As an undergraduate physics student and a fan of Back to The Future, I feel obligated to tell you that I think you're the best TH-camr ever. Really awesome videos!
Thanks. The phosphor used in oscilloscopes is "slow" -- meaning that a burst of electrons will cause many milliseconds of light. The P47 phosphor used in SEMs gives up most of its light in tens of nanoseconds. This is necessary for a beam that scans across the specimen in a reasonable amount of time.
Here I am rewatching every single video again from the beginning. Making good progress and remembering why this is my only all time favorite binge channel and person in existence
Search for "paschen curve" to see what distance/pressure is required for breakdown. The biggest problem is that vacuum quality at one point in the chamber may not be the same as vacuum quality at some other point in the chamber. Breakdown can happen even when the gauge reads 10e-6 if there is a leak or virtual leak causing localized higher pressure.
The production on these videos is so lovably cheesy. As someone about to go into an engineering degree, I really appreciate these videos. Great balance of light humour, enthusiasm and hard science.
Recently discovered your videos just under a week and a half ago. Given your working (and extensive) knowledge of chemistry, electricity, fabrication, machinery, physics, thermodynamics, and mathematics, I would not be surprised if you actually, one day, just stumbled upon the necessary components and properties to make a working flux capacitor. Video Intro: "Hey guys! So while I was baking a new batch of cookies, I accidentally discovered the properties that make time travel possible. Who'd have thought?" Really enjoy your videos, BTW. I never thought it possible to create a plasma cleaner small enough to fit within the space of a desk inside your home or shop. It got me going on a Bell Jar tangent -- started looking up prices, sizes, and what-not -- not to mention these different videos have generated some potential ideas for homemade science experiments of my own at some future point (with safety as the top priority, of course). Keep making more videos. They're both fun and fascinating to watch. Thanks for taking the time to make them.
What an excellent explanation of the boxen involved in creating am EM in your basement! Thanks a lot. I will look in on the rest of your vids for guidance. Jeff Thompson
Very interesting. I did 40 years in EM both TEM and SEM. The first EM I used was an AEI EM 6B.No automatic valves ! you had to be careful. Don't Don't forget to get an ultrasonic cleaner Cheers Robin
that is really simple, I have most parts, those high voltage power units could be home made and the whole thing could be made much smaller, interesting project
You have one at your college. In fact they might even have an electron microscope, if they have any sort of physics or chemistry department, and if you have a convincing good reason to use it.
Building all the power supplies from scratch shouldn't be too difficult. The problem is getting all the vacuum gear. I can't even get prices for diffusion pumps. Are they really *that* uncommon?
Something I'd be curious about here is potential radiation exposure. Obviously with the copper tubing, you're okay for most of the beam path, but when you're trying to adjust things, I'd be a little scared.
wow was not expecting that, you are such an inspiration. Can I request a project? I love rocket engines, and something that I've been wanting to do is build a liquid propellant engine, a small one. Do you think you could consider making one and documenting it.
How many electron gun assemblies would you say that your power supplies can run, do you think the four power supplies for the electron acceleration could power 12 assemblies?
So it's not possible at all to make it work with a flyback transformer? I mean if there is something you can do to make it work, it could bring the price down by a good amount.
Hey guy, just say CONGRATULATIONS!! Who the f.u.c.k is gonna get stoned or try pot? What you do is really psychodelic for a brain... Plz, give us more coooool stuff like that. We both enjoy that! And...Delorean is...a must-have in such a tech guy like you, so...do not care comments. I also saw The Goonies...jeje We've grown with these kinda films! I'm SUBSCRIBED
If you're watching this in 2022 or later, note that these prices have *wildly* changed. Don't even bother looking at eBay -- it's just full of vultures who want to try and make money off of hobbyists like us. Don't support these guys. Look on other websites, look at junkyards, check university sales, ham radio swap meets, etc. Talk to fellow hobbyists and don't jump at the first offers you find unless you *know* it's a good deal.
One man's junk is another man's scanning electron microscope!
As an undergraduate physics student and a fan of Back to The Future, I feel obligated to tell you that I think you're the best TH-camr ever. Really awesome videos!
You built an electron microscope AND you have a delorean? Are you god?!
yeah
Thanks. The phosphor used in oscilloscopes is "slow" -- meaning that a burst of electrons will cause many milliseconds of light. The P47 phosphor used in SEMs gives up most of its light in tens of nanoseconds. This is necessary for a beam that scans across the specimen in a reasonable amount of time.
phosphorescence vs fluorescence?
Can I pay you to build me one?
you are a genius dude. Wished I could work in a project with you. You are certainly inspiring
Here I am rewatching every single video again from the beginning. Making good progress and remembering why this is my only all time favorite binge channel and person in existence
Search for "paschen curve" to see what distance/pressure is required for breakdown. The biggest problem is that vacuum quality at one point in the chamber may not be the same as vacuum quality at some other point in the chamber. Breakdown can happen even when the gauge reads 10e-6 if there is a leak or virtual leak causing localized higher pressure.
The production on these videos is so lovably cheesy. As someone about to go into an engineering degree, I really appreciate these videos. Great balance of light humour, enthusiasm and hard science.
You know no matter who you are you’d want ben as a lifelong best friend who you’d know is always a reliably cool and kind dude no matter what
Recently discovered your videos just under a week and a half ago. Given your working (and extensive) knowledge of chemistry, electricity, fabrication, machinery, physics, thermodynamics, and mathematics, I would not be surprised if you actually, one day, just stumbled upon the necessary components and properties to make a working flux capacitor.
Video Intro: "Hey guys! So while I was baking a new batch of cookies, I accidentally discovered the properties that make time travel possible. Who'd have thought?"
Really enjoy your videos, BTW. I never thought it possible to create a plasma cleaner small enough to fit within the space of a desk inside your home or shop. It got me going on a Bell Jar tangent -- started looking up prices, sizes, and what-not -- not to mention these different videos have generated some potential ideas for homemade science experiments of my own at some future point (with safety as the top priority, of course).
Keep making more videos. They're both fun and fascinating to watch. Thanks for taking the time to make them.
You are awesome!. Your dedication and perseverance are a real inspiration.
I'm a simple man, when I see a DeLorean I hit like lol. Thank you for all your hard work and dedication, and the awesome content that you produce.
This is really interesting stuff. It's not something I'll ever build, but boy, it's still fun to listen to.
What an excellent explanation of the boxen involved in creating am EM in your basement! Thanks a lot. I will look in on the rest of your vids for guidance.
Jeff Thompson
Very interesting. I did 40 years in EM both TEM and SEM. The first EM I used was an AEI EM 6B.No automatic valves ! you had to be careful.
Don't
Don't forget to get an ultrasonic cleaner Cheers Robin
Man you are awesome , I feel the nerd spirit is strong in you.
are you working on a flux capacitor?
What else would he have a DeLorean for?
Ben, this is very impressive. I have a question, don't you need ultra-high vacuum to avoid discharge at 30KV?
Yes, he did. Try turning on annotations, especially when he said he'll add it up in post...
I actually laughed out loud when I saw the DeLorean. I wish we were mates.
buy a commercial sem and you'll blow at least half a mil...
Thats very fascinating!! well done!!!
that is really simple, I have most parts, those high voltage power units could be home made and the whole thing could be made much smaller, interesting project
did you built it ?
Yeah did you?
@@platinumvulture1122 yes, I used a vacuum system we have at work
@@DolezalPetr make a video on it
@@platinumvulture1122 it is long scrapped, like a year ago, I am surprised people are commenting under this comment
Any plans of making Transmission Electron microscope (TEM)?
So figure about $3,500 to $4,000 total build cost. Not bad though - and yes a digital version would be interesting too!
Can you use a crt as a electron gun? What would you have to change.
Discovery Science should let you do at least webclips for them. Watching this is very entertaining.
Man... I wish I had a shop like this guy... but I'm a broke-ass college kid
+Aditya C Try dumpster diving. People toss perfectly good stuff, because the stuff is engineered to purposely fail.
Unfortunately there are no shops, or even small garages in dumpsters, no property rights either. Believe me! I checked a lot of dumpsters.
Hey, Aditya to Aditya, I can relate.
You have one at your college.
In fact they might even have an electron microscope, if they have any sort of physics or chemistry department, and if you have a convincing good reason to use it.
What microphone are you using? It sounds great!
Building all the power supplies from scratch shouldn't be too difficult. The problem is getting all the vacuum gear. I can't even get prices for diffusion pumps. Are they really *that* uncommon?
Something I'd be curious about here is potential radiation exposure. Obviously with the copper tubing, you're okay for most of the beam path, but when you're trying to adjust things, I'd be a little scared.
Awesome video
wow was not expecting that, you are such an inspiration. Can I request a project?
I love rocket engines, and something that I've been wanting to do is build a liquid propellant engine, a small one. Do you think you could consider making one and documenting it.
Impossible work!
Is it possible to use the frontscreen of an old oscilloscope instead of a phosphor disc?
He mentioned that it would probably make it slower.
really great video, its just excellent, thanks
u r really creative man!
@bkraz333 Thanx for the info! From the reviews I found on youtube, it is actually a pretty decent mic under $20!
Thanks a lot dude
can you make an updated version. im trying to show my GF Atoms.
cool project, inspiring,what's the maximum magnification ?:)
What about modifying the electron microscope to allow building things atom by atom?
How many electron gun assemblies would you say that your power supplies can run, do you think the four power supplies for the electron acceleration could power 12 assemblies?
Best car in the universe!
OMG I loved your channel before but I never knew you had a delorean, that is amazing you are awesome lol
So it's not possible at all to make it work with a flyback transformer? I mean if there is something you can do to make it work, it could bring the price down by a good amount.
Very nice
Can you post a DIY on using a Delorean to power it?
SO CHEAP!!! i was expecting at least 5k!
Thanks.I am from Somalia. I want to buy a cheap SEM,so I can get?
Make videos on SMPS
No way, Ben has a delorean!!!
is the detector a camera of some sort
Clemo Del La Chemist Yes but a very very sensitive one with only one Pixel resolution.
Great thx you
Could you make electron microscope to see covid 19 virus? Cost? Sale?
You're like a science McGeiver...
Can you build me a warp drive out of an old iTouch?
You have a DeLorean? Damn... :O @ Afrotechmods. He his Omnipresent... shhhh! :)
lol, the intro!
Now to figure out how to be able to make one for only a couple 100 bucks or less.
Hey guy, just say CONGRATULATIONS!! Who the f.u.c.k is gonna get stoned or try pot? What you do is really psychodelic for a brain... Plz, give us more coooool stuff like that. We both enjoy that!
And...Delorean is...a must-have in such a tech guy like you, so...do not care comments. I also saw The Goonies...jeje We've grown with these kinda films!
I'm SUBSCRIBED
@Afrotechmods he's the human equivalent to optimus prime !
Would an electron gun from an old TV work? Lol
+Aaron Collen Yes, very well and last a very, very long time.
@Afrotechmods Hahahaha he's the human equivalent to optimus prime !
You didn't total your list.....and your delorean is way off topic ..........
sorry for the crudeness of this picture, i didn't have time to draw it to scale or to paint it
"I broke it in a really stupid way"
dropped it on the floor?
I'm guessing he used his butt.
An electron gun from an old CRT TV saves you about 400$.
he made this SEM in order to work on his flux capacitor.....:P
If you're watching this in 2022 or later, note that these prices have *wildly* changed. Don't even bother looking at eBay -- it's just full of vultures who want to try and make money off of hobbyists like us. Don't support these guys. Look on other websites, look at junkyards, check university sales, ham radio swap meets, etc. Talk to fellow hobbyists and don't jump at the first offers you find unless you *know* it's a good deal.
putting here costs for a electron microscope which never worked..........ou will loose all that money
Oh God great Ride!! I didn't know you're in SF!!
Home electron microscope cost $1485 -I'm surprised I could not find this comment.
pff photomultipliers
50 bux
try 10 euro new
I bet $ 1,000 that you are not married and have no kids...am I wrong?
De Lorean. Rubbish. All Show No Go.
Who needs go when you have show though?
where we're going we don't need go!
True....but wouldn't it be fun to drop a capable LS3 engine in the bay of a delorean & actually hitt 88mph? 🤗
Enough with the LS's...
Next time a gas chromatographer. And a detector ofcourse.