Superconducting SIS100 Prototype Magnets Test Results and Final Design Issues

Fischer, Egbert; Schnizer, Pierre; Akishin, Pavel; Kurnyshov, R.; Mierau, Anna; Schnizer, Bernhard; Shim, S. Y.; Sherbakov, Petr

doi:10.1109/tasc.2010.2042292

Cited by 17 publications

(7 citation statements)

References 8 publications

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“…The losses were considerably lower than the expected value of 70 W. This is mainly due to the superconducting wire with small filaments and a CuMn matrix [20], and the silicon steel M600-100A. The prediction of 70 W was based on measurements obtained from the model magnets, which were built of M700-100A, as this was readily available when the model magnets were produced [18], [19].…”

Section: A Test Resultsmentioning

confidence: 97%

Fast-Ramped Superconducting Magnets for FAIR Production Status and First Test Results

Fischer

Schnizer

Sugita

et al. 2015

IEEE Trans. Appl. Supercond.

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The SIS100 synchrotron for heavy ion research is based on fast-ramped superconducting magnets. These superferric magnets are being designed, built, and tested. The first 3-m-long series dipole (maximum field of 1.9 T; ramp rate of 4 T/s) has been built. We present the test results obtained (quench training, magnetic field, ac loss, and repetition rate) and compare them with the predicted values and the required operation parameters.

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Section: A Test Resultsmentioning

confidence: 97%

Fast-Ramped Superconducting Magnets for FAIR Production Status and First Test Results

Fischer

Schnizer

Sugita

et al. 2015

IEEE Trans. Appl. Supercond.

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“…The core component, the SIS100 synchrotron, uses periodically fast ramped superconducting magnets, with similar cycle parameters as the magnet lenses used by the Nuclotron. The dipoles are 3.1 m long, and provide a maximum field of 2 T operated at 1 Hz [1]. The injection field is roughly 10% of the maximum field.…”

Section: T He Facility For Antiproton and Ion Research (Fair)mentioning

confidence: 99%

“…Data Treatment 1) Multipoles: The field measured by a rotating coil probe is best described using classical circular multipoles (1) Here with and the Cartesian 2-D coordinates and the reference radius. The higher order harmonics are given by with the main multipole ( for the dipole).…”

Section: A Mole Descriptionmentioning

confidence: 99%

Mole for Measuring SIS100 Magnets Commissioning and First Test Results

Schnizer

Fischer

Kiesewetter

et al. 2010

IEEE Trans. Appl. Supercond.

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The SIS100 synchrotron utilizes fast ramped superconducting magnets operated with a frequency of 1 Hz. The beam pipe is of elliptic aperture and the dipole magnets are curved. Therefore, elliptic and toroidal multipoles were developed which allow describing the field concisely within the whole aperture. A mole (i.e., a measurement system based on a rotating coil probe with all auxiliary components operating within the magnet's field) was developed able to sustain ramp rates of up to 4 T/s. It was tested in the field of a conventional magnet and in the first SIS100 superconducting prototype magnet. We recall general design issues of the mole and describe their advantages. We present the first measurements of the mole on the SIS100 prototype and compare them to the results obtained with an independent system. We outline how the rotating coil probe measurements have to be interpreted in the curved magnet using toroidal multipoles, and possible further improvements of the system. Index Terms-Fast ramped superconducting magnets, field description, magnetic measurement.

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“…In order to improve the magnet performance, extensive experiments and theoretical studies have been carried out on a superconducting magnet system and cryogenic heat losses including the beam tube. [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Secondary magnetic field harmonics dependence on vacuum beam chamber geometry

Shim

Wilfert

Muehle

2013

Phys. Rev. ST Accel. Beams

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The harmonic magnetic field properties due to eddy currents have been studied with respect to the geometry of the vacuum beam chamber. We derived a generalized formula enabling the precise prediction of any field harmonics generated by eddy currents in beam tubes with different cross-sectional geometries. Applying our model to study the properties of field harmonics in beam tubes with linear dipole magnetic field ramping clearly proved that the circular cross section tube generates only a dipole field from eddy currents. The elliptic tube showed noticeable magnitudes of sextupole and dipole fields. We demonstrate theoretically that it is feasible to suppress the generation of the sextupole field component by appropriately varying the tube wall thickness as a function of angle around the tube circumference. This result indicates that it is possible to design an elliptical-shaped beam tube that generates a dipole field component with zero magnitude of sextupole. In a rectangular-shaped beam tube, one of the selected harmonic fields can be prevented if an appropriate wall thickness ratio between the horizontal and vertical tube walls is properly chosen. Our generalized formalism can be used for optimization of arbitrarily complex-shaped beam tubes, with respect to suppression of detrimental field harmonics.

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Superconducting SIS100 Prototype Magnets Test Results and Final Design Issues

Cited by 17 publications

References 8 publications

Fast-Ramped Superconducting Magnets for FAIR Production Status and First Test Results

Fast-Ramped Superconducting Magnets for FAIR Production Status and First Test Results

Mole for Measuring SIS100 Magnets Commissioning and First Test Results

Secondary magnetic field harmonics dependence on vacuum beam chamber geometry

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