Stephen Brooks 🦆<p>Beam dynamics in <a href="https://mstdn.io/tags/accelerators" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>accelerators</span></a> usually assumes your bunch has a finite temperature. But what if your bunch has zero temperature? This is the case for transporting ultra-low emittance bunches (Coulomb crystals) from ion traps. The usual "beta functions" don't really work, so I developed equations for the 3D fully-coupled dynamics in the note below. I'm hoping it can be used to do stability analysis (in 21 parameter space, so many ways it can go unstable!) <a href="https://mstdn.io/tags/physics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>physics</span></a></p><p><a href="https://stephenbrooks.org/ap/report/2025-9/model_order1_analytic.pdf" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">stephenbrooks.org/ap/report/20</span><span class="invisible">25-9/model_order1_analytic.pdf</span></a></p>
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My NSF funding was terminated but I still need to attend AAPT national meetings! Please consider helping me continue my work with two-year college physics and astronomy faculty around the country! I pledge complete transparency and fiscal responsibility. I will appreciate and acknowledge all contributions! #ITeachPhysics #AAPT #OPTYCs #Physics #Workshops #CommunityCollege
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The permanent magnets (built by SABR Enterprises, LLC.) delivered up to 1.85 Tesla of field to bend the beams on this tight radius.
More information on the design:
https://www.bnl.gov/newsroom/news.php?a=222471
Brookhaven National LaboratoryMagnets with Potential to Zap Tumors in a FlashChain of magnets transports proton beams over wide range of energies in test of technology for future cancer treatment
This video shows hadron beams of different energies being transmitted through the same string of nine permanent magnets, which is a prototype 22.5° section of a fixed-field hadron therapy accelerator.
Cameras 1 and 2 point at fluorescent screens upstream of the magnets and cameras 3 and 4 show the beam coming out.
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https://www.europesays.com/uk/433347/ New Method Proposed To Detect Universe’s Mysterious “Phantom Heat” Predicted by Einstein #HiroshimaUniversity #ParticlePhysics #Physics #QuantumMechanics #Relativity #Science #spacetime #UK #UnitedKingdom
https://www.europesays.com/uk/432729/ Scientists Detect Strange Signal in Gravitational Waves #Physics #Science #UK #UnitedKingdom
An effort to detect the rumblings of distant black holes hears its clearest signal yet – as budget cuts cloud its future (The Globe and Mail (Ontario Edition)), Sep 11, 2025
https://globe2go.pressreader.com/article/281496462425838
globe2go.pressreader.com · An effort to detect the rumblings of distant black holes hears its clearest signal yet – as budget cuts cloud its future - The Globe and Mail (Ontario Edition) (2025-09-11)Globe2Go, the digital newspaper replica of The Globe and Mail
OK, so the results from my very unscientific #NobelPrize in #Physics topic poll are in, and the winner is … Atomic, Molecular, and Optical Physics (or “AMO”, as it’s short-handed). Hot on the heels of AMO is Astrophysics and Cosmology. Particle Physics was the hands-down least-favoured topic.
So, let’s go one more step and see what the #fediverse thinks are its favourite **discoveries** that might attract the prize. Let’s stick to AMO and Astro/Cosmo, since those are the preferred areas.
