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MICE Beamline Status

MICE Beamline Status. m. apollonio. 1. Goals of the BeamLine (and possible actions for improvement). Generate PIONS (TGT) increase dip depth maximise production / capture in 1 st triplet Transport PI to DK solenoid effects of varying DKSol current

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MICE Beamline Status

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  1. MICE Beamline Status m. apollonio MICE VC 127 1

  2. Goals of the BeamLine (and possible actions for improvement) • Generate PIONS (TGT) • increase dip depth • maximise production / capture in 1st triplet • Transport PI to DK solenoid • effects of varying DKSol current • Capture Decay MUs (NB: backward == high purity) • Transport MU to diffuser • Match beam with (future) MICE lattice MICE VC 127 2

  3. Q1 Q2 TOF2 Q3 D1 Q4 Q5 Q6 Q7 Q8 Q9 D2 MICE VC 127 3

  4. -Q2 Q3 f1 f2 Q1-2-3 scan (past run) F x (Q1-Q2-Q3) Q1 GVA1 MICE VC 127

  5. D1 ISIS synchrotron p! Q3 Q2 Q1 Target Upstream Beam-line MICE VC 127

  6. data MC nominal config. Q1-Q2-Q3 scan – US beamline optimisation • Q1-2-3 varied from nominal value • Charged particlescounted downstream of DKsolenoid • Compared to MC • Charged • p-, m-,e- • predict effect for single current changes • verify in the next run • DATA (Friday 13th 2009!) charged p- m- e- MICE VC 127

  7. data MC nominal config. Q1-Q2-Q3 scan – US beamline optimisation • Q1 scan f1-only (MC) DATA p- m- e- MICE VC 127

  8. f2-only (MC) DATA data MC nominal config. Q1-Q2-Q3 scan – US beamline optimisation • Q2 scan p- m- e- MICE VC 127

  9. f3-only (MC) DATA data MC nominal config. Q1-Q2-Q3 scan – US beamline optimisation • Q3 scan p- m- e- MICE VC 127

  10. Muon BeamLine: G4BL simulation – Q1.DS p + ------------ CALC_EMI ------------- + eNT= 0.196 mm rad sx = 4.77 cm sY = 4.55 cm bT = 38397 mm aT = -7.105 RADIUS = 86.73 mm eNx= 0.2448 mm rad bx = 32146 mm ax= 9.68 ex= 0.074 mm rad eNy= 0.1568 mm rad by = 45755 mm ay= -32.9 ey= 0.047 mm rad P=444.71 MeV/c Z=Q1DS rad rad X’ vs X Y’ vs Y mm mm Y vs X MICE VC 127 10

  11. Muon BeamLine: G4BL simulation – TOF0 X’ vs X Y vs X dP/P<10% |dP/P|>10% Y’ vs Y m + ------------ CALC_EMI ------------- + eTN= 2.91 mm rad sX = 4.51 cm sY = 7.02 cm bT = 2874.8618 mm aT = 0.129 RADIUS = 91.4828342 mm eNx= 3.49 mm rad bx= 1400.4 mm ax= 0.489 eX=1.47 mm rad eNy= 2.43 mm rad by= 4867.7 mm ay= -0.392 eY=1.02 mm rad P=250 MeV/c Z=TOF0 MICE VC 127 11

  12. Muon BeamLine: G4BL simulation – TOF1 X’ vs X Y vs X dP/P<10% |dP/P|>10% Y’ vs Y m + ------------ CALC_EMI ------------- + eTN= 2.47 (mm rad) sX = 5.9 (cm) sY = 4.37 (cm) bT = 2334 (mm) aT = 0.86 RADIUS = 75.9 (mm) eNx= 2.60 bx= 2872 mm ax= 1.598 eNy= 2.35 by= 1727 mm ay= 0.039 P=223 MeV/c Z=TOF1 MICE VC 127 12

  13. DKSol SCAN • Rationale • Change DK current •  change optics downstream DKSol • handle for tuning • check data vs MC (our understanding of BL) • ongoing task (unfinished …) MICE VC 127

  14. RUN 1125 DATA (DKSOl SCAN) DATA Run1125(PI+) Ptgt = 336.85 - PD2 = 330.9 MeV/c DKSol = 679A = 3.9T (+0.74T) protons? ~8300 entries ~12000 entries slab hits … MICE VC 127

  15. p m beam line • Rationale • select p u.s. of DKSol with D1 • select m d.s. of DKSol with D2 • back scattered muons == purity MICE VC 127

  16. d.s. BL tuning: match to diffuser m Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Dipole1 Dipole2 DK solenoid p fix D2 fix D1 Pp=444 MeV/c Pm=255 MeV/c Pm=214 MeV/c Pm=208 MeV/c MICE VC 127 16

  17. Optimising the BL – match to diffuser This is the (e,P) matrix http://mice.iit.edu/bl/MATRIX/index_mat.html MICE VC 127

  18. Pdiff = 148 215 256 Ppi (tgt) = 350 190 350 MICE VC 127

  19. Will it work? MICE VC 127

  20. ~29. RUN 1174-1177 – PI- (444MeV/c) MU- (256 MeV/c) at D2 PI- should be here: 30.44 NB: DTmu(256)= DTmu(300) * beta300/beta256 = 28.55 * .943/.923 = 29.13 MICE VC 127

  21. ? PI- should be here: 30.44 RUN 1201 – PI- (336.8MeV/c) MU- (256 MeV/c) at D2 MU- should be the same as before … what is that? MICE VC 127

  22. Not happy with this “optimized” line Feel ONE Ppi for all cases not good Need a thought (== analysis of data) I rescale the central (444  256) case for 400.0  230 336.8  200 Select backward going muons MICE VC 127

  23. Muon BeamLine: G4BL simulation – Diffuser m + ------------ CALC_EMI ------------- + eN= 3.41 mm rad sX = 4.35 cm sY = 4.88 cm bT = 1250 mm aT = -0.0017 RADIUS = 65.3 mm ex= 3.76 mm rad bx= 1004 mm ax= 0.367 ey= 3.10 mm rad by= 1534 mm ay= -0.450 P=214 MeV/c Z=Diffuser MICE VC 127 23

  24. Measuring (e,P) from DATA • Rationale • checking if an optics produces the foreseen (a,b) at diffuser • measure e (and P) of the muon beam • How? • use TOF0 / 1 as (x,y) stations • define muon sample • track mu’s in the Q7-8-9 triplet • infer x’, y’  (x,x’) (y,y’) Mark Rayner’s tools MICE VC 127

  25. a) Monitoring the Run MICE VC 127

  26. e.g. ... (7, 9, 10, … December)PI (444 MeV/c)  MU (258 MeV/c) before new calib MICE VC 127

  27. b) Select muonsc) Compute phase space MICE VC 127

  28. RUN 1408 – P0=400 /PD2=230 selecting the muons MICE VC 127

  29. TOF 0 MICE VC 127

  30. TOF 1 MICE VC 127

  31. ---------------------------------------------------------------------------------------------------------------------------------------------- If muons... x RMS norm emittance = 4.5 mm y RMS norm emittance = 1.8 mm Transverse 4d RMS norm emittance = 2.8 mm MICE VC 127

  32. RUN 1386-1387 – P0=444 /PD2=256 selecting the muons MICE VC 127

  33. G4BL prediction MICE VC 127

  34. TOF 0 X’ vs X Y’ vs Y G4BL MICE VC 127

  35. TOF 1 X’ vs X G4BL Y’ vs Y MICE VC 127

  36. RUN 1409–1411 P0=336.8 /PD2=200 selecting the muons (very broad peak, I kept conservative) MICE VC 127

  37. -------------------------------------------------------------------------------------------------------------------------------------- If muons... x RMS norm emittance = 4.27 mm y RMS norm emittance = 1.77 mm Transverse 4d RMS norm emittance = 2.75 mm MICE VC 127

  38. MICE VC 127

  39. MICE VC 127

  40. Conclusions • After 1 year we are back on DATA taking • target is working • DKSol is ON • We have been collecting data Since September 2009 • Calibrations • Rate vs Target Dip Depth (AD) • Q123 scan • need to understand discrepancies • DKSol scan • analysis in progress • (e,P) matrix measurements • analysis just started, • Mark’s algorithm needs to be tuned • (e,P) optimsed optics do not look handsome  need to be understood and reviewed to some extent MICE VC 127

  41. Plans • Short term • keep taking pi  mu cases to increase statistics) • stick to (-) polarity to avoid rushing • Medium Term (Shutdown) • campaign of measurements of mag fields ? • hysteresis checks (doc is not clear + measurements done at I<Imax) • any other suggestion? • Longer term (>next User’s Run) • review optimisation of the (e,P) matrix • back to (+) polarity and repeat (e,P) data taking MICE VC 127

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