Why avoiding turnover is important
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?”)
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2026年3月2日凌晨5時58分
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这类场景也很能体现 Expert 的定位，它尝试把一整段专业工作流程产品化，从增强单次问答的模式里彻底跳了出来。
To counter the Shaheds, Kyiv developed low-cost interceptor drones priced at roughly $1,000 to $2,000, moving the systems from prototype to mass production within months in 2025.。关于这个话题，新收录的资料提供了深入分析