Würzburg 2018 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 11: Synchrotron Radiation Sources, Hadron Accelerators and Colliders

AKBP 11.2: Talk

Thursday, March 22, 2018, 16:45–17:00, NW-Bau - HS5

Study of the laser-induced energy modulation amplitude at the short-pulse facility at DELTA — •Arne Meyer auf der Heide, Benedikt Büsing, Shaukat Khan, Nils Lockmann, Carsten Mai, Bernard Riemann, and Boris Sawadski — Center for Synchrotron Radiation, TU Dortmund University, Dortmund, Germany

At DELTA, a synchrotron light source operated by the TU Dortmund University, the short-pulse facility provides ultrashort pulses in the vacuum ultraviolet and terahertz regime based on the seeding scheme coherent harmonic generation (CHG). Here, a laser-electron interaction results in a modulation of the electron energy which is transformed into a density modulation by a magnetic chicane giving rise to coherent emission at harmonics of the laser wavelength.

The amplitude of the energy modulation is measured with different techniques. By introducing a second laser pulse and, thus, a second modulation, the amplitude measurements demonstrate that both laser pulses interact with the same electrons within a bunch. This is a crucial requirement for echo-enabled harmonic generation (EEHG) comprising a twofold energy modulation, which is the goal of a future upgrade of the short-pulse facility.

This project was funded by BMBF (05K16PEA, 05K16PEB), MERCUR (PR-2014-0047) and DFG (INST 212/236-1 FUGG)