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Ionizing Electron
Добавлен 28 сен 2021
Cool Home Made Cathode Ray Tube
A test of a cheaply made CRT. The tube is simply glued together with epoxy, yet it is able to reach pressures low enough for cold discharge not occurring and a filament becomes a requirement for the tube to operate.
Просмотров: 3 588
Have you tried irradiating KCl? If so, what colour does it become?
Is it coated?
What kind model use to eject electron
How did eletron travel in vaccum
That one scintillating very strongly.❤
what pump are you using, and how many microns are you operating at
x ray 😂😂😂😂 get out with disharging danger
Zns kaha hai
Why is it glowing blue?
When charges gone near metal tube the zinc sulphide layer has a reflection that's why there is reflection of blue light!
واااو مذهل 😮😮😮😮❤
What did you use to power this?
X-ray machine 💀💀💀💀
Wow. How many R/h do tou estumate? :0
More more more!!!
I saw it in the anime Dr stone season 3
BASED
**=** I remember when I tried some time magnet in a cathodic TV, now I dont haves cathodic TV, oh man, I can't try it again... But it make impressive color change!
very cool, what did you use to seal the kf flange to the glass flask?
Super epoxy for steel and other metal surfaces. (Works pretty well on glass too)
What is the high voltage you use for anode?what is the luminofor on your screen you use and where i find this substance?how did you deposit the ZnS layer on the glass?
The HV was probably around 15 kV. The phosphor is ZnS:Cu. The phosphor was mixed with acetone and a small drop of glue which was poured into the CRT, stirred around and left to dry.
Sweet
Does it produce X-rays?
At the voltage used in this demonstration is not high enough for any detectable x-rays to make it out of the tube.
Nice
What is the voltage and what is the material of the scintillator? Thanks.
It's running at about 20 kV. I do not remember what type of plastic scintillator this was.
Nice focused beam. What is the construction of the electron gun?
The filament part is a broken small tungsten lamp and the anode is a small tube of brass.
Pretty cool man!
What level of vacuum are you pulling here? Is this with only a rotary vane pump?
I do not have an exact value but it does seem to reach a pressure close to the ultimate vacuum of the pump. That being 2.25 mTorr. Yes this is just a two staged rotary vane pump
ooooo it's phosphorescing. sexy
With a green color at that, which is interesting since x-rays cause a blue emission even within the same energy range.
Looks interesting
Can you explain what exactly happened? And how?
Electrons in the salt absorb energy from the electrons (and x-rays) bombarding the salt. Some of these now excited electrons in the salt get's stuck in what is called voids. This causes the salt to reflect light differently as it will no longer absorb and emit the same wavelengths of light.
@@ionizingelectron4773 That's, the process was not complete, that made it get stuck in void. What if the process continue, what else will happen to the salt?
@@arioriabdulrafiu8773 If the salt is kept at room temperature, nothing more will happen other than the color change. If it is in a very strong beam which causes it to heat up, it will get a purple color. If one goes further it will heat up to the point were the color is lost and it turns white again.
@@ionizingelectron4773 Thanks very much
@@ionizingelectron4773 What's the name of this effect? I guess some chlorine/sodium reactions are involved. Was chlorine produced during this reaction? Thanks.
How did it change colour
Electros in the KBr salt get exited as they are exposed to the electron beam. Some of these exited electrons get stuck in so called voids within the salt. The electrons which get stuck will slowly de-excite back to their normal state, emitting the excess energy in the form of blue light.
@@ionizingelectron4773 Thanks, you made it clear.
I have watched the video and can verify that the homemade cathode ray tube featured therein is in fact actually cool.
How did you seal the anode through the glass? What type of vacuum pump(s) are you using?
The seal is made with some general use "super epoxy" bought from the local hardware store. The pump is a two staged rotary-vane pump capable of producing a ultimate vacuum of 2.25 mTorr (0.3Pa).
Surprising that its cathodoluminescence is actually the same color as the visible light reflection color
Indeed. Another interesting observation that could not be seen here is the quartz spots on it glowing red under a higher energy electron beam. Never observed quartz fluorece in such a way and it makes me wonder what impurity might be within in and if it's related to the lapis.
@@ionizingelectron4773 What are you using to seal the cathode into the tube? It looks like some sort of epoxy? Also are you using a second-stage vacuum pump like a diffusion pump or just a rotary vane pump? I'm trying to make my own cathode ray tube and really struggling to achieve sufficient vacuum pressures.
@@jacobb7608 Yes I'm using epoxy to seal the tube. It is some general use super epoxy from a normal hardware store. The pump is only a two staged rotary vane pump with an ultimate vacuum of 2.25 mTorr. Important things to keep in mind when constructing CRTs is the distance between the electrodes, their shape and the size. These factors control the current being pulled, which in case of too much current can cause mayor voltage drops. Though the most important factor is of course the pressure.
👌👌
What was the beamcurrent and do the walls get hot ?
4.88mA and yes they do get hot though running pulsed lets it cool off before overheating
color centers 😍🤗 plz sprinkle on a hotplate in the dark
Oh right, I forgot to test that, thanks for reminding me!
@@ionizingelectron4773 I would love to see the spectrum of the cathodoluminescence
Under led lagahua hay blue colour Ka 😂😂😂 chutia
How it will be done please help