Calculation of Thomson scattering of intense lasers from electron beams at different interaction angles

Abstract

Recently there has been considerable interest in the Thomson scattering of intense laser from relativistic electron beams, and a new kind of x-ray source named laser synchrotron source (LSS) has been discussed based on this mechanism which is expected to have extremely good performances. In order to verify this theory, an experiment is going to be carried out by our group using a frequency-doubled yttrium–aluminum–garnet laser and a 25 MeV electron beam generated by the accelerator in the Applied Department of the Institute of High-Energy Physics. In this article some theoretical results have been calculated for this experiment, including the scattered x-ray’s wavelength and intensity distribution. The results at 180° and 90° have been given and the 180° result should be very close to the experimental geometry of 178.5°. In Sec. III, figures of the spatial distribution of x-ray are drawn. The future of LSS is prospected finally in Sec. IV.

A High-Energy, Ultrashort-Pulse X-Ray System for the Dynamic Study of Heavy, Dense Materials

“…Numerous articles studying the properties of Thomson scattering from a relativistic electron beam have been published [41][42][43][44][45][46][47][48][49][50][51][52] , focusing on different aspects of both linear and non-linear…”

“…For our experiments, the main known and measured values are: Dt l < 2 ps for the measured laser pulse duration, as streaked by the camera; Dt e < 2 ps for the optical light flashes produced by the photoelectron beam; finally, Dt ls = 60 ps is the timing jitter measured between the streak camera and the uv laser pulses. Clearly, this last contribution dominates in (44), and limits the accuracy of our measurement of the timing jitter between the photoelectrons and the incident uv laser pulses: if the width of the Gaussian statistical distribution can be estimated to within a relative accuracy, e, it is easily seen that the corresponding precision on the timing jitter will be of the order of † 2e . In our case, e ≈ 5% and the minimum value of Dt le that can be measured reliably is approximately equal to † 2e Dt le = 19 ps.…”

<title>Development of an ultrashort table-top electron and x-ray source pumped by laser</title>

“…Subnanosecond and picosecond resolutions have been achieved in electron diffraction experiments by using ultrashort laser driven photocathodes and in xray diffractixi experiments using laser-produced plasma as the x-ray source.4'5 Hard x-ray source with subpicosecond resolution is now possible using femtosecond laser driven plasma or Thomson effect. 6 For most of applications, electron and…”