Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [ionization]

15 questions
26
votes
6 answers

Why do high-voltage transformers need oil?

Someone told me that high-voltage transformers need oil because it prevents arcing. However, in terms of dielectric breakdown, isn't air the strongest? I remember from classes in college that as the dielectric constant increases, the breakdown…
PJazz
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3 answers

I have 5 kV available to create a spark. Is limiting the current to 500 µA as simple as putting a 10 MΩ resistor in series?

Haven't worked with high voltage much before, I'm trying to use a spark gap to ionize some gas. I have 5 kV on one side, and a plate attached to ground on the other. The 5 kV will switch on as needed, but I want to make sure the current doesn't…
Shredder
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7
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1 answer

How can I rectify up to 85 kV?

I've recently gotten into eletrochemistry, and I found out that if you break through \$\epsilon_{0}\$ with a high enough voltage you can ionize various gasses. I've already wound a 1:1250 EE core that I plan to operate at 350 kHz on a 25 V supply…
user14828
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3
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5 answers

Open circuit ground multiplexing?

I am experimenting with electrospray ionization. The setup has a 4kV power supply connected to an electrode that is separated from a return lug (or ground plate) via an air gap, followed by an inline pico-ammeter and finally ground. The way this…
keystoneclimber
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1 answer

Are "ionizing" hair dryers any different from the regular ones?

I've been shopping for hair dryers and in all malls I've been to the salespeople explained how the "ionizing" hair dryers are better than the ones without that function, because it makes your hair less frizzy. I have been able to talk four of about…
user1306322
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2 answers

What does "highest ionizing energy deposition" mean?

I am looking for how to compute the thickness of shielding materials and have found the following research: ISNPS Technical Report ISNPS-1-2013 Tai and El-Genk.doc (unm.edu) The report is mentions the „highest ionizing energy deposition." I have no…
Anna Koroleva
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How to calculate the pressure and velocity of an ionised gas that is being impelled with magnetic pressure

Calculating the velocity and pressure of an ionised gas based on magnetic pressure and magnetic force. Questions: Based on magnetic pressure expressed on an ionised gas, how do I calculate the current flow in amperes? The magnetic field is…
Milton L. Rowlands
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3 answers

Current leaks at 500 VDC

Background: I have a small soldered joint on a 500 VDC (0.1 A) lead that's exposed to air. The edges of the joint are fairly ridged and have a few significant edges. In the higher voltage range (40 kV) these edges can potentially cause a loss in…
user154046
0
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0 answers

Transformer-insulated flame ionization detector. How to improve response? Triode, messure current safety, ignition fires

I am trying to do a isolate flame ionization detector with a transformer ignition. But, when I put it on the frame, nothing change.. (0.2VAC) I put a amplifier (10 teraohms impedance) to read the signal too, but it is the same of the osciloscope. If…
Alexandre Bensi
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0
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1 answer

How to reduce 30 amps to 5

I recently bought a Transformer so that I can make an ionic lifter but it has a max 30 amp output and I’m sure that is way too much for what I need plus Since I have this plugged straight into the wall I’ll definitely need an ac to dc rectifier…
MasterJ
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3 answers

Amplifying an ionization current with an op amp

My observation: Previously at my work I was assigned a project in which I needed to amplify an AC signal from a piezoelectric electric sensor. I simply made an inverted op amp circuit to accomplish this. I now have been assigned a project involving…
J Maklen
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1 answer

Why are ionization smoke detectors bad at detecting smoldering fires?

I have been doing some research on the differences between ionization and photoelectric smoke detectors, and main differences in their capabilities, seems to be their ability to detect different kinds of smoke. I read that ionization detectors are…
Eames
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1 answer

Does my electric clearing field actually make ions?

I am using an electric clearing field of 15v/10cm (~150V/m) to remove ions from a test chamber, however I'm wondering to what extent the localisation of the field's reference voltage plays a role. simulate this circuit – Schematic created using…
Matt Stedman
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1 answer

Radio Noise from Storm

I drove through a Wyoming thunderstorm today. Just for fun, I set my AM car radio to the top end of the AM broadcast band where there was no station audible. Sure enough, I heard the lightning crashes, some of which were visible. However,…
richard1941
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Negative air ionizer with a electric net of 3X 230V AC

I want to make the following negative air ionizer but the following instrucable uses a net of 230V AC + N. My question is : If I make the following circuit but power it with the two phases of a 3x230V AC (thus 230V AC) (source:…
AXANO
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