I see you like to test different corona discharges. So I can suggest you an experiment: a magnetohydrodynamic drive that propels an aircraft, that’s a corona discharge which interacts with magnetic field. So the concept is as following. Install two corona emitter electrodes in front and on the back of your craft; supply the electrodes with co-linear field coils (or permanent magnets) in order to stretch two coronas as far as possible in the opposite directions so this way you’ll have wider semi rings of air current sideways. On the left and right sides of the craft you should have electromagnetic coils or permanent magnets to push down both semi rings of air current; if the front electrode is positive and back is negative then the left side must be a north magnetic pole whereas the right side is south magnetic pole. According to Flemings’s left hand rule the air will be propelled downwards thus pushing the craft up. This concept seems more advantageous than so called “ionocraft” because the latter consumes a lion share of its potential payload with a big array of corona electrodes whereas the concept that I just offered uses vast air flux cross section without need to stretch any grand electrode arrays; it basically makes a “virtual ventilator” of much bigger size than the craft itself. I have subscribed to your channel. It would be great pleasure to see my idea tested. Thanks in advance.
Very interesting video! I have a small solid state tesla coil and I noticed that the frequency of the input signal also influences the stability of flare discharges. For example at around 16.5 kHz I get very stable flare discharges and a strong ozone smell. Is there a connection between the pulse frequency and how the discharges behave?
Thanks! I already have a video about my voltage multiplier, which provides high voltage in this case! However, I indeed am planning to make a video about my ZVS driver and flyback transformer, which power the voltage multiplier itself.
EXCELLENT! I was going to try making a sheet-discharge between parallel tungsten wires using large-value series resistors. Too expensive. A series-gap is just the thing. This unstable glow-mode versus arc-mode (versus "pseudospark,") is identical to ...iron chokes used on neon signs! Also, series-ballasts on HID lamps, or the 100K resistor on NE-2 neon pilot lights. Engineering: add a series-component which creates a "load line" curve of proper slope. This only allows a single operating-point on the wide gap's V-I curve. (Or in your case, the VI curve of the acorn nut spark gap has only one point in common with the VI curve of the wide-gap discharge.) Ideally, spark-discharges can never happen. But ballast resistors are terrible, since they dissipate large wattage. Everyone instead uses HV AC and series inductors or rarely, capacitors. But with a quench-gap, we can now use DC, with no resistors to ruin our high-watts output value! Genius! Need to try multiple chain of 0.1 -mm gaps (three acorn nuts, or maybe ten.) IDEA: also try an AC version, either with wattage-limited primary, or with an EHT series capacitor of the correct value, perhaps a variable cap immersed in oil. Nikola Tesla also did this, placing spark-gaps in the HV side, rather than current-liminting on the 120VAC side. I'm convinced that this produces all sorts of weird effects: stuff nobody has ever encountered, since instead they all use conventional low-volt current limiting. In other words, adding a spark gap as a "ballast" to the HV side, this may well be one of Nikola Tesla's major lost secrets. Nobody would discover this, because "EHT series-ballast" is hard to do, and everyone assumes that a simple current-limiter on the low-volts side will give identical results. PS on ebay, search for "copiers" "tungsten" and you'll find all sorts of extremely thin wire which is designed for producing ultra-smooth corona discharge. 0.001-inch tungsten wire in photocopiers, it's called "coronatron wire." I only discovered this because I bought a big box of copier-repair parts, with a spool of that strange wire.
Thanks for the clear methodical explanation to go along with your demonstration, and good luck in the upcoming academic year, although I suspect you won't need it :D
Well not going into details, it can leave permanent lung damage and in the worst case compeletly destroy one's lungs, ofc for the latter the ozone concentration needs to be very high. By specific units, ozone is more dangerous than such known gases as chlorine or cyan. That's why I'm ventilating the room after each run, and the runs by themselves are relatively short. Frankly though, I use such precautions only with really powerful high yield ozone generating setups, namely this one and dielectric barrier discharge one (video coming .. somewhen). Single streamer corona probably won't do much harm.
Yes, as I said, the small amount probably won't hurt you. The thing is, really dangerous concentrations of ozone disable your smell sensation, so you won't smell it at all :) Don't worry, if it would've hurt you, you'd notice that by coughing and other stuff.
came across flare discharge on accident before learning about it and was really interested in seeing what it actually was. Was using an ac flyback made by RCA connected to a voltage tripler for an old solid state television.
Have you tried manipulating the atmoshere to see the effect on breakdown? Air temp, gas composition etc? Very hot dry days is the only times ive seen corona discharge on hf ignition tig welders. Outside of that its always spark.
How could someone thumb this down? Obviously someone who’s extremely jealous! Brilliant job there buddy explaining the corona discharge, I myself is a extremely big fan of high voltage. Love it. And I love the smell of ozone lol 👍👍👍👍👍THUMBS UP👍👍👍👍👍
I wonder if I could create fast ion wind by combining a flare corona discharge with kind of a small version of a linear particle accelerator (linear tube with electrodes with fast-switching alternating polarities with gaps in between). Of course, a multistage ion wind generator could alternatively also increase the total wind speed of the neutral molecules (this has already been done in several publications), but I wonder if separating ion creation and successive ion acceleration could be more energy efficient, because neutralizing ions on the collector side, only to create new ions on the emitter side of the next stage seems like kind of a waste (and has more aerodynamic drag with all those emitters and collectors). Apart from quickly and repetitively disconnecting the collector side of the dielectric field before the bulk of the ions is neutralized, for the accelerator to work I'd need to be able to very quickly switch on and off the high-voltage sources in the accelerator in order to supply the electrodes with the correct polarities. Maybe you have an idea how this could be achieved? Switching the high-voltage directly on the output side seems challenging because components like mosfet transistors are usually not rated for the kV range, apart from heat losses and leakage currents. In other words: it seems more doable if the input side of the high-voltage generator is switched (fine-tuned timing e.g. via an Arduino). On the other hand, there would be a problem if the high-voltage generator would need time to charge up. Is there any good high-voltage source that almost instantly (=microseconds) delivers the high output voltage whenever the input voltage is turned on?
Interesting idea! Yes, there are such sources and they are in fact quite common. Pulse transformer (PT) is what you need. Primary - IGBT switch, 1 kV, 200 A, secondary - 20 kV, 10 A. Output voltage can be applied with as low as 100 ns time lag. Another way is mosfet-based Marx generator or linear transformer. These machines also have very low time lag. Basicaly any single-shot pulsed scheme (without inverters).
Hey, amazing demonstration! I was wondering if this would produce more ions per watt and area than say, a typical flyback transformer? Might be good for ion lifters/propulsion
Good thinking! Idk about efficiency per unit, but this pulsed approach allows you to postpone the breakdown (so to speak) and create more corona as you do so. My little knowledge on lifters tells me that usually their corona intensity is limited by breakdown between the foil and the wire. Short pulse periodic corona might solve that problem to some extent. I know that with pulses of 40-50 ns and voltages of 100-1000 kV corona can be created in giant meter-scale branches without breakdown. Pulse repetition frequency of about 1 kHz allows to push 20-30 kW into that corona. Such high parameters are made possible by SOS technology (semiconductor opening switch), if you want to look it up.
@@Vidduley Amazing! Thanks for the reply, I'll need to check that out. If it's possible to increase the power over a distance without breakdown significantly then using some electro or perm magnets for MHD thrust becomes much more of a viable option as you can get a lot more charge per unit area than conventional lifters. NASA messured 20N/kW but I ran some numbers and you'd need a conventional lifter the size of a football pitch to lift a person and the power supply (in theory) So biggest challenge is increasing the thrust per unit area which this looks to be able to do. Purely electric batteries couldn't do it until about 1000w/kg but hybrid fuel cell or gas/electric would work really well. Maybe in 20 years when battery tech is 2x or 3x what it is now, it could be done purely electric.
Hey Vidduley, I'm looking to integrate a spark gap into my flyback + ZVS circuit and I was wondering where you would recommend placing it? I assume the air cathode/anode acts as the resistor in order to charge the spark gap? Or do you add an induction there?
Sharp points concentrate electric field, so it can locally exceed critical ionization field threshold. This allows us to create corona in the first place, otherwise we would get only sparks.
Vidduley, Put a sharp point at the bottom. Use a circuit to monitor the current and set a maximum. Trying to use hands and eyes to control a process that moves at nearly the speed of light is a losing battle. Measure the FFT of the current, and solve for the modulation to have the path what you want. Are you aiming for a smooth cylindrical channel with a particular beam power density or current density? What is the voltage? What is the current? Basic measurements will speed your development process. Guessing and doing things by eye and hand is basically impossible, which is why you are spending years getting to this point. I like what you are doing, but you can be more efficient. Richard Collins, The Internet Foundation
Mr. Collins, thank you for your interesting suggestions under this and my other videos! The goal of my videos is to teach and show, not to create some new invention or product etc. One could say it's quite the contrary, most of the stuff I show is 80+ years old technology. It just needs more coverage on the internet, in my opinion, hence why I make my videos P.S. Don't get me wrong, I am also a strong advocate for correct measurements in high voltage hobbyist community. Most of the time it just isn't what I'm trying to convey
That is a TEA N2 laser with the widest discharge gap I have ever seen. Do you see laser output when you place two sheet of white paper with some distance at the left and right end of your saw blade (to make the UV laser output visible)?
Heh, that's an interesting take on that setup! I haven't tried what you describe, although I do believe that I would somehow notice the lasing if it would be present here. I think this thing wouldn't work as TEA N2 laser because the pumping isn't fast and uniform (it takes streamers about 100 ns to bridge that gap). And I believe you need the medium to be excited in less than 2 ns, to effectively pump that kind of laser, that's what amateur Blumlein line construstion of such laser is all about. Furthermore, there isn't a preferred gain path, so the light amplification must be really low, if it occurs at all. So I personally don't think it would work as a laser. But again, thank you for a really interesting take, it has never even occured to me :)
@@Vidduley My referral to two capacitors intended to point at what should be required to complete the setup. N2 lasers do not need mirrors to work. To concentrate most of the output to one side, it is enough to make the gap a little wider on the (main) output side. What seems to happen there: N2 gets electrically pumped and starts to emit photons on the narrow end. As more N2 is already excited at that point in time, a coherent light pulse develops along the discharge gap.
Yeah, I sort of am familiar with that concept. Ghe coherence cannot be obtained in such lasers because who said the N2 starts emitting photons specifically in one point that starts the generation? :) Chances are that it emits these "trigger" photons somewhat uniformly throughout the volume, and each of them gets amplified. So the output is more like a UV flashlight concentrated to a beam, but who cares about coherence anyway, am I right. The main thing I was referring to was that the time scales here are far from optimal. At atmospheric pressure, the lower laser level gets full and shuts down lasing in about 2 ns. So ideally your pumping circuit should be done by that time. That can be achieved in non-inductive compact setup. But in my bulky setup with long wires the parasitic inductances and discharge processes limit time scales to 100 ns at best (so maybe more than that). So, no efficient pumping here, hence no lasing. That's all just from my immediate thoughts on the subject. What do you think?
@@Vidduley I also think that the capacitors have to be constructed in some way close to the discharge gap. Good thing is at those voltages that pretty anything is a capacitor. The hard part is, to prevent the capacitor from transforming into a spark gap.... :) Best thing might be to sleep a night over it, go to the toilet and develop a simple and ingenious idea how to do it with the things at hand. :) The standard layered kitchen foil - plastic foil way is out of question at that voltages I guess... :) I'll tell you, if something useful comes to my mind!
По идее должна идеально подойти. Я пробовал обрабатывать полиэтилен, полипропилен для склеивания, и к обработанной поверхности клей прилипал намертво. Главное здесь низкая ионная температура разряда, чтобы не пожечь пластик, и высокая скорость образования озона и радикалов для разрыва полимерных цепей на поверхности. Данный разряд, да и импульсно-периодическая корона вообще, как раз сочетает в себе такие свойства.
@@Vidduley тогда я хочу сделать такое. У Вас для склеивания полиэтилена использовалась установка с полотном, которая делает равномерное "пламя" коронный разряд?
@@Vidduley Какое напряжение и частота? Какова в итоге мощность? Как я понимаю, дно это один электрод, а полотно второй? Схема устройства самодельная, или использовались готовые блоки типа строчника от телевизора, трансформатора из микроволновки и прочее?
Тут на установку подано постоянное напряжение порядка 100 кВ с самодельного умножителя напряжения. Вся суть в разряднике, подключенном последовательно с основным промежутком, на напряжение 10-20 кВ. Полимеры я обрабатывал для пробы, локально, короной с электрода-иглы, но по идее и с полотна будет работать. Если накрыть диэлектриком нижнюю пластину, то из-за барьерного эффекта полотно придется подвинуть поближе к пластине. Вообще советую поискать материалы по запросу "линейный коронный факельный разряд", по-русски разряд в такой конфигурации так называется. Не хочу случайно ввести в заблуждение, я эту установку делал для демонстрационных целей, так что могут возникнуть и какие-нибудь непредвиденные трудности в вашем конкретном применении. Ну и напряжение всё-таки высокое, не очень безопасно. А так делайте, экспериментируйте.
I don`t know how effective it is at sanitizing but ozone is very effective at removing bad smells :) Just make sure you do not breath it as it is not good for lungs.
@@leomadero562 Just air it out after ozone treatment and do not stay in room while it is filled with ozone :) My AC and dehumidifier has ozone making option to clean out bad smells and it works for that .
At the time of making of this video I was studying for a bachelor's degree in electronics, majoring in physical electronics. I graduated in 2021 and at the moment I'm studying for a master's degree in the same major. Basically our program is a mix of courses concerning the physics of gas discharges, plasma technology, and generation and applications of powerful electrical pulses. Also, back then I was employed part-time in a state research institute, particularly in the laboratory which is conducting research in the field of solid-state pulsed power. Now I work there full-time, with my main field of work relating to computational electromagnetics and propagation of ultra-wideband picosecond electrical pulses.
Dear friend, what is your native language ? Спрашиваю потому, что интересуюсь высоковольтными устройствами, а на русском мне общаться проще. Видео понравилось.
@@Vidduley Да, произношение некоторых букв, особенно R. Но мне речь более понятна. Также хорошо понимал английский японцев - построение предложений у них похоже на наше. А что за схема ВВ генератора применена в Вашем видео ? Ток, судя по всему значительный, диоды в умножителе 2CL2FM? Я их еще не использовал, а ставил 2CL77 , слабоваты, недавно сгорел умножитель залитый эпоксидкой. Какую схему посоветуете для осаждения дыма в трубе ?
Да, здесь умножитель 10 каскадов на 2CL2FM, ещё ни один диод из оригинальных у меня не сгорел, до этого заказывал из Китая, те горели как спички. Надежнее их не найти, насколько я знаю, только если собирать из одиночных диодов столбы. Про печной дым я если честно не слышал.
@@Vidduley Благодарю за ответ. По поводу диодов из Китая не советуете ? А я нашел на Али 2CL2FM по цене чуть меньше 700 рублей за 10 штук. В чипе и дипе эти диоды вовсе не cheap, а более 240 рублей за штуку. Столбы можно собирать самому, например из UF4007, но нужно еще выравнивающие резисторы (или необязательно?). Про осаждение дыма: я имел ввиду коаксиально в трубе коронирующий электрод, а труба - осадительный электрод. У Вас в качестве генератора что используется ? Я ставил двухтактный генератор, собранный по полумостовой схеме, потом транс и умножитель, получал дуги до 12 см, но транзисторы выходили из строя видимо от обратного напряжения.
Я с Али чуть ли не все лоты наверное перепробовал с 2CL2FM, все горело) Оригиналы брал в терраэлектронике, там они по 180 вроде бы за штуку, потом нашел магазин e-components - там по 120 с чем-то, и оттуда и оттуда диоды не сгорали, да и по корпусу идентичны оригиналам. По UF4007 - да, можно, набирал столбы, работали; насколько мне известно, если набрать с запасом по напряжению процентов на 20, то можно и без выравнивающих цепей. Преобразователь у меня по схеме ZVS (Mazilli driver), просто и удобно; можете посмотреть мое последнее видео, подробно про него там рассказал.
