Attendees : M. Blaskiewicz, , A. Fedotov, A. Jain, Y. Y. Lee, N. Malitsky, W. Meng

 W. McGahern D. Raparia, G. Parzen, S. Tepikian, N. Tsoupas,  P. Wonderer, J. Wei, S. Y. Zang

Y. Y. Lee showed calculation for 21Q40 quad shimming, 1 Mil should reduce the ITF spread to

+/- 2E-4 for string of 12 quads, if needned.

Meng presented simulation for quad-corrector interferences (1) (2), (3)

Jackson presented the measurement result for quad -dipole corrector ,

simulation 0.25% lower ITF, (in presence of corrector 8 inch away)

Measurement 0.22% lower ITF with 0.02% error