September 2006 issue
Cover illustration: Stable top-up operation has been attained at SPring-8 (see Tanaka et al., pages 378-391). Top: an advantage of top-up operation with regard to structural analysis of disordered materials. Clear accuracy-improvement of the calculated total structure factor S(Q) and total correlation function T(r) by top-up operation can be seen. Middle: schematic image of stored-beam oscillation-free injection. Bottom: beam current stability in the top-up operation (left) compared with conventional operation (right).