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MOP076 Integration of Fringe Field Alpha Magnets into the V-Code Beam Dynamics Simulation Tool simulation, dipole, electron, focusing 254
  • S. Franke, W. Ackermann, B. Steiner, T. Weiland
    TEMF, TU Darmstadt, Darmstadt
  • J. Enders, C. Heßler, Y. Poltoratska
    TU Darmstadt, Darmstadt

Funding: This work was partially funded by DESY Hamburg and DFG (SFB 634).
At the Superconducting DArmstadter LINear Accelerator (S-DALINAC) a new 100 keV polarized electron source is currently being installed. Therefore, a new low energy injection concept has to be designed. One of the main components of the injector are a polarized electron source, an alpha magnet and a Wien filter used for spin rotation as well as various beam forming elements. Fast beam dynamics simulations can advantageously assist the design process because of the flexible parameter variations combined with nearly simultaneous solution responses. Based on the moment approach a fast tracking code named V-Code has been implemented at TEMF. In order to simulate the entire injector an alpha magnet model was added to the V-Code database of beam line elements. In this paper a summary of issues regarding the implementation complemented with simulation results will be provided.

TUP054 Development of the Continuously Adjustable Permanent Magnet Quadrupole for ATF2 quadrupole, coupling, dipole, permanent-magnet 524
  • T. Sugimoto, M. Ichikawa, Y. Iwashita, I. Kazama, M. Yamada
    Kyoto ICR, Uji, Kyoto
  • T. Tauchi
    KEK, Ibaraki

A final focus quadrupole (FFQ) doublet of ILC should have excellent properties such as strong focusing, compactness and less vibrations. In a baseline design, superconducting magnet is supposed to be used, which may have some vibrations traveling through liquid helium. It may not be suitable for FFQ of ILC unless the vibration effect is proven to be negligible. Since the five-disc-singlet proposed by Gluckstern satisfies these properties including continuous adjustability, we are developing a FFQ aiming at a beam test at ATF2. Although the x-y coupling effect is carefully cancelled in the design, fabrication errors or rotation errors may break the cancellation. We are estimating the effect of these errors on the beam size at the interaction point. Two methods are currently carried out. The first one is transfer matrix calculations, which neglects fringing field and higher multipole components. The second one is beam-tracking calculation in measured or calculated magnetic field. The fabricated magnet is under adjustment measuring the magnetic field. The recent results will be presented.