| Paper | Title | Page |
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| MOPPH034 | Mirror Aberrations in Low Gain FEL Oscillators | 63 |
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To generate radiation with high spatio-temporal quality in FELs, oscillators are to be used whch are based on the combination of low gain with a large number of roundtrips in a low-loss optical resonator. Clearly, in this situation any additional loss or aberration may seriously degrade the performance and beam quality, and this becomes extremely important for high average power FEL oscillators such as the JLAB system*. Nevertheless, so far no systematic study has been made how various mirror aberrations affect the performance of such low gain FEL oscillators. Here we present the first results of such a study. Ths approach is based on the optical propagation code OPC** with the Genesis 1.3*** gain code.
* SV Benson et.al. Nucl. Instr. and Meth. A483, 434 (2002). |