DIY electron microscope
Brmsem |
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founder: | mrkva |
depends on: | |
interested: | status=active |
software license: | - |
hardware license: | - |
Overview
Goal of this project is to assess whether is possible to build a scanning electron microscope in DIY conditions. There are various sensors that can be used together with SEM - the easiest one to get running is probably the secondary emission detector. However it would be great if we would be able to use backscatter detectors or even X-ray detector for EDX spectroscopy one day!
It will also be necessary to get some kind of metal sputtering working to be able to view non-metallic samples.
Bill of materials
(We'll begin with coarse building blocks and discuss details later)
Vacuum chamber (we have one, check if it is usable)
Base for vacuum chamber with airtight connectors for high and low voltage leads
Vacuum pumps system for fine vacuum
Various power supplies (accelerating voltage, focusing voltage, heater), exact parameters will have to be calculated
electron gun: electron source, electron optics
detector (scintillator + photomultiplier)
display - for initial tests two channel analog oscilloscope with XY mode and z input should be enough (mrkva can provide one). Later, ADC and digital processing is desirable
Proposed roadmap
Useful sources