Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [x-rays]

19 questions
7
votes
2 answers

Do neon signs emit x-rays?

I'm interested about whether or not a conventional neon sign such as this one could emit x-ray that could be harmful. The sign that you can see in the picture is just below my office window so I'm basically sitting like 8 hours a day about 2 meters…
Raaas
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5
votes
1 answer

Why do spectrum analyzers generate X-Rays

Most, if not all, old HP spectrum analyzers say X-Rays generated in this intsr are sufficiently screened Why do they generate x-rays at all. The HP 8565E I am looking at can only measure up to 50 GHz so I have trouble seeing why it would have such…
Brian Carlton
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4
votes
0 answers

High voltage power supply polarity for X-ray tube application

High voltage power supplies (HVPS) in the range 100 to 200 kV are used for working with X-ray tube. Some HVPS produce negative output voltage or even bipolar output including negative and positive voltage. I want to know which type of HVPS is proper…
Sam
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4
votes
2 answers

X-ray back-projection for conversion to hard-field magnetic induction tomography?

This is a question about hard-field back-projection as used in x-ray tomography, but applied to magnetic induction tomography (MIT). Al-Zeibak and Saunders (A feasibility study of in vivo electromagnetic imaging, 1993) have shown that an x-ray…
Brendan Darrer
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2
votes
1 answer

How do failure modes of high voltage cables play out?

I fix x-ray equipment, and here is the connector that fits into the x-ray tube. It carries up to 150kV, and maybe 500mA during exposure. My boss tells me if I see some black carbon deposit on the sides of the 'candlesticks', that means the x-ray…
PJazz
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2
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2 answers

Can a dental X-Ray machine be used to look at PCB?

I have an old castaway PCB that was being thrown out. I am having a hard time figuring out where all the traces go. Could a dental X-ray device be used to scan it (thus making it easier to follow the traces?) I am not worried about getting…
BarrowWight
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1
vote
1 answer

Zero Voltage switching

I am having confusion regarding the understanding of Zero Voltage switching as given in the website. What does the ZVS do in the circuit shown below? Does it produce a sine wave or it just makes the generated square wave much smooth? What is the…
kam1212
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1
vote
0 answers

Would it be possible to power an X-Ray tube using a Marx generator?

To the best of my knowledge most X-Ray tubes are powered by a smaller voltage running through a large transformer to step it up into the magnitude of 10-100 KV. This larger voltage is then pulsed through the tube to be picked up by some sensor/film.…
mwhite22
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1
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How could this capacitor have been damaged?

During testing, a capacitor was found to cause an intermittent failure - going short circuit when heated. The capacitor style is a through hole, radial lead, CECC rated 68nF MLCC. Our supplier makes these in small batches, so we assume they buy in…
MIL-SPEC
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0
votes
1 answer

PWM generation for the transformer using SG3524N

I was looking at one of the schematics of the filament board of an x-ray machine, where they had used the SG3524N for the generation of PWM and MOSFETs for the generation of an alternating voltage for the filament transformer. The filament…
kam1212
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0
votes
1 answer

Resonance inverters and pulsation frequency

I was reading one of the patents for the x-ray generator when I found a resonance inverter attached in front of the switching circuit. I understood how the system works but one statement written is kind of confusing for me: "The pulsation frequency…
kam1212
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0
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1 answer

Thermionic emission

I am doing the calculation for the "finding the temperature of filament". I tried with: Resistance (R=V/I) Resistivity (ρ = R·L/A) Temperature (T = (ρ-ρ0/ρ0-δ) + T0) Here ρ0, δ and T0 are for reference resistivity, temperature coefficient, and…
Hardik Chaudhary
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0
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1 answer

How can i measure a transformer primary inductance with a load on the secondary?

I have an x-ray closed transformer and I only can access to the primary terminals. I want to measure the inductance of the primary and to know how this loaded secondary influences it.
Gabriel Quiroga
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0
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1 answer

Photodiode Direction Sensitivity

I'm trying to create a setup where I would have xrays emitted through a photodiode (the non sensitive side). I do not want the photodiode to detect these xrays going through it, only the xrays which return back to the source. My question is then,…
ajnauleau
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0
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2 answers

What technique (ultrasound/infrared) should I use to detect seeds inside a fruit?

This fruit is simplistic as there is a thin skin surrounding it. Inside it is a tiny ball of liquid and that is where the dense seed forms. The is seed much more denser in comparison with the liquid and the skin, you could almost neglect their…
Bezal-el
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