Statistical Analysis of Crossed Undulator for Polarization Control in a SASE FEL
| dc.creator | Ding, Yuantao | |
| dc.creator | Huang, Zhirong | |
| dc.date | 2008-01-10 | |
| dc.date.accessioned | 2026-07-07T11:14:02Z | |
| dc.date.available | 2026-07-07T11:14:02Z | |
| dc.description | There is a growing interest in producing intense, coherent x-ray radiation with an adjustable and arbitrary polarization state. In this paper, we study the crossed undulator scheme (K.-J. Kim, Nucl. Instrum. Methods A {\bf 445}, 329 (2000)) for rapid polarization control in a self-amplified spontaneous emission (SASE) free electron laser (FEL). Because a SASE source is a temporally chaotic light, we perform a statistical analysis on the state of polarization using FEL theory and simulations. We show that by adding a small phase shifter and a short (about 1.3 times the FEL power gain length), $90^\circ$ rotated planar undulator after the main SASE planar undulator, one can obtain circularly polarized light -- with over 80% polarization -- near the FEL saturation. | |
| dc.description | 14 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0801.1659 | |
| dc.identifier | http://arxiv.org/abs/0801.1659 | |
| dc.identifier | Phys.Rev.STAccel.Beams11:030702,2008 | |
| dc.identifier | doi:10.1103/PhysRevSTAB.11.030702 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/191930 | |
| dc.subject | Accelerator Physics | |
| dc.title | Statistical Analysis of Crossed Undulator for Polarization Control in a SASE FEL | |
| dc.type | text |