efficiency of heat transfer to the outside world (which is oil in this case). That's why oil improves cooling - it acts as a heatsink. The tube in this video is just a low power vacuum rectifier and there's no good way of transfer anode heat to the outside of the glass tube, so oil acrually doesn't help that much.

[yo6ial]

@c4r0hv

Did you ever leave the current on for extended periods?

I mean, does that diode cracks from the thermal shock?

And, as the anode goes white-hot, does the X emission change?

[c4r0hv]

@yo6ial

I didn't leave it for long time, but I'm pretty sure the glass would crack quickly. I didn't notice any change after the anode got white hot.

[emailmemrstara]

Uh your going to get cataracts and a nice brain tumor.

[c4r0hv]

@emailmemrstara

Thank you sir for the diagnosis. So far, I'm quite fine.

[toranamunter]

All radioactivity related equipment must be Russian. Its just cooler that way.

[c4r0hv]

I would not be so sure about that... Do you even know what asbestos is and why it's cancerigenic? ...

[yo6ial]

@c4r0hv Thanks for the info. I appreciate it!

So, I'll guess I'll sacrifice a diode or two to find out :D

Cheers!

[pmgodfrey]

@c4r0hv

Let's check back in 40 years because exposure to radiation doesn't produce immediate effects. Just because you're fine now doesn't mean you won't be later down the road.

[kaboooom2000uk]

Very creative. I am pleased you posted this video, what are the operating specifications of your running setup? were you also able to use the tube generate xray images with a photographic plate, or simply testing an idea? It would be interesting to see more.

[Titanit01]

@emailmemrstara

X-ray head examination si so rare and dangerous :-))) Isn't it? :D

[lukebaldan]

@toranamunter

In soviet russia, measuring device kills you!