“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 13302
School of Particles and Accelerator
  Title:   Time-Dependent Simulation of Prebunched One and Two-Beam Free Electron Laser
1.  Najmeh Sadat Mirian
2.  Behrouz Maraghechi
  Status:   Published
  Journal: Phys. Plasmas
  No.:  043108
  Vol.:  21
  Year:  2014
  Supported by:  IPM
A numerical simulation in one-dimension is conducted to study the slippage effects on prebunched free electron laser. A technique for the simulation of time dependent FEL to model the slippage effects is introduced, and the slowly varying envelope approximation in both z and t is used to illustrate the temporal behaviour in the prebunched FEL. Slippage effect on prebunched two-beam FEL is compared with the one-beam modeling. The evaluation of the radiation pulse energy, thermal and phase distribution, and radiation pulse shape in one-beam and two-beam modeling is studied. It was shown that the performance is considerably undermined when the slippage time is comparable to the pulse duration. However, prebunching reduces the slippage. Prebunching also leads to the radiation pulse with a single smooth spike

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