Magnetrons require a microwave oven/resonance chamber to build up enough heat by the wave going over the same area again and again. I've tried (not to burn anyone's house down though)
+fo shizzle Is not that much. You can have 10 amps at 250 volts in main and get 12000 volts at 0.2 amps.... It will be 2.5 kw/h. 5 Kw is 1 euro in Romania. My last electricity bill (for 2 months) was 200 Kw - 50 euro. So you can play 2 hours non-stop with a step up transformer as said and pay 1 euro....
The counts are averaged over time. It takes time for the counts to decrease in the detector. However in reality x-rays appear and disappear as soon as the device is switched on or off t. Physicist
You sir are certifiably mad! Definitely a subscriber for life! I wish I lived close enough to visit but not quite in the flat next door. Your videos allow me to see all the experiments I would enjoy myself less the expense and potential of acquiring an angry bout of tackle cancer. Keep up the great work.
Cool to experiment, BUT A geiger counter doesn't detect X-Rays!! Totally different frequency. There is a reason why radiographers use fluorescing screens.. because they DO detect x-rays -- big time!! Yes I was an x-ray engineer. FFS get yourself some eye protection as you are probably already well on the way to cataracts.. And by the way you need 100K to 150KV, 200K is too much, the x-rays will just pass through everything. Medical x-ray tubes use an aluminium sheet to protect you from the low 50KV stuff which is seriously damaging to eyes and skin. :-)
Yup the job of a geiger counter is to detect radiation. Although, x-rays are radiation, the amount of radiation produced by x-ray CRT is not a significant amount to cause cancer. But can cause cancer in the long run. But its very true that the geiger counter cannot detect x rays. if that large tube produced x rays, the geiger counter would have started beeping WHILE the high voltage was on. NOT after.
Ryan Haquim the reason there is a delay between the tube being on and the Geiger counter reading is due to the slow response of this particular Geiger counter.
Geiger counters do detect X-rays because they are ionising and you can check this on google yourself. Inside the counter the geiger-muller tube contains a gas is ionised by the radiation and this produces an electric current. The main reason why fluorescing screens are used is because you can generate an image from them. The large tube probably did produce X-rays, but the counter was positioned too far from the tube to detect much of it. A lot of the newer tubes are impregnated with lead so this could also be reason.
That was wild I have to admit bringing these old things back to life... Watching the electronic arc. Another you for a great Holloween display.. with the arc jumping was really interesting ...
Getting there. Electrons can't move at c (they have mass, which would cause all sorts of physics to break), but electric fields can. This is arguably the most counterintuitive thing in basic physics, but while electrons can't move at c, electric fields can. The best way to think of this is as if the electrons can see each other. When one electron sees the other start moving, then the observing electron starts moving. (contd)
This may seem a bit late, but for anyone who is watching this in the future, in AUSTRALIA the legal dose for an un-licenced person is 25.0uSv/h with an allowance for up to 1mSv per year. And yes I am a licenced Industrial Radiography Technician, I'm not just spitting numbers out the top of my head.
i spent a day in Chernobyl and pripyat in 2008. the geiger counter read 5000 (normal background .5-10) and i wasnt worried. being in a room with them wouldnt worry me either. long term exposure is what you need to worry about if i remember correctly...
It's great that you are actually doing what most of us likeminded people have at some time thought about...👍🏼😂 the fact your doing it is actually saving lives...😂😂😂👍🏼👍🏼👍🏼👍🏼
9.70 u/sv might seem high but that's about how high the radiation is when you fly in an airplane at cruising altitude. It's really not dangerous at all even over long periods.
I suspect you're correct. I am not familiar with this particular Gm counter and whether it can differentiate between beta particles and X-rays. 200 kV isn't really high enough for X-rays.
One thing to be aware of is the radiation pattern from overdriving vacuum tubes (like you are) can be extremely uneven. As such, you may get artificially low readings because the geiger counter is not in a hot-spot of the beam. There are some cool photos around the internet of people measuring the emission patters of various vacuum tubes with phosphorescent screen, and long exposure photography.
The old colour crt in TVs had X-ray protection circuit as the tube contained a metal shadow mask and a 25kv final anode voltage. If the final anode voltage is too high the electrons have too much energy and hitting the shadow mask creates X-rays. It's not the vacuum causing the X-rays rather the high energy electrons hitting metal.
P.S.: Here in Big Sur California the background count averages 14 to 15 CPM... I see it's about the same there in your place... seems to be like all over the Earth... unless one lives in Pripyat or Fukushima or somewhere.... it's a little higher in some places.
congratulations, your awesome choice of topics, combined with a wonderful, no bullshylkl I'mt approach to themm has one you a lifetime subscriber, and a big pile of likes.
Great vid! I've wondered this for years when watching you with those HV transformers :) the state of matter vid springs to mind.. I wonder if a bare CCD sensor could "view" xrays?
I wonder how high it would've read had it been for a whole minute? I have the same Geiger counter and it displays the average of the last minute, meaning the intensity of the x-rays were actually much higher than what the reading was....then again, the reading is in uSv/h, so a minute is only a 60th of that.
You should apply to the school as a science teacher...and use this video as part of your portfolio 😂😂...I'd love to be a fly on the wall in that interview and see their faces...😂😂😂😂😂👍🏼👍🏼👍🏼👍🏼👍🏼👍🏼👍🏼
You should get a pressurized integrating ion chamber it will detected the lower energy xrays and the pulses as well. So that geiger counter would undercount exposures.
While I would agree with most of the comments on here about how this is likely a malfunction in the Geiger, it's worth taking into account that the Geiger was measuring steady higher readings of X-rays which each coincided with an increase in voltage to each tesla coil on each attempt. Malfunctions, or spontaneous readings in the Geiger due to large emf would show up as jumps or spikes and would likely have inconclusive readings rather then the steady output variables which can be seen. The only way to rule out that emf was indeed causing the reading would be to measure its strength and place the meter further away. But really though, chances are X-rays were indeed produced. Be safe out there ! Leaving the room did little to help you btw... Unless your walls are thick concrete or some sort of reflective metal. Given the reading on the Geiger was relatively low and the period you were exposed wasn't that long you should be okay... But perhaps a insulated faraday cage around your next test, set it up to encase your tesla coils, put the Geiger inside with your camera in a non reflective insulator so you can avoid further harming your cells in future experiments.
100 µSv/h It is necessary to take protective measures, e.g. to shelter indoors 30 µSv/h The dose rate measured at a distance of one metre of a patient that has undergone isotope treatment. When the dose rate is less than 30 µSv/h, the patient can be discharged. 10 µSv/h Some protective measures are needed, e.g. avoiding being outdoors unnecessarily.
X-rays are created when an accelerated electron slams into a solid target at an extreme velocity. The very high voltage accelerates the electrons across the empty vacuum before slamming into a solid object. This is called "Bremsstrahlung".
Instead of buying a geiger counter you can also download a dosimeter app for your smartphone which uses the camera chip as a radiation detector. These counters are even able to detect pulsating radiation which other electronic dosimeters can't. Even the expensive ones. A lot of new and upcoming electronic personal dosimeters will be based on this technology.
If X rays were generated for real, camera would go crazy and crash. Also efficiency is only about 1% so you have to put quite a lot of power to get something visible.
Since the electrons can't see each other faster than the speed of light, the movement propagates at the speed of light. This is how electric fields can propagate at c even though electrons can't move that fast. Electrons simply cannot reach the speed of light, since they have finite mass, and particles with mass can't reach c, so you can actually have a stationary electron (though it's really, really hard). Essentially, voltage sets the speed of the electrons. The more voltage, the (contd.)
Ok... here is a question for you. In my youth... about 1975 or so... we took a color picture tube and placed it on a metal plate (ground plane), then connected the output of a 15,000v 60mA neon transformer to the side port... with a chain suspended from insulators about 3 inches (7.6cm) above the tube, and connected to the other side of the neon transformer. (Basically a Leyden jar from hell) We fed it with 120vac run through diodes to produce pulsed DC. It would charge up a bit, then make lightning. Just how stupid were we on that? Didn't think about X-Rays... I was 15 at the time.
Maybe you can get xrays if you use heavy metal with high fusion point as anode and cathode, such as tungsten, iridium or molibdenium, and voltages around 100kV. That's what is used in xray tubes. A typical chest xray uses 120kV and 20mA.
at 5:03 is about what you would expect from a typical CT scan. X rays only travel in a straight line though, so the readings would possibly be lower in other parts of the room.
