1. Re-tuning MICE June 1 st 2010 Tim Carlisle

2. Intro At the moment MICE coil currents optimized for: central Pz = 0 RF No LH2 want to rematch M1 & M2 in Trackers for: central Pz = 9.3 MeV/m RF LH2 TRD: Note #153

3. Wang Coil set-up p=200, beta=42, Wang solenoids matched 11 July 2007 1 -6.0063 0.1106 0.2580 0.3240 -135.1800 2 -5.8582 1.3143 0.2580 0.2793 -152.4400 3-4.5063 0.1106 0.2580 0.3176 -127.3700 4 -4.1508 0.1995 0.2580 0.2878 -137.1300 5 -3.7116 0.2012 0.2580 0.3027 -118.5600 6 -3.0600 0.2100 0.2630 0.3470 -113.9500 7 -2.6500 0.2100 0.2630 0.3470 113.9500 8 -1.5000 0.2500 0.7250 0.8410 96.2100 9 -0.3100 0.2100 0.2630 0.3470 113.9500 10 0.1000 0.2100 0.2630 0.3470 -113.9500 11 1.2500 0.2500 0.7250 0.8410 -96.2100 12 2.4400 0.2100 0.2630 0.3470 -113.9500 13 2.8500 0.2100 0.2630 0.3470 113.9500 14 3.5104 0.2012 0.2580 0.3027 118.5600 15 3.9513 0.1995 0.2580 0.2878 137.1300 16 4.3957 0.1106 0.2580 0.3176 127.3700 17 4.5439 1.3143 0.2580 0.2793 152.4400 18 5.8957 0.1106 0.2580 0.3240 135.1800 Cooling lattice Matching coils M2, M1 Matching coils M1’, M2’

4. Method

5. Code Test 200 MeV/c No RF No LH2 Matched beta in 2 nd tracker. 42cm in LH2 centres i.e. TRD spec

6. Stage 1 α 0 β 0 γ 0 α β γα β γ

7. Summary First still need a periodic Beta fn in cooling lattice. Stage 2 : optimize M1’ & M2’ to get a matched beam in the 2 nd tracker. Stick into G4MICE, see effect on beam and cooling.