Advanced Scheme to Generate MHz, Fully Coherent FEL Pulses at nm Wavelength
| Autor: | Fabian Pannek, Johann Zemella, Lucas Schaper, Tino Lang, Bart Faatz, Gianluca Geloni, Sven Ackermann, Georgia Paraskaki |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Brightness QH301-705.5 QC1-999 01 natural sciences Linear particle accelerator law.invention seeded FEL high repetition rate Optics law 0103 physical sciences oscillator General Materials Science Biology (General) 010306 general physics QD1-999 Instrumentation Fluid Flow and Transfer Processes Physics 010308 nuclear & particles physics business.industry Process Chemistry and Technology Amplifier General Engineering Engineering (General). Civil engineering (General) Laser Computer Science Applications Chemistry Wavelength Phase space amplifier Harmonic Physics::Accelerator Physics TA1-2040 business ddc:600 Coherence (physics) |
| Zdroj: | Applied Sciences 11(13), 6058 (2021). doi:10.3390/app11136058 Applied Sciences Volume 11 Issue 13 Applied Sciences 11(13), 6058 (2021). doi:10.3390/app11136058 special issue: "Oscillator-Amplifier Free Electron Lasers an Outlook to Their Feasibility and Performances" Applied Sciences, Vol 11, Iss 6058, p 6058 (2021) |
| DOI: | 10.3390/app11136058 |
| Popis: | Applied Sciences 11(13), 6058 (2021). doi:10.3390/app11136058 special issue: "Oscillator-Amplifier Free Electron Lasers an Outlook to Their Feasibility and Performances" Current FEL development efforts aim at improving the control of coherence at high repetition-rate while keeping the wavelength tunability. Seeding schemes, like HGHG and EEHG, allow for the generation of fully coherent FEL pulses, but the powerful external seed laser required limits the repetition-rate that can be achieved. In turns, this impacts the average brightness, and the amount of statistics that experiments can do. In order to solve this issue, here we we take a unique approach and discuss the use of one or more optical cavities to seed the electron bunches accelerated in a superconducting linac to modulate their energy. Like standard seeding schemes, the cavity is followed by a dispersive section, which manipulates the longitudinal phase space of the electron bunches, inducing longitudinal density modulations with high harmonic content that undergo the FEL process in an amplifier placed downstream. We will discuss technical requirements for implementing these setups and their operation range based on numerical simulations. Published by MDPI, Basel |
| Databáze: | OpenAIRE |
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