Centralv From a purely haphazard basis, your demo is the most condensed illustration of what some people babble endlessly to describe...maybe by circumnavigation. Thanks for the magnifying glass!

"[He] was able to build this in a cave! With a box of scraps!"

Caution is always advised when doing experiments with glass and electricity, but consider the work Geissler, Crookes, Thompson did with more fragile aparatus than a jam jar. The 'Mason' jar (like the one used) is intended for canning and that is done in a vacuum. OK, not outer space, but a vacuum none the less. Tossing around a CRT will end badly not because of the vacuum, but due to the fragile nature of the tube's neck. For the jam jar, the maximum force on the outside would be 1 atmosphere pressure--15 PSI--and I wonder if that would be enough to shatter the glass due to careful handling.

@HansHeidman

8 жыл бұрын

+ResearchAdvantage It's pretty mind blowing how long ago so many amazing discoveries in physics were made considering the lack of ideal materials and equipment they were working with at the time! What did you take into account when calculating the pressure and force / where did you find those numbers if someone else had already done the math? I'm interested in how much stronger of a vacuum a mason jar with a straight neck, instead of the bottle-necked one that +Lindsay Wilson used in this experiment, could handle - although I really do NOT advise anyone to attempt this with thin glass either!

@ResearchAdvantage

8 жыл бұрын

+Hans Heidmann There is not much pressure inside inside the 'Jam Jar' when the vacuum pump extracts enough air to enable the plasma to be generated. Assume the jar is empty for this calculation: internal pressure equal zero. Where I live the 'easy to remember' value for atmospheric pressure is 15 pounds per square inch. Check Wikipedia for more in-depth (no pun intended) discussion. So you have 15 PSI on the outside and zero PSI on the inside, so the net force on the jar is 15 PSI all around. A cylindrical container will resist that force on the sides and the force on the top (when in the 'plasma' position) will be supported by the walls of the cylinder. That leaves the portion of the jar that is resting on the rubber gasket. Because the 'mouth' of the jar is resting on the gasket, all that is resisting the force from the side at that point is the shape of the opening (round) and the friction between the glass and the rubber. Most people can 'squeeze' more than 15 PSI, but I don't know of any stories of jam jars being crushed in an effort to get the lid off. The risk under high vacuum comes from the shape of the container (round is better) and the glass (thick is better). I have personal experience with a polycarbonate plastic vacuum chamber decompressing--but not breaking--due to the lip sliding on the rubber gasket and letting the air in with a bang. A thick lip on the jar is essential. have a look at the bell-jars from the 19th and early 20th centuries for an example. Oh, and there should be no obvious flaws in the glass. The 'bottle-neck' is a good thing as it resists that sideways force on the lip of the jar. If you are trying to go for an ultra high vacuum, the loose-footed 'bell jar' on a base design will not be as safe as a proper vacuum chamber--either a sphere or cylinder with solid bolted-on end caps. Look on eBay for some examples.

you mad man, I wouldn't be standing anywhere near that thing if I were you.

I would be very careful with high voltage and a vacuum! You can produce high amounts of x-rays and irradiate yourself. Most electron tubes run on only 12kv if you get anywhere close to 40kv the x-rays can go through just about anything!

@science1324

7 жыл бұрын

Very cool video though!

@MM-hq2bd

7 жыл бұрын

science1324 ?

@lazyh-online4839

7 жыл бұрын

Since he is using just 1kv, I doubt there will be any issues, however it is a good idea to be aware of such risks just in case.

@eaxnml

7 жыл бұрын

Dont pass 3keV... you plays with 1-10 eV

@user-fg9wy2kj3r

7 жыл бұрын

วิธีเปลี่ยนกระจกลอ10ล้อ

Thank you for your video! Had no idea it could go desktop, so will stop chasing exotic parts.

This looks like it might make a good UV light source.

A high voltage as high as 1kV on a simple system, it might be very dangerous.

much simpler design. glad I saw this video 😁

Blue suggest positive charge rather then negative charge particles?

@imajeenyus42

Жыл бұрын

I don't know what you mean. A plasma comprises both electrons (negative) and ions (positive). Light is emitted when these combine, and the colour of light depends on the gas type, pressure, current etc.

Great now add your gold target and sputter coat some samples for SEM! Great job! Bleed in some argon!

Mechanical pumps are not enough to sputter any reactive metals. Only silver, gold, platinul..etc.. will work. You will get deposition but most of that will be oxides. Just adding argon will not remove the contaminants, it will jusy inchrease the pressure. Still, i like your external magnet setup, it's good for heat disipation.

Amazing! What pressure is needed?

@imajeenyus42

Жыл бұрын

Thanks! Something below around 100mTorr is pretty good.

Great video. Looking to understand the magnetron circuit a little more - and how the containment and plasma control takes place. Can you recommend a source?

Hi there We also made this set up but we couldnt be successful. Our vacuum level is 3*10^-2 mbar and we apply aprox. 1000V but all we can see is just random sparks. We couldnt ignite the plasma. we cleaned our copper target (like shining) but still no success. Do you have any suggestions why cant make it?

@EMREeeeK42

4 жыл бұрын

Hi Mehmet can, Did you find out what the problem was? Because 3*10^-2 mbar vacuum pressure looks OK for a sputter operation. Maybe distance between anode and cathode was too big. Was your vacuum chamber provided with Argon? A possible cause of random sparks could be that you sucked to much molecules out of the chamer. u need to feed a continuous plasma with enough gas molecules like Argon. I am looking for a feedback from you. Kind regards, Emre

What is causing the plasma discharge? If the jar is evacuated of all air, should there be nothing at all visible? Especially considering the relatively "low" voltage you used (approx. 1 kV @ A thought... if you introduced a filament or a heated cathode, your "jam jar" could function as a crude, half-wave vacuum rectifier tube if you had used AC on the filament and a positive DC (?) on the plate/anode. All in all, a very interesting demonstration, indeed.

@imajeenyus42

7 жыл бұрын

Erzahler Firstly, the jar can never be evacuated of ALL air. There's no such thing as a perfect vacuum. Here, the pressure was probably around a few Torr (atmospheric pressure is 760 Torr. Neon signs, for example, are typically around 10 Torr.) This is a relatively rough vacuum and has no problem carrying current. The pressure is determined by the type & speed of the pump ( in this case a two-stage rotary) and whether there's any leaks. The open-circuit voltage of my power supply is 1200V which is easily enough to strike the discharge (the voltage drops one current starts flowing). The pressure here is way too high to try and use it as an electron tube, with a tungsten filament etc. You might get some measurable effect, but generally you want a pressure down to 1E-5 Torr. This can only be achieved with a diffusion or turbo molecular pump.

@Erzahler

7 жыл бұрын

+Lindsay Wilson: Thank you for the explanation, Lindsay. I don't pretend to understand ALL of it, but some of it I do. Thank you.

What an amazing experiment, oh yeah what if we wrapped a copper wire around the jar, like solenoid form and then we electrify the copper wire, wouldn't that also produce a magnetic field? Is it okay to video this experiment? Thanks..

Did you make a light bulb

@imajeenyus42

Жыл бұрын

This is not a light bulb.

Do you have a schematic for this setup? I'd like to do something similar for an engineering project. I think the only thing I don't have is the vacuum pump.

Can you please! Make a video on how to create your Magnetron step by step?

Even crazy magnetron sputter system.

It's an arc reactor

Lindsay Wilson if you don't mind I would appreciate if you would discuss some of the components and precautions with me. I am trying to make my own Magnetron plasma but I would like to talk about some of the issues with the project and how to fix them such as: cementing the top of the jar (the aluminum block, next to the anode terminal) with cobalt to prevent degradation in order to allow the discharge to occur for an extended period of time, without damaging the anode terminal as well as the vacuum connection. Another problem that I would like to fix is reducing the sputtering rate of the discharge during use. If you would be able to help me out, your insight would be greatly appreciated.

@imajeenyus42

7 жыл бұрын

Hi - not sure what you're meaning by cementing the anode with "cobalt"? Epoxy should be fine, as long as the anode is cooled. Remember that most of the glue is on the outside of the chamber - if you can make the anode a close fit through the hole drilled in the glass, there will be hardly any epoxy exposed to the vacuum. As for reducing sputtering, best try using a different material for the cathode. Have a look at this table of relative sputtering rates: www.semicore.com/reference/sputtering-yields-reference. Metals like titanium, niobium, tantalum have rates about half that of aluminium. Titanium sheet is relatively easy to come by as well. Hope that helps!

So, does this have a use other than looking cool?

@imajeenyus42

Жыл бұрын

The magnetron arrangement is widely used in sputtering guns for depositing thin layers of material in vacuum. I was mainly interested in seeing how the presence of the magnets affects the shape/distribution of plasma.

The aether is in the jar.

becarefull with photon and hazardouz lethal voltages....

So if i understud right, you used: a 1.000 volt DC corrent supply, a jar for vacum and a megnet under the jar. What is the grey cilinder in the top of the jar ? Only a connector or something else ? What happen if i try to use A.C. corrent with a lot of more volts ? ...sorry too much questions :P The first interest me very much thanks ;)

@imajeenyus42

7 жыл бұрын

Firstly, please see the webpage at imajeenyus.com/vacuum/20140114_magnetron_plasma/index.shtml - it may answer some of your questions. Power supply - in my case, I had already built a special current-LIMITED supply, for use with gas discharges. Because of the negative resistance of the discharge, you need to have some form of current limiting - either a simple resistor (easy, but inefficient) or a fancy switchmode arrangement, which I used. The no-load output voltage is 1000V, but when delivering 300mA, it drops to a few hundred volts or whatever the discharge requires. The "grey cylinder" is simply a chunk of aluminium to make both electrical and gas connections - see website for more details. If you tried to use AC current, firstly the voltage wouldn't change much (as it's mostly determined by the gas pressure, electrode spacing etc), and second you'd get sputtering from both electrodes which isn't desirable. The upper electrode would also heat up as well.

Is it possible to buy this plasma setup with Langmuir probe?

@imajeenyus42

Жыл бұрын

Are you serious? You see some guy's lashup hobby project in his garage from 9 years ago and expect to be able to buy it?!?

what are the values of the pump? I guess you are writing the metal ethics on it?

Is the plasma formed from what little oxygen remains?

@imajeenyus42

7 жыл бұрын

The gas mixture, even when down to rough vacuum, is still approximately a 80/20 nitrogen/oxygen ratio like at atmospheric pressure (the pumping speeds for the two gases are similar), so most of the emission is coming from nitrogen. (It's very hard to photograph colors correctly, but a nitrogen discharge is much more blue/purple than oxygen)

@GaryMcKinnonUFO

7 жыл бұрын

***** Thanks Lindsay. I've seen other videos that show the plasma rotating in the magnetic field, which is quite thought-provoking.

How did you connect the vacuum pipe to jam jar and also what kind of vacuum pump did you use

@imajeenyus42

Жыл бұрын

Machined aluminium block glued into the jar, then a push-fit pneumatic fitting screwed into it.

Fantastically simple setup. How did you know the jam jar would withstand the vac before using it? Seems a little risky to just test with any garden variety jar. Looks like you're using regular atmospheric gas. Have you tried any pure feed gasses? (argon, Methane, Helium, oxygen) What kind of substrates are you depositing on?

@imajeenyus42

9 жыл бұрын

Peter Romo Hi! It is a little risky ;-) I had used jamjars years ago for simple vacuum chambers, and they all seemed to stand up pretty well, so I was reasonably confident of it being safe. I'm actually using argon - the other gases I have (co2, oxygen, air) all need a higher operating voltage which my supply wasn't capable of putting out. Besides argon is generally the best for trying to sputter stuff. Note that I never actually sputtered anything with this - that would require some cooling of the cathode, because it does heat up very quickly.

does the deposition can be done ??

Nice Video! Link to website fills-in the gaps in what was missing in the video. Making the aluminum block and attaching everything to that is much better than drilling multiple holes in the jar. I know how difficult it is to film this type of video with only one person to hold the camera and do the work. It was easier for me when I got tripod. On a safety note, 200 mA is a lethal amount of current. I would be a little more conscious of getting a shock from the equipment. I got a little concerned when you handled the energized jar to demonstrate the ring dissolving when the magnetic field is removed. I would have setup the demo so that I would move the magnet instead so as not to handle the jar with 1KV. Those jumpers are also not rated for 1KV so the insulation might break down and be ineffective. Those look like they might have 600V insulation.

@imajeenyus42

10 жыл бұрын

I agree, moving the jar around by hand perhaps isn't the safest of techniques. However, 1kV won't jump far, perhaps 0.5 to 1mm at most, and I was careful to keep my hand well away from the electrode on top. I'm not being complacent, but I've a pretty decent feeling for where it's safe to handle things. It's a far cry from working with tens of kV, where you have to really think about where a discharge could jump to, often in the oddest of places! Regarding the jumper leads, I honestly don't know what to believe about voltage ratings. That thick red wire is actually rated at 1kV, but I've used it in a pinch at 20kV and haven't seen breakdown of the insulation itself. Likewise, the thinner red and black wires (connected to the meters) are only something like 300V rating, but again I've had no problems with breakdown. I guess that the voltage rating applied to the wire is extremely conservative - obviously for "proper" use you'd need cable with the proper rating, but for hobbyist stuff this is fine. I once checked to see what the breakdown voltage of the coating on enamelled coper wire was - wrapped two pieces of enamelled wire together and increased the voltage between them until it broke down. Worked out at about 5kV for a single layer of insulation, pretty impressive!

@emf4kv

10 жыл бұрын

I have worked with 4KV enameled wire that tested to failure at 21KV. To pass the test it only had to go to 20KV, but we took it to failure just to see how much margin we had. Good to know you are thinking about safety makes your audience feel better. :)

@sweetguy19762

9 жыл бұрын

***** if you wanted to sputter what would you do diffrent?

@imajeenyus42

9 жыл бұрын

Owen Chase The main things would be cooling and the power supply. And perhaps using rare-earth magnets instead of ferrite. A lot of heat is deposited in the cathode during operation and the only effective way to remove this is by water-cooling the rear. It's a bit tricky to get a water feed which is also vacuum tight and electrically isolated from the surroundings, but possible. On my webpage (link in description) there's links to three of Ben Krasnow's videos where he describes his sputtering gun, the magnet assembly etc. I can't actually remember if he was using water cooling, but I think he was. Cheers, Lindsay.

@sweetguy19762

9 жыл бұрын

I was going to use it to make partial reflective mirror for co2 laser do you know how I would make it partial reflective without making it 100% reflective I thought a co2 laser will burn glass and I thought glass was the best thing to you to sputter a copper coating on?

WOW!!! this is amazing..great work Lindsay Wilson.. but then y dint u include cavities over here??? or did I miss to see it??? Good work nywyws..

@imajeenyus42

9 жыл бұрын

If you're thinking on the resonant cavities inside a magnetron tube (for producing microwaves), then no, that's a completely different thing. Cavities are only required if you want to produce microwave radiation. In the sputtering setup, the term "magnetron" simply reflects the fact that there are electrons travelling in a spiral path in a magnetic field. It's a general term for this sort of thing.

@suryapandian4508

9 жыл бұрын

Thanks a lot for clearing the doubt..nd SPECTACULAR VIDEO buddy... I have learnt these stuff in theory and have never seen one, it was too abstract then, watching this was amazing... all that I learnt in theory makes sense now.. thanks a lot for sharing this over you tube... nd thnks again for spending time clearing my doubt... :) :) Have happy times ahead!!! :) :) :D

Can you try this same with spining magnet?

Лучшая конструкция ввода и ..

The power of the sun is in your hands.

@mahu1203

5 жыл бұрын

After having the electric power!

what is your power supply circuit? Is it AC or DC?

@imajeenyus42

Жыл бұрын

DC - see the link in the description for more info

Excellent. The only doubt is in the part of magnet. Can you please describe me what is done with the magnet?

@ezramatan5233

4 жыл бұрын

Plasma is weird, when atoms are ionized they start to behave like a magnet. The ring shape he used as a magnet develops a field were the atoms are carried and their trajectory is bent. He left a space were the small magnet and were the larger magnet is attached. This leaves a pocket between the two fields. In this pocket the plasma gets trapped leaving a ring of plasma. Edit: this method is used to make sputtering machines.

@sillyjoke

2 жыл бұрын

@@ezramatan5233 Thats actually not was is happening. The magnet creates a inhomogeneous magnetic field. Electrons on such a field feel a force pushing them towards the position where the density of the magnetic field lines is lowest. So the electrons end up in the ring shaped region where field lines are least dense and predominantly ionize atoms there.

Just an idea, use the same principles to create an Arc Reactor replica. Obviously for prop purposes. But it'd look so close to real, it'd be awesome. If you do, make an instructable on how to!

@CUBETechie

8 жыл бұрын

yes a glas torus would be nice

thx 4 subscribing bro! great channel you have here!

Question is, would this do anything for energy release?

@imajeenyus42

6 жыл бұрын

Umm.....energy release from what? Not sure what you mean.

If you had a ball magnet (like those neodymium magnets bracelets) and it would sit inside the jar, what would happen, if anything?

@imajeenyus42

10 жыл бұрын

Not really sure - I'd guess that the plasma would get trapped around the "equator"

@aserta

10 жыл бұрын

***** Interesting. Thanks.

@ryanwiggins5402

8 жыл бұрын

🤔 It would most likely heat up ♨️ and loose it magnetic polarity after a little while 🚫

Shouldn't that give off more x-rays than you want in your hand? Or is there not enough power?

@imajeenyus42

8 жыл бұрын

+Yextus It's only running at less than 1kV. Generally, X-rays only start to become a concern at above 20-30kV or so.

@ryanwiggins5402

8 жыл бұрын

+Lindsay Wilson will it give off microwave radiation at 1kv?

@imajeenyus42

8 жыл бұрын

No. To produce microwaves you need to use a cavity magnetron and some means of coupling the electric field of the oscillating electrons out of the device. A simple DC magnetron discharge like this will not produce microwaves.

Could you explain me why did you use also a vacuum?

@ezramatan5233

4 жыл бұрын

Because if you don't use a vacuum then the plasma would simply not occur. There are too many atoms floating around for the process to happen.

Could someone explain to me how you create a plasma within essentially a Cathode Ray Tube? Where's the gas? Plasma is created when a gas is ionized, how is this working? Or am I just confused?

@imajeenyus42

7 жыл бұрын

A cathode ray tube uses much lower pressures (to allow the electron beam to flow without striking gas molecules) - here though, I'm running at maybe 100mTorr, where there is still plenty of gas to get ionised.

@imajeenyus42

7 жыл бұрын

"plenty of gas" - I mean, there's plenty of gas around as regards conducting electricity, it's still a very low pressure compared with atmospheric! Atmospheric pressure is 760Torr, so 100mTorr is only about 0.01% of atmospheric.

@futurealarms121

7 жыл бұрын

Lindsay Wilson Oh, I thought it was a 100% vacuum. That makes much more sense. Thank you.

@imajeenyus42

7 жыл бұрын

Yeah, it's deceptive! Even at extremely low vacuums, there's still a surprisingly large number of molecules around. For example, at 1E-12hPa (roughly the same in Torr), there's still 26,000 molecules per cm^3: www.pfeiffer-vacuum.com/en/know-how/introduction-to-vacuum-technology/fundamentals/molecular-number-density/

@futurealarms121

7 жыл бұрын

Lindsay Wilson Science is certainly an amazing thing.

What voltage/amperage required? Can plasma ball be used?

@imajeenyus42

3 жыл бұрын

Details of voltage/current are described both in the video and the link in the description. I suggest you watch the video. No, a plasma ball supply cannot be used as it does not have a high enough current output.

@sauroman1

3 жыл бұрын

@@imajeenyus42 Maybe current can be boosted? Those big ones output 5kV. Just looking for practical power supply

Nice and helpfull video. Can you please tell me how strong magnets you used and where can I buy magnet and metal assembly? Please.

@imajeenyus42

2 жыл бұрын

I don't know the strength of the magnet, sorry. The magnet I used was one of a pair out a microwave oven magnetron.

@nityanandadas5575

2 жыл бұрын

@@imajeenyus42 So, will it work if I use the magnet from a single microwave oven, or need more magnets, please. Sir.

@nityanandadas5575

2 жыл бұрын

@@imajeenyus42 I have no idea about which microwave oven magnet will work. Please suggest me to start with.

@imajeenyus42

2 жыл бұрын

@@nityanandadas5575 One ring magnet. Any microwave oven, they all use magnetrons.

@nityanandadas5575

2 жыл бұрын

@@imajeenyus42 Thanks a lot.

Hey Lindsay, what pump are you using? and where did you get your vacuum components from? Thanks

@imajeenyus42

7 жыл бұрын

The pump is a small two-stage rotary pump, from Alcatel. Not sure about the pumping speed unfortunately - on something like this, one of those air conditioning pumps would probably do. As for vacuum components, if you mean the blue piping and fittings, that's all just standard 6mm push-fit pneumatic stuff.

@hosspishyar

7 жыл бұрын

Thanks for the reply Lindsay, Ive got a robinair vacuum pump (15115) but I'm not able to achieve such uniformly distributed plasma in the jar I'm using...its generally arcs...do you know what the problem may be? p.s. I can email you a video for clarification if you want

@hosspishyar

7 жыл бұрын

also, is this the sum you're using? www.ebay.com/itm/ALCATEL-2033-DUAL-STAGE-ROTARY-VANE-VACUUM-PUMP-WITH-GE-AC-MOTOR-5K45SG1071B/400263633008?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D41375%26meid%3D52b037f50bf84a929b39ff8d094301eb%26pid%3D100011%26rk%3D5%26rkt%3D6%26sd%3D322490779146

@imajeenyus42

7 жыл бұрын

Hi, I checked my pump - it's an Alcatel 2002BB model. There's actually a listing on EBay for one at the moment so you can get an idea of size: www.ebay.co.uk/itm/ALCATEL-2002BB-DUAL-STAGE-ROTARY-VANE-VACUUM-PUMP-/272684833040. It's quite small, 1.5CFM with a 100W motor, so similar to the Robinair pump EXCEPT that it's a dual-stage pump. However, the single-stage Robinair SHOULD be able to bring the pressure low enough. If you're seeing arcing, that suggests the pressure is too high, for example caused by a leak. Maybe if you could send me a photo/video of your setup I might be able to spot something. What sort of seals are you using for the jar etc?

@hosspishyar

7 жыл бұрын

awesome, can you send me your email? (msg me if you prefer)

Use d c Portable car batteries as power source... Plenty of ampres

@imajeenyus42

6 ай бұрын

Can you explain why? I can't wait to hear.

Can it be used from magnetic speker??

@imajeenyus42

5 жыл бұрын

I'm assuming you mean a _plasma_ speaker, since all conventional moving-coil loudspeakers are essentially magnetic. No, because the discharge is occurring at reduced pressure inside a vacuum chamber, not in the open atmosphere.

@mohammadpakdaman7411

5 жыл бұрын

hi.tank.s no... my mean is (tinylittlelife.org/?p=232) ..magnet from speker

Instead can you just run a coil around the Plasma chamber

@imajeenyus42

4 жыл бұрын

If I had an RF power supply, which I don't.

你好 圆形磁铁内部那个圆的 也是一块磁铁吗？？

@imajeenyus42

4 ай бұрын

No, it's just a piece of steel. Please see my webpage for details imajeenyus.com/vacuum/20140114_magnetron_plasma/index.shtml

@imajeenyus42

4 ай бұрын

@@__xiaifei Antigravity? 😂😂😂😂😂😂😂😂😂😂😂

@__xiaifei

4 ай бұрын

@@imajeenyus42 是的 我做的是非真空等离子，目前在搞反重力 你很明白朋友。。牛

Can I ask you something. I made my own vacuum chamber and High Voltage Power Supply but the plasma cant fill all the chamber like yours. It's just a plasma ray which cant fill all my vacuum chamber.Are there any problems with my HV Power Supply ? :D. Please help me

@imajeenyus42

8 жыл бұрын

+Hà Tú Anh Sounds like the pressure is nowhere near low enough - i.e. you have a leak somewhere or your vacuum pump isn't powerful enough. You need to get down to a few Torr pressure before the discharge fills the chamber completely.

@hatuanh1802

8 жыл бұрын

thank for you reply. :D. I get it down to under the -760 Torr pressure. I dont know if it's low enough ??. Please help me :). can i have your mail so i can show you mine :)

@imajeenyus42

8 жыл бұрын

+Hà Tú Anh Yes, a photo would help a lot. My email is linsday@imajeenyus.com if you want to send one over.

@hatuanh1802

8 жыл бұрын

thank you so much. i have alread sent one over. :). please help me to firgure the problems

@hatuanh1802

8 жыл бұрын

+Lindsay Wilson please let me know when you receive my mail

Nicely.

so is this like a small tokamak ?

@imajeenyus42

6 жыл бұрын

Well....not really; this does use a magnetic field to confine the plasma to a localised area, but this is still in contact with the cathode. A Tokamak uses a combination of two magnetic fields to levitate the plasma in a torus shape, free from contact with its surroundings.

@DolezalPetr

6 жыл бұрын

Lindsay Wilson But it is still very cool

You need argon in the chamber to actually sputter anything

@imajeenyus42

4 жыл бұрын

Not necessarily. Argon will give a higher-quality coating, faster deposition rate, and avoid any chemical reaction with the deposited material, but sputtering can be done using air as well. C.L. Stong's "Amateur Scientist" article from way back describes it - www.jstor.org/stable/24926153?seq=1

The Arc reactor!

how much to build this

@imajeenyus42

2 жыл бұрын

I have no idea

@pro.empire

4 күн бұрын

@@imajeenyus42 what the plasma temperature

@imajeenyus42

4 күн бұрын

@@pro.empire I have no idea

How hot is magnetron plasma?

@imajeenyus42

7 жыл бұрын

At a totally wild guess, few thousand K. But it depends hugely on electron/ion ratio, density, pressure etc.....

Why is it blue? Has anything to do with Cherenkov radiation, just curious?

@imajeenyus42

9 жыл бұрын

Nope, just visible light emission from the glow discharge (electron/ion recombination -> visible light). The color depends on the gas present in the chamber - air is generally purple/blue, argon would be blue, helium pinkish, and neon red. Cerenkov radiation is when an energetic particle enters a medium in which it's travelling faster than the speed of light IN THAT MEDIUM. For example, in water, the speed of light is only about 0.75 of that in a vacuum, and it's possible for some particles produced by nuclear reactions to travel faster than this (nothing can travel faster than the speed of light in a vacuum, remember). The result is like a sonic boom, but for light ;-) Hence the pictures of reactor pools glowing blue.

@soulhunter0

9 жыл бұрын

***** You use a vaccum pump to partially remove the air inside the jar right?

@imajeenyus42

9 жыл бұрын

soulhunter0 Yes - not quite sure what pressure, probably under a Torr. More details on my page at imajeenyus.com/vacuum/20140114_magnetron_plasma/index.shtml

@soulhunter0

9 жыл бұрын

***** thanks

Is this how they maybe built pyramides or other preserves buildings from the old times?

@imajeenyus42

3 жыл бұрын

I need a laugh this morning, so I'm going to indulge you - how exactly do you think the pyramids were built?

turn it up to 100KV and bask in the majesty

Can you make this into a gun?.

@imajeenyus42

2 жыл бұрын

Huh? No.

Awesome!

good

You where join the blue pipe

@ezramatan5233

4 жыл бұрын

r/hadastroke

super

was this filmed with a potato???

xrays

@imajeenyus42

9 жыл бұрын

***** Uh, no. Not at the voltages used here (300V - 1kV); they're far too low.

Damn I get off on this!

Here's an idea. Place the vac. pump away from the work area. You know , the NOISE.

Sorry, non-scientist here. What the hell am I looking at?

@smoolae5474

7 жыл бұрын

Magic inside vacuum!

X-rays!!!!!!!

@imajeenyus42

3 жыл бұрын

Eh, no. Voltage is far, far too low to produce any X-rays.

@JamesCutlervk2tim

3 жыл бұрын

@@imajeenyus42 Just as well - I thought about that after I commented, but never mind

wow f------k yea

@imajeenyus42

7 жыл бұрын

I didn't know fuck had so many letters in it ;-)

So... this would be an awesome video IF you would stop whispering and/or mumbling into the camera like a scared child.

@imajeenyus42

10 жыл бұрын

Oh, snarky. You try doing it when you have a bad cold, and a vacuum pump is clattering away in the background.

@RhetteLawe

10 жыл бұрын

I really liked how you set it up, but you're not presenting it in a way that lends it's self to praise. You're hardly the worst offender on KZread, but if you're going to spend the time to machine the parts and all that, make sure that small things aren't working against you.

@imajeenyus42

10 жыл бұрын

RhetteLawe Aright, point taken ;-)

Could you explain me why did you use also a vacuum?

@imajeenyus42

8 жыл бұрын

Sorry, don't quite understand - a discharge such as this will only occur in a vacuum.

@sleeptyper

8 жыл бұрын

Without vacuum there is too much air for the voltage to jump across the electrodes and start a plasma discharge - practically a short circuit. Vacuum is needed to bring the amount of air and thus electrical breakdown voltage low enough for plasma to ignite.

@davidecannavacciuolo4661

8 жыл бұрын

+sleeptyper thanks a lot man

@science1324

7 жыл бұрын

+sleeptyper That would be seen as an open circuit, not a short circuit. You are spot on on the rest of your comment!

@sleeptyper

7 жыл бұрын

science1324 I said that the vacuum is needed to start a short circuit - practically a plasma discharge. :)