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Münster 2002 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 21: Instrumentation and Applications II

HK 21.5: Talk

Tuesday, March 12, 2002, 18:15–18:30, F

Recent Developments at the S–DALINAC — •U. Laier1, W. Beinhauer1, M. Brunken1, M. Gopych1, H.-D. Gräf1, T. Hartmann1, M. Hertling1, S. Kostial1, A. Krassilnikov2, A. Lenhardt1, P. Michel3, M. Platz1, A. Richter1, G. Schrieder1, B. Schweizer1, A. Stascheck1, O. Titze1, S. Watzlawik1, T. Weiland2, and H. Weise41Inst. für Kernphysik, TU Darmstadt — 2Fachgebiet TEMF, TU Darmstadt — 3FZ  Rossendorf — 4TESLA collaboration, DESY Hamburg

We report on new developments and studies at the S–DALINAC. Results of measurements performed at the superconducting cavities which revealed the emission of light in conjunction with field emission are presented. The former concept of a fully digital RF control system was changed to a hybrid system consisting of a fast analog feedback circuit and a DSP-based unit. A fast computer code (V-code) using the model of ensembles to describe the beam properties was implemented to study injector beam dynamics. Diagnostics for transverse beam properties using tomographic techniques have been developed and tested. Compton diodes developed for the bremsstrahlung diagnosis at the S–DALINAC were also used for special measurements at TTFL and at ELBE. A new high energy bremsstrahlung facility was set up to measure the polarizability of the nucleon by Compton scattering and the 169-magic-angle spectrometer was equipped with silicon microstrip detectors for resolution improvement.
 Supported by the DFG (FOR 272/2-1 and GRK 410/2)

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