Energy-gain measurements from a microwave inverse free-electron-laser accelerator |
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Authors: | Yoder R B Marshall T C Hirshfield J L |
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Institution: | Physics Department, Yale University, New Haven, Connecticut 06520-8124, USA. rodney.yoder@yale.edu |
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Abstract: | Experiments are reported on inverse free-electron-laser acceleration, including for the first time observations of the energy change as a function of relative injection phase of the electron bunches. The microwave accelerating structure consists of a uniform circular waveguide with a helical wiggler and an axial magnetic field. Acceleration of the entire beam by 6% is seen for 6 MeV electron bunches at optimum relative phase. Experimental results compare favorably, for accelerating phases, with predictions of a three-dimensional simulation that includes large-orbit effects. |
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