Abstract
The polarization properties of backscattered radiation from a relativistic electron beam are analyzed. It is shown that the polarization state of the backscattered radiation is changed with respect to that of the incoming radiation whenever a transverse component is present in the velocity distribution of the electron beam. Changes of polarization properties are evaluated in order to serve as a diagnostic tool for electron-beam parameters relevant to the performance of free-electron lasers, namely the beam emittance and the wiggler parameter. A measurable dimensionless "depolarization parameter" is introduced which directly measures these two parameters.
Original language | English |
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Pages (from-to) | 1923-1926 |
Number of pages | 4 |
Journal | Journal of Applied Physics |
Volume | 69 |
Issue number | 4 |
DOIs | |
State | Published - 1991 |