3-D Transient Process Calculations For Fast Cycling Superferric Accelerator Magnets

Fischer, E.; Kurnyshov, R.; Moritz, G.; Shcherbakov, P.

doi:10.1109/tasc.2005.864338

Cited by 10 publications

(4 citation statements)

References 2 publications

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“…Reformulating (7) in fixpoint form and carrying out a Newton discretization leads to (8) involving the Jacobian corresponding to the nonlinear iteration step . The Jacobian reads (9) The entries of are the same as those for except for the fact that the nonlinear reluctivity is replaced by the tensor-valued differential reluctivity (10) with the chord reluctivity and the incremental reluctivity.…”

Section: Linearizationmentioning

confidence: 99%

“…Significant improvements were proposed, in particular the eddy-current losses in the laminated yoke were reduced by modifications to the end regions of the yoke as well as to the coil geometry [7]. In addition, the effect of ferromagnetic hysteresis was estimated, separated into the contributions from the individual parts of the assembly [8]. The results were obtained using ANSYS [9] and were compared to measurements on a test magnet [10].…”

Section: Introductionmentioning

confidence: 99%

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Transient 3D Finite Element Simulations of the Field Quality in the Aperture of the SIS-100 Dipole Magnet

Koch

Gersem

Weiland

2009

IEEE Trans. Appl. Supercond.

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The dipole magnets for the new heavy-ion synchrotron SIS-100, planned within the Facility for Anti-Proton and Ion Research (FAIR) at GSI, Darmstadt, Germany, have to be optimized under certain design requirements. At the intended high beam intensities, the field quality in the aperture is crucial. The geometry of the window-frame magnet featuring superconductive coils was already optimized with respect to the field quality in terms of higher-order multipoles using static 2D and 3D Finite Element (FE) simulations. During fast ramping up to 2 T, however, additional perturbations arise due to local saturation and due to eddy currents in both the yoke and the metallic beam pipe. These have already been investigated using transient 2D FE simulations. In order to further refine these results, a transient nonlinear 3D FE model, capturing the eddy-current effects at the end plates is used. The results are compared to those obtained by static simulations.

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Section: Linearizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transient 3D Finite Element Simulations of the Field Quality in the Aperture of the SIS-100 Dipole Magnet

Koch

Gersem

Weiland

2009

IEEE Trans. Appl. Supercond.

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“…The details of the calculation method as well as similar model analyses and comparison to experimental data are given in [5]. Additional fine lamination slits crossing the main direction of the eddy currents can be used for further loss reduction.…”

Section: Dynamic Properties Of the Sis100 Quadrupolementioning

confidence: 99%

“…10. The overall hysteresis losses were also calculated, using the standard steel properties as given in [5]. The time averaged loss results are summarized in Table IV.…”

Section: Dynamic Properties Of the Sis100 Quadrupolementioning

confidence: 99%

Design of a Superferric Quadrupole Magnet With a High Field Gradient

Kalimov

Fischer

Kurnyshov³

et al. 2006

IEEE Trans. Appl. Supercond.

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FAIR, a new international accelerator complex is now being developed by GSI (Darmstadt, Germany). The synchrotron SIS100 is a part of this complex and will be equipped exclusively with fast-cycling superferric magnets. The magnet system of this accelerator includes 168 identical quadrupoles with a maximum gradient of 33.4 T/m in an elliptical useable aperture of 120 mm 65 mm. An important requirement of the quadrupole design is a field gradient uniformity better than 0.06% for field gradient variation range of 3 T/m-3.3 T/m. This goal is achieved by introducing slots in the central part of the magnet poles, creating the effect of artificial saturation. Simultaneously, these slots reduce the eddy currents in the yoke, induced by the current ramp in the magnet coil. This is important because the whole magnet will be operated near 4.2 K, so the power loss in the yoke should be minimized. Additionally, the shape of the quadrupole pole ends was optimized to provide the necessary integral field quality.

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Finite element calculations on detailed 3D models for the superferric main magnets of the FAIR SIS100 synchrotron

Fischer¹,

Shcherbakov²,

Kurnyshov³

2007

Cryogenics

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3-D Transient Process Calculations For Fast Cycling Superferric Accelerator Magnets

Cited by 10 publications

References 2 publications

Transient 3D Finite Element Simulations of the Field Quality in the Aperture of the SIS-100 Dipole Magnet

Transient 3D Finite Element Simulations of the Field Quality in the Aperture of the SIS-100 Dipole Magnet

Design of a Superferric Quadrupole Magnet With a High Field Gradient

Finite element calculations on detailed 3D models for the superferric main magnets of the FAIR SIS100 synchrotron

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