IPAC'23 - Student Poster Session Guide

IPAC’23 / STUDENT POSTER SESSION GUIDE 45 Student Poster Session SUPM084 Developing a Two-Colour All-Fibre Balanced Optical Cross- Correlator for Sub-Femtosecond Synchronisation Jonathan Christie (The University of Liverpool) . Edward Snedden, James Henderson (Science and Technology Facilities Council), Laura Corner (Cock- croft Institute). In modern accelerator facilities, femtosecond synchronisation between an optical master oscil- lator (OMO) that provides facility-wide timing pulses and an external experiment laser is need- ed to achieve the few-fs resolution required for experiments such as pump-probe spectros- copy. This can be achieved with a balanced optical cross-correlator (BOXC), which determines the timing delay between two laser pulses via the generation of sum-frequency radiation in a nonlinear crystal. In this paper, a design for a two-colour fibre-coupled BOXC using waveguided periodical- ly-poled lithium niobate (PPLN) crystals is presented. An all-fibre two-colour BOXC is highly desirable as it would be more robust against environment fuctuations, easier to implement, and can achieve greater synchronisation performance compared to free-space coupled BOXCs that are currently used in accelerator facilities. This proposed design can theoretically achieve 5 - 10 times greater sensitivity to relative timing changes between laser pulses than current free-space two-colour BOXCs, which can make sub-fs synchronisation between an OMO and an external experiment laser of different wavelength achievable. SUPM085 Machine learning-based reconstruction of electron radiation spectra Monika Yadav (The University of Liverpool) . Brian Naranjo, Gerard Andonian, James Rosenzweig, Maanas Oruganti, Sarah Zhang (University of California, Los Angeles), Carsten Welsch, Oznur Apsimon (The University of Liverpool). The photon fux resulting from a high energy electron beam’s interaction with a target, such as in the upcoming FACET-II experiments at SLAC National Accelerator Laboratory, should yield, through its spectral and angular characteristics, information about the electron beam’s under- lying dynamics at the interaction point. This project utilizes data from simulated plasma wakefield acceleration-derived betatron radia- tion experiments and high-field laser-electron-based radiation production to determine which methods could most reliably reconstruct these key properties. The data from these two cases provide a large range of photon energies; this variation of photon characteristics increases con- fidence in each analysis method. This work aims to compare several reconstruction methods and determine which best predicts original energy distributions based on simulated spectra.