Open AccessTransverse-to-longitudinal emittance-exchange in optical wavelength
Author(s) -
Xiaofan Wang,
Chao Feng,
Chuan Yang,
Li Zeng,
Zhentang Zhao
Publication year - 2020
Publication title -
new journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.584
H-Index - 190
ISSN - 1367-2630
DOI - 10.1088/1367-2630/ab8e5d
Subject(s) - thermal emittance , physics , transverse plane , optics , laser , wavelength , electron , cathode ray , beam (structure) , beam emittance , nuclear physics , structural engineering , engineering
Emittance exchange is a promising technique for next-generation accelerator-based applications. A novel technique is proposed in this paper to exchange emittance of the electron beam between transverse and longitudinal planes in optical wavelength. The emittance exchange configuration consists of a dual-tilted-laser modulator sandwiched by two identical doglegs. Analytical and simulation results demonstrate that the emittance exchange for the electrons at the zero-crossing phase of each laser cycle can be easily achieved with this technique. The proposed technique is quite promising for improving the performance of compact high-gain free-electron laser facilities. Meanwhile, it holds the feasibility to flexibly tailor a beam’s longitudinal shape in the optical scale.