Electron-Beam-Based Sources of Ultrashort X-ray Pulses

ANL/APS/LS-320 Electron beam-based sources of ultrashort x-ray pulses

A review of various methods for generation of ultrashort x-ray pulses using relativistic electron beam from conventional accelerators is presented. Both spontaneous and coherent emission of electrons is considered. Introduction The importance of the time-resolved studies of matter at picosecond (ps), femtosecond (fs), and atttosecond (as) time scales using x-rays has been widely recognized incl...

Tailored-Beam Ultrashort Laser Pulses

Laser pulses with picosecond and femtosecond durations are now indispensable tools in many scientific disciplines. These ultrashort pulses provide unique temporal resolutions for investigations of phenomena taking place in comparable time ranges. In addition, optical energies squeezed into such short time windows yield extremely high peak powers and intensities, paving the way to generate unpre...

Interaction of Ultrashort X-ray Pulses with Material

Producing ultrashort, ultraintense plasma-based soft-x-ray laser pulses by high-harmonic seeding

Simulations show that intense plasma-amplified pulses of 100 fs duration and below are feasible by seeding specifically tailored plasma with an ultrashort pulse of high harmonic radiation. Seeding overcomes gain narrowing by driving amplifying media into saturation earlier, and compensates for reduced gain resulting from boosting the lasing transition linewidth. We conclude that ultrahigh inten...

Attosecond x-ray pulses produced by ultra short transverse slicing via laser electron beam interaction

We propose a method of generation of ∼115 attosecond x-ray pulses in a free electron laser (FEL) by means of producing ultra-fast angular modulation of the electron trajectories prior to entering the FEL. For this modulation, we employ a few-cycle laser pulse in a higher-order Gaussian mode and with carrier-envelope phase stabilization.