Action-kick sensitivity to D4 field errors at collision (R0 = 25 mm):

Multipole 	|\Delta J/J\right| (10^{-3})
b_2/a_2		0.29
b_3/a_3		0.032
b_4/a_4		0.0037
b_5/a_5		0.0004
b_6/a_6		0
b_7/a_7		0
b_8/a_8		0
b_9/a_9		0
b_10/a_10	0
b_11/a_11	0

Note:

1. 1 unit multipole error on one set of D4A+D4B dipole

2. beta*=0.5 m; 11 sigma amplitude with zero crossing angle