IPAC'25 - the 16th International Particle Accelerator Conferece

Initial results of the radiation diagnostic system as part of PAX at FACET-II

TUPS008

3 Jun 2025, 16:00

2h

Exhibiton Hall A _Salmon (TWTC)

Poster Presentation MC3.A22 Plasma Wakefield Acceleration Tuesday Poster Session

Speaker

Rafi Hessami (SLAC National Accelerator Laboratory)

Description

The ongoing Plasma-driven Attosecond X-ray source experiment (PAX) at FACET-II aims to produce coherent soft X-ray pulses of attosecond duration using a Plasma Wakefield Accelerator*. These kinds of X-ray pulses can be used to study chemical processes where attosecond-scale electron motion is important. PAX has completed the installation of a spectrometer system able to measure radiation produced by the electron beam in the wavelength range of 50 nm – 1050 nm. In this contribution we discuss the initial use of this spectrometer system to measure dipole radiation, as well as the use of those results to reconstruct the longitudinal beam profile and spot size. We additionally demonstrate the utility in dipole radiation measurements as a diagnostic for short, 10s of nm beams, allowing for non-intercepting bunch length measurements with resolution limited by the range of wavelengths observed, allowing for features and current spikes on the scale of few nanometers to be measured.

Footnotes

*C. Emma, X.Xu et al APL Photonics 6, 076107 (2021)