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Title: Novel techniques in free electron lasers
Author: Henderson, James Robert
ISNI:       0000 0004 5347 6707
Awarding Body: University of Strathclyde
Current Institution: University of Strathclyde
Date of Award: 2015
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Free Electron Lasers can generate high power transversely coherent tunable radiation. X-ray radiation can be generated in the Self Amplified Spontaneous Emission regime, however this radiation has poor temporal coherence. The Echo-Enabled Harmonic Generation method can improve the radiation's temporal coherence in x-ray. In this thesis analysis of the Echo-Enabled Harmonic Generation technique reveals that electron pulse has a modal density profile. This density profile when matched to amplification profile of an undulatorchicane lattice generates a train of coherent radiation spikes. The interaction of multiple electron pulses is investigated in this thesis. Propagating multiple electron pulses through an undulator produce a train of radiation spikes. The temporal separation of the radiation spikes can be manipulated using magnetic chicanes. Two new techniques are then proposed to improve FEL performance when the electron pulse has a large energy spread, such as those produced in plasma accelerators. These techniques use seeded-undulators and chicanes to manipulate the electron phase space prior to injection through an undulator-chicane lattice.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral