The optics of the beam extraction section of SNS ring has been published in Ref.[1] where we show that by optimizing the aperture and locations of the extraction kickers, we can accomplish both, first the elimination of the beam losses for the circulating and extracted beam, and second the minimization of the required voltage applied to the coil of the extraction kickers which deflect the beam vertically to the correct location to clear the extraction septum [2]. Also a number of papers have been published [2,3…10] to discuss the extraction devices (Kickers and Extraction Septum) of the SNS ring. Mechanical constraints however at the location of the SNS extraction kickers required that all fourteen extraction kickers be moved downstream in the ring by five centimeters. In this Technical Note we present the new optics of the SNS extraction region. The results of the study show that the placements of all the extraction kickers by five centimeters downstream can generate the required beam extraction conditions by simply raising the voltage of some of the kickers by about 2% of their original settings.
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