The Effects of Accelerator Frequency and Electron Beam Focusing in Free Electron Lasers
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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Lowering the frequency in a superconducting accelerator for a free electron laser FEL has the potential to reduce the size, cost, and power consumption of the FEL system. A lower frequency also enables the use of longer pulses, which has been shown to improve FEL performance. Using simulation codes developed at the Naval Postgraduate School, the performance of FEL amplifiers and oscillators at several accelerator frequencies is investigated. The results show that both FEL amplifier and oscillator performance can be improved by lowering the accelerator frequency. In addition, a simulation has been developed that tracks electron trajectories through several quadrupole magnets and an FEL undulator. Electron trajectories can directly impact FEL performance, and stray electrons may cause damage or harmful radiation if they strike beamline components. This simulation has potential as a future research and design tool.
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