Phys. Rev. ST Accel. Beams 12, 102801 (2009) [7 pages]Characterization and tuning of ultrahigh gradient permanent magnet quadrupoles
S. Becker1 *, M. Bussmann2, S. Raith1, M. Fuchs1, R. Weingartner1, P. Kunz3, W. Lauth3, U. Schramm2, M. El Ghazaly3, F. Grüner1,4, H. Backe3, and D. Habs1 Received 13 February 2009; published 19 October 2009 The application of quadrupole devices 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 device aperture because of the reduction of higher order field components. Consequently, the size of the aperture can be minimized to match the beam size achieving field gradients of up to 500 T m-1 at good imaging quality. The characterization method based on a Hall probe measurement and a Fourier analysis was confirmed using the high quality electron beam at the Mainz Microtron MAMI. ©2009 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevSTAB.12.102801 * Corresponding author. stefan.becker@physik.uni-muenchen.de [ Abstract | Previous article | Next article | Issue 10 ] |
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