Ultimate parameters of the photon collider at the international linear collider

Pramana

V I Telnov1¹ 

[1] Budker Institute of Nuclear Physics, 630090 Novosibirsk, Russia$$

关键词: Photon collider;    linear collider;    gamma gamma;    photon photon;    photon electron;    Compton scattering.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

At linear colliders, the 𝑒+ 𝑒- luminosity is limited by beam-collision effects, which determine the required emittances of beams in damping rings (DRs). In 𝛾 𝛾 collisions at the photon collider, these effects are absent, and so smaller emittances are desirable. In the present damping ring designs, nominal DR parameters correspond to those required for 𝑒+ 𝑒- collisions. In this note, I would like to stress once again that as soon as we plan the photon collider mode of ILC operation, the damping ring emittances are dictated by the photon collider requirements - namely, they should be as small as possible. This can be achieved by adding more wigglers to the DRs; the incremental cost is easily justified by a considerable potential improvement of the 𝛾 𝛾 luminosity. No expert analysis exists as of now, but it seems realistic to obtain a factor five increase of the 𝛾 luminosity compared to the `nominal' DR design.

【 授权许可】

Unknown