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Figure 3
Calculated HFM focusing voltages using oversampled data measured with 13 independently powered electrodes (after blocking the beam tails on the mirror ends) and 21 beamlets, obtained by solving the inverse problem directly (squares, least-squares algorithm); using Tikhonov regularization with the L-curve criterion (diamonds) and with the regularization parameter shown by a circle in Fig. 8[link] (solid circles, with residual norm closer to the least-squares results).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 18| Part 6| September 2011| Pages 930-937
doi:10.1107/S0909049511036648
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