Abstract
We propose a new concept of an electron source for ultrafast electron diffraction with sub-10~fs temporal resolution. Electrons are generated in a laser-plasma accelerator, able to deliver femtosecond electron bunches at 5 MeV energy with kHz repetition rate. The possibility of producing this electron source is demonstrated using Particle-In-Cell simulations. We then use particle tracking simulations to show that this electron beam can be transported and manipulated in a realistic beamline, in order to reach parameters suitable for electron diffraction. The beamline consists of realistic static magnetic optics and introduces no temporal jitter. We demonstrate numerically that electron bunches with 5~fs duration and containing 1.5~fC per bunch can be produced, with a transverse coherence length exceeding 2~nm, as required for electron diffraction.
Highlights
In the past decade, there has been great progress in plasma-based techniques for accelerating particles [1]
Temporal jitter should not be of concern, and sub-10-fs temporal resolution should be attainable in experiments
We show that the beam line is able to provide ≃5-fs bunches with femtocoulomb charge and normalized transverse emittances of εn⊥ ≃ 10–20 nm
Summary
There has been great progress in plasma-based techniques for accelerating particles [1]. Laser-plasma accelerators provide electron beams ranging from hundreds of MeV [2,3,4] to multiGeV energies [5,6] and charges in the tens of picocoulomb range. [13], an 80 MeV electron beam with 1.5-fs rms duration was experimentally demonstrated This emerging technology holds the promise of compact particle accelerators delivering high charge femtosecond bunches with intrinsic synchronization to an optical pulse. Temporal jitter should not be of concern, and sub-10-fs temporal resolution should be attainable in experiments The laser-plasma accelerator we have designed is able to produce picocoulomb of charges in the 5 MeV range and with a < 10-fs bunch duration. We show that the beam line is able to provide ≃5-fs bunches with femtocoulomb charge and normalized transverse emittances of εn⊥ ≃ 10–20 nm
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
