In the experiment, the XFEL photon energy was carefully tuned to match a specific electronic transition in highly charged copper ions created by a high-power laser. (IMAGE)

Helmholtz-Zentrum Dresden-Rossendorf

In the experiment, the XFEL photon energy was carefully tuned to match a specific electronic transition in highly charged copper ions created by a high-power laser.

Caption

In the experiment, the XFEL photon energy was carefully tuned to match a specific electronic transition in highly charged copper ions created by a high-power laser (red). Under these conditions, the X-ray light (bluish) excites electrons within the ions, which increases how strongly the plasma absorbs and emits radiation. These changes are directly measured in the experiment.

Credit

B. Schröder/HZDR

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