A few tips for getting started and going.
A few discussion over the mail to get started. Mails are in the order of arrival.
Courtesy: Prof. Pease
<aside> 💡 Making a 40,000-volt battery that can deliver 20nA for 100 hours. Start by learning how a simple battery works. Nothing fancy just a regular dry cell. Then try to build a 1 volt battery about 3mm x 3mm and later shrink it to 1mm x 1mm. The make a linear array of, say, 8 of them.
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<aside> 💡 Yet another is to come up with a mechanically scanned sample stage that can scan a 1mm x 1mm are in 10s with 500 lines. Some of the flexure mechanics plus voice coils.
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<aside> 💡 A high voltage (40,000-volt) very low capacity (e.g.10nA for 1000 hours). Detecting the signal (probably backscattered electrons) Maximizing image quality with the least number of electrons Minimizing loss of image quality resulting from the beam traveling through air or water vapor (e.g. 10 Torr). Massive computation might help. Andrea’s quantum entanglement ideas might be useful applied here. Achieving a vacuum of 10 Torr cheaply without wall plug (‘mains') power. Maybe use a treadle)
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<aside> 💡 Should be stable to 100ppm over 1 second delivering 20nA current. Battery, Voltage multiplier or van der Graaff? Can we make a frugal van der Graaff generator to give 40,000 volts (need spherical soda cans)? ??: How can we make a frugal (<$25) vacuum pump to give 10Torr Vacuum in 0.1L volume?? (Toepler pump??)
If we need 10,000 dots per pixel how much primary current should strike the sample to get a such an image of a silicon structure in 500s?
I am to deliver some background material on electron scattering. For now I indicated that the range R (depth of penetration) of a V-volt electron is approximately given by : R= ((V/10000)^1.75)/(14N) microns where N is the atomic number of the material being penetrated.
I will Google ‘Monte-Carlo calculations of electron scattering in solids’
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Background: https://patents.google.com/patent/US20170062179