Speaker
Description
The Ming Xie* formula for shot noise has been widely used to estimate the performance of SASE free-electron lasers and has been compared with various simulation codes with great success. However, the formula is directly applicable only to a single slice of the electron beam and it would be useful to generalize the formula to treat arbitrary temporal bunch shapes. Ming’s formula applies predicts the noise power Pnoise scales as Ib to the 2/3power. If we assume that the current is time-dependent with some temporal shape, then we can integrate over time in the bunch to get the energy emitted by the entire bunch. This generalization has been applied to two SASE (LCLS and SPARC) FELs and compared with experimental measurements and simulations with the MINERVA FEL code with good agreement.
Footnotes
*Ming Xie, Design optimization for an x-ray free electron laser driven by the SLAC linac, Proc. IEEE 1995 Particle Accelerator Conference, Vol. 183, IEEE Cat. No. 95CH35843 (1995).
Funding Agency
None
| I have read and accept the Privacy Policy Statement | Yes |
|---|