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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 11: Diagnostics, Syn. radiation and FELs

AKBP 11.4: Vortrag

Mittwoch, 18. März 2020, 10:15–10:30, MOL 213

Developing a coherent radiation direct detection scheme for the SSMB PoP experiment — •Arnold Kruschinski^{1, 2}, Arne Hoehl³, Roman Klein³, Markus Ries¹, and Jörg Feikes¹ — ¹Helmholtz-Zentrum Berlin — ²Humboldt-Universität zu Berlin — ³Physikalisch-Technische Bundesanstalt

The method of Steady-State Microbunching (SSMB) as proposed by Alex Chao and Daniel Ratner in 2010 can be used to generate intense coherent synchrotron radiation at a storage ring. The scheme would allow synchrotron light with brilliance similar to an FEL while enabling high repetition rates typical for a storage ring.

A proof-of-principle experiment is conducted at the MLS storage ring in Berlin, demonstrating stability of a microbunch structure over one turn in the storage ring. So far it has only been possible to detect the coherent synchrotron light at the second harmonic of the laser wavelength. This is because the laser pulse used to imprint a microbunch structure onto the electron beam saturates the detectors, blinding them for the detection of the coherent pulse. A Master's project now aims to also enable a first harmonic detection scheme where Pockels cells are to be used for temporal isolation of the coherent signal appearing 160 ns after the laser pulse.