Characterizing ultralow emittance electron beams using structured light fields

Ultralow emittance electron beams from a laser-wakefield accelerator

Measurements and simulations of ultralow emittance and ultrashort electron beams in the linac coherent light source.

The Linac Coherent Light Source (LCLS) is an x-ray free-electron laser project presently in a commissioning phase at the SLAC National Accelerator Laboratory. We report here on very low-emittance measurements made at low bunch charge, and a few femtosecond bunch length produced by the LCLS bunch compressors. Start-to-end simulations associated with these beam parameters show the possibilities o...

Monoenergetic Electron Beams with Ultralow Normalized Emittance Generated from Laser-gas Interaction *

High quality electron bunches were generated by using 2 TW, 80 fs high contrast laser pulses interacting with helium gas targets. In optimized experimental condition, we got tens of MeV monoenergetic electron beams with small energy spread and the normalized emittance reaches 0.07π mm·mrad. Experimental and simulation results show that proper plasma densities make the injection more stable and ...

Generating ultralow-emittance ion beams in a storage ring.

Laser cooling of heavy-ion beams in a storage ring is systematically studied with a multiparticle simulation code where not only exact lattice characteristics and space-charge forces but also realistic laser-ion interactions can be incorporated. The resonant coupling method is applied in order to extend the powerful longitudinal photon pressure to the transverse degrees of freedom. It is shown ...

Direct Measurement of Sub-10 fs Relativistic Electron Beams with Ultralow Emittance.

Ultralow emittance (≤20  nm, normalized) electron beams with 10^{5} electrons per bunch are obtained by tightly focusing an ultrafast (∼100  fs) laser pulse on the cathode of a 1.6 cell radio frequency photoinjector. Taking advantage of the small initial longitudinal emittance, a downstream velocity bunching cavity is used to compress the beam to <10  fs rms bunch length. The measurement is per...