Dresden 2014 – scientific programme

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BE: Beschleunigerphysik

BE 15: Beam Dynamics and Fields III

BE 15.3: Talk

Thursday, April 3, 2014, 15:45–16:00, ZEU 255

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

In an Energy Recovery Linac (ERL), an electron bunch is accelerated during the first passage through a linac. After the usage (radiation generation or collider-experiments) the spent electron beam passes the linac a second time with a phase shift of 180 degree and is decelerated. This way the energy can be recovered. In an ERL the preservation of the low emittance and small energy spread is of major importance. 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, on the one hand to an increase in emittance and energy spread in the arcs of the loop. On the other hand it can be used to generate coherent high brightness radiation. In this contribution, utilizing BerlinPro as an example, the impacts of the microbunching instability on the beam quality and its implication for an ERL are discussed.