Dresden 2014 – scientific programme

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BE: Beschleunigerphysik

BE 13: Beam Dynamics and Fields II

BE 13.8: Talk

Thursday, April 3, 2014, 11:30–11:45, ZEU 255

Future experiments on beam break up at the S-DALINAC* — •Thorsten Kürzeder, Florian Hug, Lars Jürgensen, and Norbert Pietralla — Institut für Kernphysik, TU Darmstadt, Darmstadt, Germany

The superconducting accelerator S-DALINAC provides electron beams of up to 130 MeV for nuclear physics experiments at the Technische Universität Darmstadt. It consists of a 10 MeV injector and a 40 MeV main linac cryostat, where 20-cell SRF cavities are operated at 3 GHz in 2 K liquid helium. Two recirculation paths provide the possibility to use the main linac up to three times. Due to transverse beam break up (BBU) the design beam current of 20 µA could not be reached in recirculating operation mode yet, the highest stable beam current obtained so far accounts for 5 µA, which is sufficient for the nuclear physics experiments carried out at Darmstadt. On the other hand the very low threshold current for the occurance of beam break up gives a unique opportunity for testing different strategies of avoiding BBU in a recirculating linear SRF accelerator. We report on upcoming experiments which will be carried out at the S-DALINAC for that purpose. *Work suported by BMBF through 05K13RDA.