https://tube.loping.net/videos/watch/2549f912-a70e-42f6-8c29-82eb829f3fdc How to build and operate a simple mass spectrometer. Please ask questions in the comments, as always. (I had to re-upload this video to fix the ending --I'm very sorry if your early comments were lost!) Scientific American article: https://www.scientificamerican.com/article/the-amateur-scientist-1970-07/ $7.99 is a good value for the entire back issue in plain PDF format, and an example of a publisher being reasonable. I'm happy to support this. Original Dewdney paper: https://sci-hub.tw/https://doi.org/10.1119/1.1969211 https://en.wikipedia.org/wiki/Isotopes_of_potassium https://en.wikipedia.org/wiki/Ionization_energy https://en.wikipedia.org/wiki/Thermal_ionization https://en.wikipedia.org/wiki/Gyroradius https://www.patreon.com/AppliedScience Sun, 12 Jul 2026 13:21:39 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://tube.loping.net https://tube.loping.net/lazy-static/avatars/8a56e488-2120-4649-a417-badf5893657b.png https://tube.loping.net/videos/watch/2549f912-a70e-42f6-8c29-82eb829f3fdc All rights reserved, unless otherwise specified in the terms specified at https://tube.loping.net/about and potential licenses granted by each content's rightholder.