Re: Building electron microscope

In article <1151746910.373824.142710@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
cladocera56@xxxxxxxxxxxx wrote:

mike4ty4@xxxxxxxxx wrote:
Hi.

I heard that building an electron microscope would require "a lot of
money and the resources of a university engineering department". Now, a
few questions, just for curiosity:

1. Would the cost of all the equipment needed to build the thing far
exceed the cost of buying an already-made one (which is around $50,000
- $100,000 last time I checked)?

2. If I had $500,000,000, would getting access to the resources of a
university engineering department be trivial?

Hi

The article below might be of interest; it shows the homemade TEM built
by Robert Holzrichter, a professional electrical engineer.

'Progress with a home-made transmission electron microscope'
http://www.microscopy-uk.org.uk/mag/artapr01/rhtem.html

He also recently featured in 'Wired' magazine which mentions the time
and investment he put into it and a clickable photo at page left of the
set-up.

http://www.wired.com/wired/archive/14.04/start.html?pg=7


regards

David


You might be able to build a very crude one using the neck and emitter
of an old B/W crt. You would cut the neck off and fuse it to a longer
glass barrel to match the old crt's length of flight. You would have to
adjust the horizontal and vertical scans so they might cover just a
square centimeter. The detector would have to be a scintillator
sensitive to electrons and coupled to a photomultiplier tube. The
magnification would be rather small, just the square centimeter to
whatever size monitor you have. So if the monitor is 20cm wide, you
would have a mag. of 20. The resolution would be limited to whatever the
crt was capbable. Most of the electronics would already be there from
the old B/W TV. Maybe you could even use the guts of an old 'Oscope.

This might even be a good science fair project for an enterprising youth.

al
.

Relevant Pages

  • Re: Building electron microscope
    ... money and the resources of a university engineering department". ... I see that your definition of electron ... three types of EMs: TEM, ...
    (sci.techniques.microscopy)
  • Re: Building electron microscope
    ... money and the resources of a university engineering department". ... Would the cost of all the equipment needed to build the thing far ... 'Progress with a home-made transmission electron microscope' ...
    (sci.techniques.microscopy)
  • Re: Building electron microscope
    ... I heard that building an electron microscope would require "a lot of ... money and the resources of a university engineering department". ...
    (sci.techniques.microscopy)
  • Re: holy crap! ap2 motherload....kfest guys rent a van!
    ... kid you not) to run electron micro-scopes back in the 80's ..the modified ... it uses an extra card slot..so if i don't get my proslot back i'll never get ... lab looking with odd wires ...a modified (i kid you not) game port adaptor ... i did see an electron microscope from that era supposedly work on ebay go ...
    (comp.sys.apple2.marketplace)
  • Re: Twisted Lyrics
    ... Think "electron beam", the electro-optical equivalent of light beam in and ... electron microscope. ... You're not the boss of me! ...
    (rec.humor)