Instead of a continuous stream, the electron beam is divided into nanosecond-long bunches—billions of electrons riding the radio-frequency field like surfers. Inside the accelerator’s cavities, the field flips polarity 12 billion times per second, so timing is everything: Only electrons that arrive perfectly in phase with the accelerating wave will gain energy. That process repeats through a chain of cavities, each giving the bunches another push, until the beam reaches its final energy of 200 MeV.
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白宫发言人Kush Desai在一份声明中表示：“总统依法行使了国会授予的权力，暂停最低限额豁免。政府将全力捍卫这一政策调整，以维护我们的国家安全和经济安全。”
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