Figure 6
Ratio \({\sigma }_{y}^{{\rm{off}}}({s}_{1})/{\sigma }_{y}({s}_{1})\) shown as a colour map for various quadrupole focusing strengths of the two quadrupoles, \({K}_{1}\) and \({K}_{2}\). Results from ASTRA simulations with space-charge effects excluded (a) and included (b). The fields were scaled such that each TDS would provide an on-peak voltage deflection of 20 MV, although they are operated at zero-crossing here.
