Production of high brightness γ rays through backscattering of laser photons on high-energy electrons
Year: 2003
Type: article
Abstract: Based on the requirements from a conceptual design of a polarized positron beam for future linear colliders, we constructed a special collision system with a short focal length of 150 mm of the laser beams so as to produce $\ensuremath{\gamma}$ rays through inverse Compton scattering. In order to achieve efficient laser-electron collisions, we created a special optics to produce very small ${e}^{\ensuremath{-}}$-beam sizes of ${\ensuremath{\sigma}}_{{e}_{x0}}=7.6\text{ }\ensuremath{\mu}\mathrm{m}$ and ${\ensuremath{\sigma}}_{{e}_{y0}}=5.4\text{ }\ensuremath{\mu}\mathrm{m}$ in the horizontal and vertical directions at the collision point. Using laser light with a wavelength of 532 nm and an ${e}^{\ensuremath{-}}$ beam of 1.28 GeV, provided from the ATF-damping ring at KEK, we generated $2\ifmmode\times\else\texttimes\fi{}{10}^{5}$ $\ensuremath{\gamma}$ rays with a time duration of 26 ps in rms, leading to a peak brightness of $1.7\ifmmode\times\else\texttimes\fi{}{10}^{18}/({\mathrm{mrad}}^{2}\text{ }{\mathrm{mm}}^{2}\text{ }0.1%\mathrm{bandwidth}\text{ }\mathrm{s}$) near to the maximum energy of 56 MeV.
Authors: I. Sakai, T. Aoki, K. Dobashi, M. Fukuda, A. Higurashi, T. Hirose, T. Iimura, Y. Kurihara, T. Okugi, T. Omori, J. Urakawa, M. Washio, K. Yokoya
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W1976258591