Open access
Date
2023-06Type
- Journal Article
ETH Bibliography
yes
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Abstract
A confined electron laser is a “wiggled” electron beam confined by the ponderomotive forces inside an electromagnetic cavity. The ponderomotive forces counteract the beam expansion due to space-charge forces, thereby enabling lasing at low energies. In this Letter we show the possibility of lasing at a wavelength of approximately 4 nm in the soft-x-ray regime. We simulate various cavity parameters and show that electron-beam confinement and consequently the initiation of the lasing process are independent of the cavity resonance wavelength. We also show that ponderomotive confinement can compensate for the beam divergence due to nonzero emittance, thereby enabling lasing with large emittance values for which the free-electron lasing condition is violated. Our results support the feasibility of a few femtosecond, compact, and coherent soft-x-ray source. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000619411Publication status
publishedExternal links
Journal / series
Physical Review AVolume
Pages / Article No.
Publisher
American Physical SocietyOrganisational unit
03944 - Novotny, Lukas / Novotny, Lukas
Funding
190840 - Relativistic Particle Trapping for Compact Coherent X-Ray Sources (SNF)
Related publications and datasets
Is supplemented by: https://doi.org/10.3929/ethz-b-000619716
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ETH Bibliography
yes
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