Blue B E, Clayton C E, O'Connell C L, Decker F-J, Hogan M J, Huang C, Iverson R, Joshi C, Katsouleas T C, Lu W, Marsh K A, Mori W B, Muggli P, Siemann R, Walz D
University of California, Los Angeles, California 90095, USA.
Phys Rev Lett. 2003 May 30;90(21):214801. doi: 10.1103/PhysRevLett.90.214801.
Plasma wakefields are both excited and probed by propagating an intense 28.5 GeV positron beam through a 1.4 m long lithium plasma. The main body of the beam loses energy in exciting this wakefield while positrons in the back of the same beam can be accelerated by the same wakefield as it changes sign. The scaling of energy loss with plasma density as well as the energy gain seen at the highest plasma density is in excellent agreement with simulations.
通过使一束28.5 GeV的强正电子束在1.4米长的锂等离子体中传播来激发并探测等离子体尾场。束流主体在激发这种尾场时会损失能量，而同一束流尾部的正电子则可在尾场符号改变时被同一尾场加速。能量损失随等离子体密度的标度以及在最高等离子体密度下观察到的能量增益与模拟结果非常吻合。
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