# Talk:Donald William Kerst

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Reviewer: Peacemaker67 (talk · contribs) 10:23, 24 December 2014 (UTC)

Changes made as suggested. Hawkeye7 (talk) 11:25, 25 December 2014 (UTC)

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The article states:
When it became operational on July 15, 1940, Kerst became the first person to accelerate electrons using electromagnetic induction, reaching energies of 2.3 MeV.
However, the caption of this picture https://en.wikipedia.org/wiki/File:First_betatron_1940.jpg states:
The first betatron, a particle accelerator that accelerates electrons, built at University of Illinois in 1940 by Donald W. Kerst, seen at right working on the pole pieces. It consisted of a 4 ton electromagnet with a donut-shaped vacuum chamber circling the pole piece and produced 24 Mev electrons.
So how much energy did those electrons carry? 2.3 MeV, or 24 MeV?
In addition, that photograph shows the betatron as a large machine, almost as wide and tall as an adult male, but the article provides a citation (namely this one http://web.archive.org/web/20240612183829/http://www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/kerst-donald.pdf ) about a portable betatron  that emitted 4 MeV electrons. If the picture shows the first betatron, and the second emits more energetic electrons, how can it be portable?
All points to that photograph not showing the first betatron. So is there an actual photograph of the first betatron? Devil Master Resurrection (talk) 03:22, 3 May 2025 (UTC)