24-30 September 2017
La Biodola, Isola d'Elba
Europe/Rome timezone

Demonstration of cascaded pre-bunching for enhanced particle trapping in an Inverse Free Electron Laser accelerator

28 Sep 2017, 18:00
SB2, Sala Bonaparte 2, HH

SB2, Sala Bonaparte 2, HH

talk WG3 - Electron Beams from Electromagnetic Structures, Including Dielectric and Laser-driven Structures WG3_Parallel


Mr Nicholas Sudar (University of California, Los Angeles)


We present results of an experiment performed at Brookhaven National Lab's Accelerator Test Facility showing the first successful demonstration of a cascaded pre-bunching scheme. Two modulator-chicane pre-bunchers arranged in series and a high power CO2 laser seed tailor the longitudinal phase space of a 52 MeV electron beam creating a series of dense micro-bunches. Injecting this bunched beam in the stable accelerating potential of a seeded, strongly tapered undulator interaction increases the trapping fraction from 25\% to 95\%, accelerating up to 80\% of the particles to the final design energy. These results represent an important step in the development of high efficiency tapered undulator interactions, both as advanced accelerators and as high peak and average power coherent radiation sources.

Primary author

Mr Nicholas Sudar (University of California, Los Angeles)


Dr Christina Swinson (Brookhaven National Lab) Dr Igor Pogorelsky (BNL) Ivan Gadjev (UCLA PBPL) Dr Mikhail Fedurin (Brookhaven National Laboratory Accelerator Test Facility) Dr Mikhail Polyanskiy (Brookhaven National Lab) Prof. Pietro Musumeci (UCLA) Dr Yusuke Sakai (University of California, Los Angeles)

Presentation Materials