x-ray homemade

TheMaxii2007 · Mar 31, 2016

Very dangerous. High energy radiation .... DNA damages

it does not use x-ray human or hand. !!!!!

X-ray products images.
The easy remote control.
My ecotest terra-p or DP-5v geiger counter controls
keep away.
lead protected.
--------------------------------------------------
Good luck freinds reply

Pi R Squared · Mar 31, 2016

I look forward to seeing that if you can really do it. We're you able to buy an X-ray tube? It's not easy over here in the U.S. because they are a restricted item. Be sure to post lots of photos if you can get it working.

Alan

Razako · Mar 31, 2016

Pi R Squared said:
I look forward to seeing that if you can really do it. We're you able to buy an X-ray tube? It's not easy over here in the U.S. because they are a restricted item. Be sure to post lots of photos if you can get it working.

Alan

Huh>? You can buy them all over on ebay.

Rivem · Mar 31, 2016

Razako said:
Huh>? You can buy them all over on ebay.

Not only that. Any vaccum tube that you can supply a very high voltage to without compromising the vaccum can produce a significant amount of x-rays. Even CRTs can put some x-rays with a bit of work.

Blarg King · Mar 31, 2016

All you need for x-rays is a vacuum tube and high voltage. Theres a couple videos on YouTube of people doing it.

Pi R Squared · Mar 31, 2016

Razako said:
Huh>? You can buy them all over on ebay.

Thanks for that info, I haven't used eBay for a very long time. I didn't know they were so easily available, looks like most are pulled from decommissioned machines but there are even a few new ones for sale. I had read before that you need some government issued license to even buy one, but that may be outdated info or not true in all cases. I was just checking the FDA site for more info and there is so much and so complicated info regarding just X-ray tubes that I don't know what the regulations are, apparently there are some report of assembly requirements and labeling requirements, beyond that I don't have time to read. There are thousands of pages of documents on X-ray tubes and X-ray equipment just on the FDA site! The bureaucracy of the federal government knows no limits and is a drain on the economy, but we mustn't let that stop us.

Can anyone figure out how to build an X-ray laser? Now that would be really impressive.

Alan

DashApple · Mar 31, 2016

Pi R Squared said:
Can anyone figure out how to build an X-ray laser? Now that would be really impressive.

Alan

Build a Free electron laser - https://en.wikipedia.org/wiki/Free-electron_laser

: P

Pman · Apr 1, 2016

I don't think I'll be putting together a free electron laser anytime soon. I wouldn't call that a portable device.
The x-ray machine sounds interesting but what exactly are you planning to use it for? I've gotten so much radiation from my nuclear days and all the scans for kidney stones that multiple doctors have told me to push not getting anymore unless it's absolutely necessary.

Sigurthr · Apr 2, 2016

Look forward to seeing your results. I recently finished a similar project, it's in the Geek's Corner section. Also, I'm selling a perfect x-ray tube on ebay right now too.

Benm · Apr 2, 2016

I don't see why x-ray tubes should be that hard to obtain at all, or why they would be restricted in any way... but then again, i dont live in the US.

The main reason tinkering with these things is dangerous is, in my opninion, the power supply required. Obviously at least tens of kV's are required to produce x-rays, and with a decent bit of current behind that as well - the sort of thing that can kill you if you're not even really touching it yet.

As for producing x-rays using 'ordinary' vacuum tubes like triodes and such: yes, it can be done as a demonstration, but the intensity will be low and the lifespan limited. Another thing to use could be a CRT display tube driven at overvoltage (say 50 kV anode supply).

Getting a complete unit like a dental x-ray machine probably is best since that contains a matched set of transformer, rectifier and tube which should be good to go, unless that was the faulty part it was discarded for. This is not always the case though, they can be discarded in working order just because there is a new model on the market that produces better images - you'd be surprised how much high tech stuff ends up in waste skips in perfectly working order.

Benm · Apr 5, 2016

I hope it pans out for you, and we get some nice images

Don't mess with the electrical side of these things though, the power supply will kill you if you start poking around in that.

Seoul_lasers · Apr 5, 2016

Pi R Squared said:
Thanks for that info, I haven't used eBay for a very long time. I didn't know they were so easily available, looks like most are pulled from decommissioned machines but there are even a few new ones for sale. I had read before that you need some government issued license to even buy one, but that may be outdated info or not true in all cases. I was just checking the FDA site for more info and there is so much and so complicated info regarding just X-ray tubes that I don't know what the regulations are, apparently there are some report of assembly requirements and labeling requirements, beyond that I don't have time to read. There are thousands of pages of documents on X-ray tubes and X-ray equipment just on the FDA site! The bureaucracy of the federal government knows no limits and is a drain on the economy, but we mustn't let that stop us.

Can anyone figure out how to build an X-ray laser? Now that would be really impressive.

Alan

Lots of places stock X-ray tubes... they're easy enough to get.. however finding a proper HVDC supply
is going to take a bit of work $$$$!, or home build it.

Seoul_lasers · Apr 5, 2016

Benm said:
I don't see why x-ray tubes should be that hard to obtain at all, or why they would be restricted in any way... but then again, i dont live in the US.

The main reason tinkering with these things is dangerous is, in my opninion, the power supply required. Obviously at least tens of kV's are required to produce x-rays, and with a decent bit of current behind that as well - the sort of thing that can kill you if you're not even really touching it yet.

As for producing x-rays using 'ordinary' vacuum tubes like triodes and such: yes, it can be done as a demonstration, but the intensity will be low and the lifespan limited. Another thing to use could be a CRT display tube driven at overvoltage (say 50 kV anode supply).

Getting a complete unit like a dental x-ray machine probably is best since that contains a matched set of transformer, rectifier and tube which should be good to go, unless that was the faulty part it was discarded for. This is not always the case though, they can be discarded in working order just because there is a new model on the market that produces better images - you'd be surprised how much high tech stuff ends up in waste skips in perfectly working order.

I was going to add that building a variable HVDC power-supply is not too difficult. A 8 stage Walton-cockcroft multiplier or a dual flyback based ZVS circuit should be able to provide enough potential to get a decent picture from a fairly high power tube (110-150Kvdc). Just please ... please before fooling around with X-rays have a dosimeter, and a calibrated ion-survey meter or a GM counter capable of displaying mSv/hr !! X-ray tubes are more than capable of inflicting SERIOUS life threatening radiation burns.
Make sure you can remote operate the tube and that you have some decent Lead shielding thus preventing stray Radiation from hitting cameras, FLASH memory, other sensitive electronics as well as your crown jewels. :wave:

planters · Apr 5, 2016

Making the x rays should not be hard. Either a commercial tube or a home made tube can work. To get a good amount of current through the vacuum, don't forget to use a good emitter. Something with a low electron work function and a steady heater will provide the cloud of free electrons. The HV is for accelerating these electrons toward the metal target.

The bigger challenge will be to first filter the energy to a narrow wavelength range with a low energy absorber and I think an aluminum plate is used for this. Next, you need to mask the output so that it originates from a reasonably small aperture. Finally, what do you want to image?

Benm · Apr 6, 2016

Excellent results for a first test with a fluorescent screen!

Seoul_lasers said:
Just please ... please before fooling around with X-rays have a dosimeter, and a calibrated ion-survey meter or a GM counter capable of displaying mSv/hr !! X-ray tubes are more than capable of inflicting SERIOUS life threatening radiation burns.

This type of x-ray unit is NOT capable of causing an acute (in the sense of delivering a fatal dose in seconds) radiation hazard. Very lage systems, like those used to scan whole cargo containers, may be acutely dangerous.

Acutely fatal doses don't even register on a simple geiger counter (it will just display overload, far far before you are in acute danger, because the tube can only detect a few hundred, maybe thousand, breakdowns a second).

It's important to understand orders of magnitude and units when dealing with ionizing radiation. Typical counters give a number in micro or milisieverts per HOUR. Normal background radiation is in the order of 2 mSv/YEAR depending a bit where you live.

That geiger counter will probably be blaring alarms at 2 mSv/HOUR, and you should not remain in such an environment for an hour given the option. So what if you decided to put your hand in the beam at that radiation level? Actually nothing if you did it for a short picture as is commonly done with x-rays in hospitals. There are 3600 seconds in an hour, so at 2 mSv/HOUR your looking at under 1 uSV for a second.

This doesn't mean you should be careless with these devices, especially if you use them often. The increased risk of cancer and such is certainly something to consider, but acute radiation sickness by the ouput of a dental or medical x-ray device is simply not possible, the lack the output power to do so.

Radiologists wear shielded cloths and/or hide behind screens because they are exposed several times every day increasing their risk of long term problems, not because they have -any- chance of getting acute sickness from a days work.

Seoul_lasers · Apr 6, 2016

Benm said:
Excellent results for a first test with a fluorescent screen!

This type of x-ray unit is NOT capable of causing an acute (in the sense of delivering a fatal dose in seconds) radiation hazard. Very lage systems, like those used to scan whole cargo containers, may be acutely dangerous.

Acutely fatal doses don't even register on a simple geiger counter (it will just display overload, far far before you are in acute danger, because the tube can only detect a few hundred, maybe thousand, breakdowns a second).

It's important to understand orders of magnitude and units when dealing with ionizing radiation. Typical counters give a number in micro or milisieverts per HOUR. Normal background radiation is in the order of 2 mSv/YEAR depending a bit where you live.

That geiger counter will probably be blaring alarms at 2 mSv/HOUR, and you should not remain in such an environment for an hour given the option. So what if you decided to put your hand in the beam at that radiation level? Actually nothing if you did it for a short picture as is commonly done with x-rays in hospitals. There are 3600 seconds in an hour, so at 2 mSv/HOUR your looking at under 1 uSV for a second.

This doesn't mean you should be careless with these devices, especially if you use them often. The increased risk of cancer and such is certainly something to consider, but acute radiation sickness by the ouput of a dental or medical x-ray device is simply not possible, the lack the output power to do so.

Radiologists wear shielded cloths and/or hide behind screens because they are exposed several times every day increasing their risk of long term problems, not because they have -any- chance of getting acute sickness from a days work.

They most certainly can inflict deep necrotizing burns. I am emphasizing the safety needed while using these tubes. X-rays are quite penetrating. Distance and heavy shielding is going to help a great deal here.

I'm not suggesting X-rays from tubes are instantly lethal, just that they can and will do significant damage unless you've got some way of knowing what kind of field you have and when they are actually emitting. Deep Radiation burns can and will cause sepsis or an abscess and that is potentially lethal.

Below is a sample of a single fluoroscopy exposure left too long.

Please please... safety first.

x-ray homemade

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