Speaker
Description
For certain photonuclear experiments utilizing Compton gamma-ray beams, beam-uncorrelated background poses a significant challenge. At the High Intensity Gamma-ray Source (HIGS), we have developed methods to generate pulsed free-electron laser (FEL) beams by transversely or longitudinally modulating the storage ring FEL. Both methods enable periods of FEL interaction: one by transversely manipulating the electron beam orbit, the other by de-synchronizing the electron and FEL beams. The recently-developed longitudinal method has proven superior: it avoids beam loss and is applicable across a wide range of electron beam energies. In this work, we describe the operational principle of pulsed FEL beam generation using longitudinal modulation, and we present measurements of the macro- and micro-temporal structure of the FEL beam. Furthermore, we present experimental results demonstrating the effectiveness of using a pulsed gamma-ray beam to reduce beam background.
Footnotes
M.W. Ahmed et al. https://doi.org/10.1016/j.nima.2003.08.166.
S.F. Mikhailov et al. https://accelconf.web.cern.ch/IPAC2015/papers/tupma012.pdf
Funding Agency
This work is partially supported by DOE Grant No. DE-FG02-97ER41033.
| Region represented | North America |
|---|---|
| Paper preparation format | LaTeX |
