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Statistical analysis of crossed undulator for polarization control in a self-amplified spontaneous emission free electron laser
- Source :
- Physical Review Special Topics. Accelerators and Beams, Vol 11, Iss 3, p 030702 (2008)
- Publication Year :
- 2008
- Publisher :
- American Physical Society, 2008.
-
Abstract
- 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 Phys. Res., Sect. A 445, 329 (2000)NIMAER0168-900210.1016/S0168-9002(00)00137-6] 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° rotated planar undulator after the main SASE planar undulator, one can obtain circularly polarized light—with over 80% polarization—near the FEL saturation.
- Subjects :
- Nuclear and particle physics. Atomic energy. Radioactivity
QC770-798
Subjects
Details
- Language :
- English
- ISSN :
- 10984402
- Volume :
- 11
- Issue :
- 3
- Database :
- Directory of Open Access Journals
- Journal :
- Physical Review Special Topics. Accelerators and Beams
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.79293a297d4440a95483f93f26cdf7a
- Document Type :
- article
- Full Text :
- https://doi.org/10.1103/PhysRevSTAB.11.030702