m. apollonio 7/7/2010CM27 - RAL11 Beam-Line Analysis …

7/7/2010CM27 - RAL22 what a summer …  target dips into ISIS …  particle triggers  1500 runs  16 hours shift rotas  MOMs  BLOCs  experts  and to finish with …  … fireworks at 10V ! VERY IMPORTANT: system was really stable, reliable And it looks like data are in good shape

7/7/2010CM27 - RAL3 The MICE Beam-Line

7/7/2010CM27 - RAL4 (x0,y0)(x1,y1) M: transfer matrix Infer x0’ and x1’ from x0,x1 Reconstruct: - P - phase space - Twiss Parameters - emittance TOF0 and 1 play a crucial role in this analysis TOF (0,1,2)

7/7/2010CM27 - RAL5 OnLine Phase Space Reconstruction Beam Line Online Tuning Tried also an OL optimisation (very slow)

7/7/2010CM27 - RAL6 Analysis - Commissioning and calibrating the beam line detectors a)Luminosity Monitor b)TOF0, 1, 2 / CKOVa, b c)FermiLab Beam Profile Monitors - Commissioning the BL magnets - determine the (e,P) matrix - compare data to simulation - Beam rate vs Target Depth Procedure: - data taking campaign at many different optics - mainly scan of quadrupoles/triplets to study the effect on ph-space - scan of DS - monitoring of main scalers / detectors (TOFs) - Use of Reference Runs to monitor optics stability - mu- / mu+ configurations

DS scan [E. Chng, IC] DS current reference at 669 Amps(run 2200) DS current varied from -15% to +20% TofTree and TofTrace ran on data to extract mean of x,y and the spread of the beam (σ) at TOF1 Run Number Current / Amps Ref. Current 7/7/2010CM27 - RAL7

7/7/2010CM27 - RAL8 Beam Characterization [M. Rayner] - Cumulative spectrum of Dt - Comparison Feb./Aug. TOF Calibrations - Change in shape due to TOF0 Partially “blind” & BL dispersion e-/e+ peak monitoring - position & width should be stable

7/7/2010CM27 - RAL9 Few points: - a shift in calibration (10 ps) between Feb. and Aug. - RMS nearly constant: 120 ps ≠ (60 ⊕ 50) - so we are not exploiting the full potential of TOFs resolution

7/7/2010CM27 - RAL10 M.R. Feb. calibration Aug. calibration E.C. Same pattern, shift of 0.5 ns due to wrong calib file used (debugging now) E.C. gauβ fit To e- peak

7/7/2010CM27 - RAL11 Beam Characterization [R.R.Fletcher] - Neutral Particles responsible for an apparent Trigger inefficiency BL+ with D2=0 BL+ with D2 ON

7/7/2010CM27 - RAL12 Beam Characterization [A.Dobbs] - Adam had a chance at 10 V … and he did not miss it! - soon in a MICE-note

7/7/2010CM27 - RAL13 Quadrupole Scan(s) [S. Blot] Q789 (- / +) and Q456 (+) I(triplet) = 050% to 175% of the nominal value See effect on beam profiles and phase space

7/7/2010CM27 - RAL14 Q789 (-) G4BeamLine DATA

7/7/2010CM27 - RAL15

7/7/2010CM27 - RAL16

7/7/2010CM27 - RAL17

7/7/2010CM27 - RAL18 MC (G4Beamline) DATAM Phase Space study for some Matrix Points

7/7/2010CM27 - RAL19 MC (G4Beamline) DATAM

7/7/2010CM27 - RAL20 DATA M G4Beamline P=[200,210] P=[210,220] P=[220,230] P=[230,240] P=[210,220] P=[220,230] P=[230,240] ??? This result is in disagreement with what found previously … needs some investigation

7/7/2010CM27 - RAL21 Many matrix points have been produced which need to be analysed In particular for (6,200) we have: M0 (starting optics) M1 (GA optimisation) M2 (Minuit Optimisation)

7/7/2010CM27 - RAL22 A small army is fighting through the data My apologies if I forgot some name) I am sure more want to be involved. Good agreement DATA vs G4BeamLine (apart from the last result shown) BUT still a lot of work - Many people involved in the analysis of these data (MA, SB, CR, MR, EC, …) -We need - to analyze DATA and produce simulations for … 1500 runs ! (surely less than that but quite a number) -TOF0-1 distance CRUCIAL for P and ph-space reconstruction - At present we could be wrong by cm - TOF0,1 exact location? - survey in due course

7/7/2010CM27 - RAL23 Homework for the 6 months to come - Complete the analysis of the JUL-AUG campaign - Understand how well we can predict the beamline M. Littlefield is modeling the entire beamline in G4MICE Interesting project: should help us understand TOF PH-SPACE reconstruction

7/7/2010CM27 - RAL24 The end

7/7/2010CM27 - RAL25 STEP I - Commissioning and calibrating the beam line detectors a)Luminosity Monitor b)TOF0, 1, 2 / CKOVa, b c)FermiLab Beam Profile Monitors - Commissioning the BL magnets - determine the (e,P) matrix - compare data to simulation -

7/7/2010CM27 - RAL26 Layout - Goals for STEP I - MICE Beam Line - detectors - DAQ - Beam Characterization - data taking campaign - Tracker for the next phase - Software

7/7/2010CM27 - RAL27 Luminosity Monitor - Particle Rate close to Target point - PoT as function of Target Depth (independent from BLMs) - installed in the ISIS vault and commissioned - coincidence to reduce spurious counts - correlation LM vs BLM