Performance of the ALS elliptical wiggler
The elliptical wiggler is a circularly polarized light source capable of providing very broad spectral coverage and high degree of circular polarization. The main features of an elliptical wiggler can be understood through analogy to bending magnet radiation. However, some aspects, such as the end structure`s influence on the degree of circular polarization, require more elaborate methods to characterize. We present an algorithm based on the stationary phase method, which allows calculation of radiation properties from an arbitrary electron trajectory; so a non-sinusoidal magnetic field`s influence on the radiation performance can be taken into account. We show general radiation properties of an ellilptical wiggler and discuss factors affecting radiation performance. Practice issues encountered during the conceptual design of an ellilptical wiggler at the Advanced Light Source are addressed.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 10186744
- Report Number(s):
- LBL-34547; CONF-930824-7; ON: DE94001252; TRN: 93:024073
- Resource Relation:
- Conference: Synchrotron radiation instrumentation,Gaithersburg, MD (United States),23-26 Aug 1993; Other Information: PBD: Aug 1993
- Country of Publication:
- United States
- Language:
- English
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