DL122 - Hitachi S800 Scanning Electron Microscope Teardown Part 1

In this video i quickly walk around a Hitachi S800 Electron Microscope from 1988 and begin disassembly ready for a detailed teardown.

[JimQuinn]

10:00 There is access to the ion pump from the chamber
so they can be roughed out, before turning them on.
You cannot start an ion-pump from air. You usually
pull them down to 10-5 Torr with a rotary, then diff or turbo,
valve off, then kick them on.

[edgeeffect]

I love your dot-matrix intro... So many people are "stealing" all the ideas I had for doing a technical YouTube channel but am far too lazy to start (let alone finish). :)
I was thinking "Oh no! He shouldn't tear that down... it's too cool... he should get it working"... but then you explained what parts were missing and I was like "Oh well... tear it down as much as you like, mate!".

[orthoarduino]

Hi ! Very nice video ! A few details regarding the video - the "X ray" detector is actually a secondary electron detector -it contains an aluminum coated scintillator, a light pipe (perspex/plexiglas) and a photomultliplier (most likely a Hamamatsu 268 - a SEM workhorse). The other - retractable - detector seems to be a backscatter electron detector or indeed an x-ray detector. Note that both aperture holders contain "boxes" with opamp which are used to compensate momentary fluctuation in electron flux

[lbochtler]

Some info on this microscope, since i have one. The microscope did not have its roughing pumps in the console. It used 2 external ones controlled by plugs on the column.

That loose pipe you mentioned, is most likely the LN2 output pipe for the LN2 cold baffle. (not 100% sure its actually LN2, its too soon to tell yet, but everything points to that cold baffle being LN2 filled.

Ill know more once i start the restoration. (i fully intend to document it on video)

edit:
Oh, and that separate port for the ion pumps, is the bypass valve needed to pump down the column to start the ion pumps.
Once the pumps start, this is closed, using the manual valves. Also the ion pumps run 24/7. Pumping the column down takes about a day or so. (at the very least, i will see how long it takes for my own machine, once i get the point where i can pump it down)

edit 2:
that thing you referred to as the x-ray detector is marked as the secondary electron detector in the manual. And the thing you referred to as the secondary electron detector, might actually be a x-ray spectrometer. Im guessing that, since it has an angled window, and is movable. Seeing as soft x-rays are conducted like regular light, it would make scene. I can also say, that my machine appears to only have the secondary electron detector installed. Though i might just be missing the xray spectrometer on my visual inspections, as well as reading the manual (it makes mentions of how to use it, but not where it is on the machine)

Also that detector on the aperture, is another beam monitor. This machine has 2.

[MaxKoschuh]

also, a big shoutout to Carl, for all the help, and providing space....

:-)

[MaxKoschuh]

!!!
that's awesome. what a great video! can't wait to see part 2.

don't dump the frame. it could do well as a hifi turntable basis.

[admanmccombs]

Any chance the LN2 baffle is still available? I have a fully functional JEOL JSM 35 that I want to start doing some bio work with, and that cold finger would be very useful.

[DoRC]

7:12 For anyone who just wants to get to the good stuff.

[ITTFami]

Is the EEVBlog forum the only place to ask for parts? Because those gang switches from the front would make an amazing source selector for my stereo system...

[msylvain]

That's a lot of CRT monitors and tables feet and random junk you have in storage in the background !

[ChipGuy]

12:45 Is it just me? That knob has a smiley printed on!

[Dustycircuit]

Hi, interesting video! I own a Cambridge Stereoscan 260 together with some friends. It needs some TLC and I will try to document the process of getting it working again. The electronics is old and a bit unusual. You can find a thread about it here (in Swedish)
Looking forward to seeing your teardown of the column :) Some nice wounded coils in there.

[Kirkh]

It really hurts my eyes to see such a jewel of technique being roughly rampaged for just feeding a video to youtube instead of getting it back to work as its condition seemed to be really good and this machine could have still offered a lot of nice and valuable imaging....

[bios]

OMG! for your channel there must be more subs!!!! wtf are people doing these days?!
Pewdiepie is GARBAGE in comparison to these....