Search Results (2 total)

Electron storage rings of GeV energy with laser pulse stacking cavities are promising intense sources of polarized hard photons which, via pair production, can be used to generate polarized positron beams. In this paper, the dynamics of electron bunches circulating in a storage ring and interacting with high-power laser pulses is studied both analytically and by simulation. Both the common features and the differences in the behavior of bunches interacting with an extremely high power laser pulse and with a moderate pulse are discussed. Also considerations on particular lattice designs for Compton gamma rings are presented.

Closed analytical formulas describing the parameters of x rays, generated in Compton backscattering of laser pulse and electron beam, such as total yield and temporal duration of the x-ray pulse are presented. Despite the fact that maximal yield is attainable at the head-on collisions and the analytical expressions for this specific case were derived, for some technological reasons in the Compton sources, the head-on collision is not acceptable. In “laser wire” monitors the laser beam crosses the electron bunch at the right angle. A model comprising the ellipsoidal laser and electron bunches with tri-Gaussian density distribution is considered. For this model, the total yield of x-ray quanta and temporal duration is derived as functions of the (arbitrary) crossing angle and geometric dimensions of both the bunch and the pulse. As is shown, the yield is maximal for the head-on collision. With increase in the collision angle, the yield diminishes with rate determined by dimensions of the bunches. Duration of the x-ray pulse behaves in a similar way; minimal duration is attained near the back-on collisions.