One of the best is a beam of protons.

最佳射线之一是质子射线。

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The first attempt to accelerate each of two opposing beams of protons to 3.5 TeV apiece failed when a power supply shut down inadvertently and a new magnet-protection system tripped, dumping the beam.

第一次尝试把两个加快的对立的质子束各以3.5兆电子伏特的电压加速时，遭到了失败。只是无意中关闭电源和一个新的磁保护系统跳闸，倾翻了质子束。

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This weekend's test will mark CERN's first attempt to feed protons (or, simply, "beam") into the LHC from a chain of smaller accelerators.

本周末的测试标志着CERN首次通过一系列小型加速器将质子(或简称为“束”)导入LHC。

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The researchers fired a beam of calcium ions, each containing 20 protons, into a target of californium, a highly radioactive synthetic substance with 98 protons.

ECONOMIST: Nuclear physics: Magical shell game | The