Projects per year
Abstract
It is shown that the output frequency of a free electron laser may be modulated to generate a series of modes that span a bandwidth of at least an order of magnitude greater than the normal FEL bandwidth. This new method of frequency modulated FEL operation has close analogies to frequency modulation in conventional cavity lasers. The FM-FEL is analysed and described in the linear regime by a summation over the exponentially amplified frequency modes.
Simulations using a 3D, broad bandwidth, numerical code also demonstrate FM-FEL operation for parameters typical of FEL facilities currently under construction. Harmonic bunching methods are used to seed the FM-FEL modes to generate a temporally correlated frequency modulated output over a large bandwidth. This new, FM-FEL mode of operation scales well for X-ray generation, offering users a significantly new form of high-power, short wavelength FEL output.
Simulations using a 3D, broad bandwidth, numerical code also demonstrate FM-FEL operation for parameters typical of FEL facilities currently under construction. Harmonic bunching methods are used to seed the FM-FEL modes to generate a temporally correlated frequency modulated output over a large bandwidth. This new, FM-FEL mode of operation scales well for X-ray generation, offering users a significantly new form of high-power, short wavelength FEL output.
Original language | English |
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Pages (from-to) | 8792-8799 |
Number of pages | 8 |
Journal | Optics Express |
Volume | 27 |
Issue number | 6 |
DOIs | |
Publication status | Published - 18 Mar 2019 |
Keywords
- electric fields
- free electron lasers
- frequency modulated lasers
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Dive into the research topics of 'Frequency modulated free electron laser'. Together they form a unique fingerprint.Profiles
Projects
- 3 Finished
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Simulations for Future X-ray Free electron Lasers
EPSRC (Engineering and Physical Sciences Research Council)
1/02/15 → 31/01/17
Project: Research
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E Infrastructure Bid - Capital Equipment Bid
Littlejohn, D., Fedorov, M., Mulheran, P. & Reese, J.
EPSRC (Engineering and Physical Sciences Research Council)
20/01/12 → 31/03/12
Project: Research
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STFC MoA 4132361: Free Electron Lasers and Advanced Light Sources
STFC Science and Technology Facilities Council
1/04/11 → 31/03/21
Project: Research