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23 April 2024

» arxiv » 0902.2371

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Characterization and Tuning of Ultra High Gradient Permanent Magnet Quadrupoles
S. Becker ; M. Bussmann ; S. Raith ; M. Fuchs ; R. Weingartner ; P. Kunz ; W. Lauth ; S. Schramm ; M. El Ghazaly ; F. Grüner ; H. Backe ; D. Habs ;
Date:	15 Feb 2009
Abstract:	The application of quadrupoles with high field gradients and small apertures requires precise control over higher order multipole field components. We present a new scheme for performance control and tuning, which allows the illumination of most of the quadrupole aperture due to the reduction of higher order field components. Hence, the size of the aperture can be minimized to match the beam size to obtain field gradients of 500 T/m at good imaging quality. The characterization method based on a Hall probe measurement and a Fourier analysis was cross checked using the high quality electron beam at the Mainz Microtron MAMI.
Source:	arXiv, 0902.2371
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