<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>Mean Free Path</title><description>Essays on vacuum, frontier physics, and the machines that make the impossible routine. By Pierre F. Ribault.</description><link>https://pierreribault.com/</link><item><title>The Names Nobody Cites</title><link>https://pierreribault.com/essays/the-names-nobody-cites/</link><guid isPermaLink="true">https://pierreribault.com/essays/the-names-nobody-cites/</guid><description>The cited names build the chips. The names nobody cites hold the vacuum.</description><pubDate>Tue, 07 Jul 2026 00:00:00 GMT</pubDate></item><item><title>No Dashboard Pumps Faster</title><link>https://pierreribault.com/essays/no-dashboard-pumps-faster/</link><guid isPermaLink="true">https://pierreribault.com/essays/no-dashboard-pumps-faster/</guid><description>A dashboard is not an oracle. It is a memory.</description><pubDate>Mon, 29 Jun 2026 00:00:00 GMT</pubDate></item><item><title>Tight Enough</title><link>https://pierreribault.com/essays/tight-enough/</link><guid isPermaLink="true">https://pierreribault.com/essays/tight-enough/</guid><description>Hermetic is not a number. It is a network held below its threshold.</description><pubDate>Wed, 17 Jun 2026 00:00:00 GMT</pubDate></item><item><title>The Better Ceramic</title><link>https://pierreribault.com/essays/the-better-ceramic/</link><guid isPermaLink="true">https://pierreribault.com/essays/the-better-ceramic/</guid><description>What a material costs once it leaves the datasheet.</description><pubDate>Thu, 11 Jun 2026 00:00:00 GMT</pubDate></item><item><title>The Arc</title><link>https://pierreribault.com/essays/the-arc/</link><guid isPermaLink="true">https://pierreribault.com/essays/the-arc/</guid><description>The one failure a tube, an accelerator, and a fusion magnet all share, and the craft that keeps it away.</description><pubDate>Tue, 02 Jun 2026 00:00:00 GMT</pubDate></item><item><title>Everything Outgasses</title><link>https://pierreribault.com/essays/everything-outgasses/</link><guid isPermaLink="true">https://pierreribault.com/essays/everything-outgasses/</guid><description>A law that does not care whether you are building an X-ray tube, an accelerator, or a star.</description><pubDate>Sun, 31 May 2026 00:00:00 GMT</pubDate></item></channel></rss>