Three-dimensional, time-dependent analysis of high- and low-Q free-electron laser oscillators
Peter J.M. van der Slot, Henry P. Freund
TL;DR
This paper presents a comprehensive 3D, time-dependent analysis of free-electron laser oscillators across different gain regimes, incorporating modeling tools and experimental data to evaluate performance factors.
Contribution
It introduces a detailed modeling approach combining MINERVA and OPC codes to study FEL oscillators with various resonator qualities and gain regimes, including effects of mirror aberrations.
Findings
Modeling of FEL oscillators with different configurations
Impact of mirror aberrations and thermal deformation analyzed
Comparison with experimental data for validation
Abstract
Free-electron lasers (FELs) have been designed to operate over virtually the entire electromagnetic spectrum from microwaves through x-rays and in a variety of configurations including amplifiers and oscillators. Oscillators can operate in both the low and high gain regime and are typically used to improve the spatial and temporal coherence of the light generated. We will discuss various FEL oscillators ranging from systems with high-quality resonators combined with low-gain undulators to systems with a low-quality resonator combined with a high-gain undulator line. The FEL gain code MINERVA and wavefront propagation code OPC are used to model the FEL interaction within the undulator and the propagation in the remainder of the oscillator, respectively. We will not only include experimental data for the various systems for comparison when available, but also present for selected cases…
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