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“Circular” Polarization Control Options. Planar + Helical (~6 m ). Planar (x). APU. APU. APU. operate near saturation. 3 to 4 two-meter APPLEs ~3 to 4 L G to reach saturation and produce dominate P c. Planar + Crossed Planar (2-4 m ). Planar (x). APU. APU.
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Planar + Helical (~6 m) Planar (x) APU APU APU operate near saturation 3 to 4 two-meter APPLEs ~3 to 4LGto reach saturation and produce dominate Pc • Planar + Crossed Planar (2-4 m) Planar (x) APU APU 1 or 2 two-meter APPLE, in planar mode (y) ~1.3LGto have equal Py operate near saturation Fast polarization control with pulsed phase shifter • Planar + Crossed Pair at 2nd Harmonic (2 m each) Planar (x) APU APU 2-m APPLEs in crossed configuration tuned to 2nd harmonic operate in saturation Fast polarization control with pulsed phase shifter
Achromatic and isochronous bend Achromatic and isochronous bend must preserve m-bunching at 1 nm scale very challenging!
“Circular” Polarization Control Options • Planar (to near saturation) + Helical (~6 m) • Stable • >90% polarization • Slow switching • Planar (to near saturation) + Crossed Planar (2-3 m) • ~80% polarization • fast switching • may have fluctuations • Planar + Crossed Pair at 2ndHarmonic (1-2 m each) • Stable • ~90% • fast switching • ~1% of fundamental power • Planar + Bends to Separate m-Bunched Beam • + Crossed Pair at 1stHarmonic (1-2 m each) • Stable • ~90%, fast switching • not sure m-bunching can be preserved in realistic bending system