# Why high voltage power supply is required for x ray tubes?

1. ## Why high voltage power supply is required for x ray tubes?

Hi friends,
Can anyone help me regarding Xray tubes power supply design.
Pls tell me why high voltage pwr supply is required for x ray tubes.
What the specifications required for the design of this power supply.

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2. ## Re: XRay tubes power supply

High voltage is what accelerates the electrons into the anode, to produce x-rays on impact.
Roughly estimating, you need around 50kV at 3mA.

Here is a comprehensive description on how to work with an X-ray tube in a hobby environment:
http://www.instructables.com/id/How-to-X-Ray/?ALLSTEPS

Please take care, these are not the safest things to try.

3. ## Re: XRay tubes power supply

Originally Posted by Artlav
High voltage is what accelerates the electrons into the anode, to produce x-rays on impact.
Roughly estimating, you need around 50kV at 3mA.

Here is a comprehensive description on how to work with an X-ray tube in a hobby environment:
http://www.instructables.com/id/How-to-X-Ray/?ALLSTEPS

Please take care, these are not the safest things to try.
I need some more info on this, why that much of voltage is required?? With low voltages why it is not possible to produce X-rays? Is there any other tubes which can produce X-rays with low voltages??
I need of high voltage power supply design also?

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4. ## Re: XRay tubes power supply

Supply voltage is directly related to x-ray energy and penetration ability. Below 10 to 15 kV, there isn't much effect. http://en.wikipedia.org/wiki/X-ray

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5. ## Re: XRay tubes power supply

The way to produce X-ray is by acceleration electrons. Electron have a negative electric charge. So by applying a very high tension on 2 plates the electron will travel from one plate to the other. The reason why you need high voltage is because you need to accelerate them really fast because usually you have a small distance.
We all know F=m*a. If you want a big "a" with a "m" constant, you need a big "F".

6. ## Re: XRay tubes power supply

you need to accelerate them really fast because usually you have a small distance
In fact, electron energy respective speed doesn't depend on electrode distance, just total acceleration voltage.

7. ## Re: Why high voltage pwr supply is required for x ray tubes?

What kind of photon energy do you want, eV, from
decelerating the electron? That's what you've got to
put in so you can decelerate it later. N eV divided by
1 electron, well, there's your math.

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8. ## Re: Why high voltage pwr supply is required for x ray tubes?

Dear friend,

pls go thru "X rays for student radiographers" by M O Chesney & D N Chesney.

Originally Posted by shabbirn
Hi friends,
Can anyone help me regarding Xray tubes power supply design.
Pls tell me why high voltage pwr supply is required for x ray tubes.
What the specifications required for the design of this power supply.

9. ## Re: Why high voltage pwr supply is required for x ray tubes?

If you want to try , find a very old Color TV; on the first models there was no anode voltage regulator and so was quite easy to increase the voltage and go above 30 KV, starting the emission of X-RAY.

Quite dangerous.

Mandi

10. ## Re: Why high voltage power supply is required for x ray tubes?

I got yer X-ray tube right here...

A few hundred kV on a giant stack of capacitor pucks,
in a big ol' tank of SF6, makes a nice little burst that
hardly hurts anything. At least, anything that didn't
deserve it.

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