Preliminary Change Request for the Chromatic Sextupoles and Trim Quadrupole Elements of the SNS Accumulator Ring

In view of the adopted modified design for the 1.3 GeV compatible accumulator ring of the SNS [1], complementary studies have been undertaken, in order to justify the need of high-field chromatic sextupoles for chromaticity correction. Furthermore, as these chromatic sextupoles introduce a first order quadrupole ``feed-down'' effect, the trim quadrupole elements specifications had to be reviewed in order to accommodate this change.