Solid design FOM

<math>A = A_{PV} \left[1 + \beta_{HT}\frac{1}{(1-x)^3 Q^2} + \beta_{CSV} x^2 \right]</math>

Uncertainties

Magnet	A		bHT		bCSV		Notes
BaBar	0.3%		0.0026		0.017		Proposal, 30 slits
BaBar	0.28%		0.0024		0.020		30 slits
Zeus	0.27%		0.0028		0.022		30 slits, full field integral, max ang 28.6 deg