1. m.apollonioAM1812071 STEPIII – sizes and positioning m.apollonio, Oxford

2. m.apollonioAM1812072 Define current for 207  193 MeV/c Beta evolved with a step-like Pz change Pz=207 MeV/c Pz=195 MeV/c

3. m.apollonioAM1812073 CASE A – absorber in the middle

4. m.apollonioAM1812074 1 mm rad +12% 3 mm rad +0.3% Emi inflation  beta reduction  mismatch Pz = 207 MeV/c +/- 20% 195 MeV/c

5. m.apollonioAM1812075 6 mm rad -2% 10 mm rad -1.7%

6. m.apollonioAM1812076 CASE B – absorber inside the II solenoid

7. m.apollonioAM1812077 1 mm rad +3% 3 mm rad -2.5% Pz = 207 MeV/c +/- 20% 195 MeV/c

8. m.apollonioAM1812078 6 mm rad -3% 10 mm rad -3%

9. m.apollonioAM1812079 R=16 cm @  =42 cm (Pz=200 MeV/c) R=20.7 cm @  =70 cm (centre) NB: radial size to be scaled according to BETA

10. m.apollonioAM18120710 SUMMARY 0. emi growth in vacuum ~ 1% @ 6 mm rad, ~2% @ 10 mm rad a) absorber in the middle reduced cooling (-2% @ 6 mm rad) much easier insertion scheme radial size must be increased (20.7 cm), which could be incompatible with LH FC dimensions b) absorber inside solenoid gives an enhanced cooling (-3% @ 6 mm rad) requires some difficult insertion scheme radial size small (16 cm) and easy to insert LH in FC (a)Poorer performance but much more practical (b)Better performance but not very practical