Courtesy of Korg
They also needed an alternative to conventional X-rays. In a clinical linac, X-ray photons are produced by dumping high-energy electrons into a bremsstrahlung target, which is made of a material with a high atomic number, like tungsten or copper. The target slows the electrons, converting their kinetic energy into X-ray photons. It’s an inherently inefficient process that wastes most of the beam power as heat and makes it extremely difficult to reach the ultrahigh dose rates required for FLASH. High-energy electrons, by contrast, can be switched on and off within milliseconds. And because they have a charge and can be steered by magnets, electrons can be precisely guided to reach tumors deep within the body. (Researchers are also investigating protons and carbon ions; see the sidebar, “What’s the Best Particle for FLASH Therapy?”)
Президент США Дональд Трамп проведет переговоры с канцлером Германии Фридрихом Мерцем в Белом доме во вторник, 3 марта. Об этом заявил заместитель пресс-секретаря немецкого кабмина Себастьян Хилле, передает РИА Новости.，更多细节参见新收录的资料
Want to feel like you just got a new computer for $50? It sounds too good to be true, but The Ultimate Microsoft Office Professional 2021 for Windows lifetime license and Windows 11 Pro Bundle comes packed with enough upgrades to make a dusty old PC feel totally refreshed. You can get the bundle now for $49.97.。新收录的资料是该领域的重要参考
Practice 2 — 12-1 a.m. ET on March 6。关于这个话题，新收录的资料提供了深入分析
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