Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 13: Beschleunigerphysik III (Strahlinstabilitäten I)

HK 13.1: Vortrag

Montag, 4. März 2013, 11:00–11:15, WIL-C207

Investigation of microbunching-instability in energy recovery linacs — •Stephanie Rädel and Atoosa Meseck — Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Berlin, Germany

In an energy recovery linac (ERL), a Photo-injector produces electron bunches with very low emittance und energy spread to feed a superconducting linac section. After the acceleration in the linac, the bunches pass through a transport loop, which for example can include undulators to produce high-brilliance radiation. After the passage through the loop, the bunches pass the linac a second time with a phase shifted by a 180 degree, in this case the linac decelerates the bunches gaining back the energy. The spend bunches are deflected by a dipole magnet to a beam dump. Maintaining the low emittance and energy spread is of major importance in an ERL. Therefore, deep understanding and control of effects which can degrade the emittance and energy spread such as space charge effects are of interest. The microbunching caused by the longitudinal space charge forces can lead to an increase in emittance and energy spread in the arcs of the loop. In this contribution, the impacts of the microbunching instability on the beam quality and its implication for an ERL are discussed.