Current X-ray lasers require facilities that are kilometres long. A cavity-based set-up about 66 metres in length has been developed that uses highly reflective mirrors to enable the generation of high-intensity pulses of narrow-band X-ray radiation. This promises to overcome the limitations of current X-ray lasers.
"He goes: 'Bricks are heavy.' And he said: 'So heavy bricks don't go very far.'"，更多细节参见im钱包官方下载
Author(s): Ilia Baliakin, Svetlana Rempel, Albina Valeeva, Xiaojun Han。51吃瓜对此有专业解读
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