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Compact and strong window core steering magnets with homogeneous dipole field

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A Correction to this article was published on 09 November 2021

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Abstract

A typical axially compact, square window core steering magnet has a very small 2D good field region (GFR) of 18% of the iron core aperture. It is weak with 85% of its dipole in the fringes. Increasing the current fed area (coil) to increase the dipole strength lowers the good field zone. Some novel and simple coil shapes can expand their 2D/3D GFR to 94/40% of the iron aperture. They are axially compact, i.e., stronger with 60–65% of the dipole in fringes. The reduction in error sextupole field is more profound. A novel 2D coil shape with vanished 2D sextupole proves the concept. For axially short cores, a gap between the coil and the iron aperture can increase the 3D sextupole, missing in 2D simulations. A new asymmetric one-axis steering magnet core and coil shape with high dipole field and homogeneity is also given. The new, practical coil shapes significantly improve the dipole field homogeneity and strength of these magnets.

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Acknowledgements

The author is extremely thankful to Kailash Ruwali for the rotating coil measurements and Pranabesh K Thander for guidance to use a Linux server for the FEA work. He also thanks Kailash Ruwali for the quadrupole data, Subrata Das for the dipole data and Kamal K Pant for his encouragement and support for the experimental work.

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Authors and Affiliations

  1. Free Electron Laser and Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore , 452 013, India

    Bhaskar Biswas

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  1. Bhaskar Biswas
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Correspondence to Bhaskar Biswas.

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Biswas, B. Compact and strong window core steering magnets with homogeneous dipole field. Pramana - J Phys 94, 155 (2020). https://doi.org/10.1007/s12043-020-02013-9

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  • DOI: https://doi.org/10.1007/s12043-020-02013-9

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