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Explore simulation results on microbunching instability using a velocity bunched beam at the FLASH FEL Beam Dynamics Meeting in 2007. The study includes Velocity Bunching Phase scan, Dipole Magnet Curvature Radius investigations, GlueTrack interpretation, and conclusive findings for future steps.
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Simulation Results ofMicrobunching Instabilitywith Velocity Bunched Beamon the FLASH FEL Beam Dynamics Meeting July 23, 2007 Donghoon Kuk (MPY)
Contents • GlueTrack • Velocity bunching phase(φ2) scan • BC2 dipole magnet curvature bending radius scan • BC3 dipole magnet curvature bending radius scan • Conclusion
GlueTrack Igor Zagorodnov - GlueTrack Interpreter for S2E Beam Dynamic Simulations Jan 23, 2006
From Mikhail Krasilnikov Velocity Bunching Phase Scan • Velocity bunching phase scan (ACC1)
Velocity Bunching Phase Scan • Phi2 Scan (-90˚ ~ -105 ˚) At the End of ACC1
Velocity Bunching Phase Scan • Selected phi2 = -98 ˚
BC3 Scan (type1) BC2=2.524955 BC3=3.60 BC2=2.604955 BC3=3.60
BC3 Scan (type2) BC2=2.524955 BC3=4.4 BC2=2.524955 BC3=4.2 BC2=2.544955 BC3=4.4 BC2=2.564955 BC3=4.2
BC3 Scan (type2) BC2=2.524955 BC3=4.4 BC2=2.524955 BC3=4.2 BC2=2.544955 BC3=4.4 BC2=2.564955 BC3=4.2
BC3 Scan (type2) BC2=2.564955 BC3=4.4
BC3 Scan (type2) BC2=2.564955 BC3=4.4
BC3 Scan (type3) BC2=2.544955 BC3=3.6 Needs more exact numerical analysis! BC2=2.584955 BC3=3.6 BC2=2.564955 BC3=3.6
BC3 Scan (type4) BC2=2.524955 BC3=3.8 BC2=2.524955 BC3=4.0 BC2=2.584955 BC3=4.4 BC2=2.584955 BC3=4.2
BC3 Scan (type4) BC2=2.524955 BC3=3.8 BC2=2.524955 BC3=4.0 BC2=2.584955 BC3=4.4 BC2=2.584955 BC3=4.2
BC3 Scan (type4) BC2=2.604955 BC3=3.8 BC2=2.604955 BC3=4.0 BC2=2.604955 BC3=4.4 BC2=2.604955 BC3=4.2
BC3 Scan (type4) BC2=2.604955 BC3=3.8 BC2=2.604955 BC3=4.0 BC2=2.604955 BC3=4.4 BC2=2.604955 BC3=4.2
Conclusion • Next Step • Increase the particle number order of million to check the microbunching instability from the numerical error • Gain calculation • In acknowledgment for guidance of Torsten Limberg, Igor Zagorodnov and all the other people of the MPY.