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m. apollonio MICE Beamline summary
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- Beamline parallel session (June 1 st ): - envisaged goals (Alain) - assess readiness of the line magnet status (Ken) - new target (Jason) - optics (MA) - diffuser (John) - ( ,P) matrix readiness 2June 3 rd 2009MICE CM24 - RAL2
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STEPI: - setup optics for rate, then rate for every set-up needed for the ( ,P) matrix - establish optimal momentum setting. - understand purity. - optimize beam rate to beam loss. STEP II: - commission tracker in beam - practice diffuser - precise emittance measurement - then all points of the ( ,P) matrix. In the process -- establish alignment and possible need for correctors etc. -- commission MICE DAQ, C&M, TOF2 & Lumi monitor (from A. Blondel) envisaged goals magnet readiness target diffuser optics conclusions 3June 3 rd 2009MICE CM24 - RAL3
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envisaged goals magnet readiness target diffuser optics conclusions 0. soak test 1.commission target 2.commission DKSol – operate at 500 mV beam loss. Begin with BL @ D1=D2 3.Q1-3 + DKSol optimisation: maximise GVA1/TOF0 rate for P (TOF0)=350 MeV/c (record ISIS BLM + Lumi Mon) 4.e+ beam for calibrations P=100 MeV/c: use magic tables 5.re-establish a beam with P=200 MeV/c align beam 6.TOF0 calibrations done commission (350 MeV/c pion/200 MeV/c muon) beam. Optimize on DKS excitation. Scan P(muon) 7.Develop 200 MeV/c muon beam with “6 mm emittance” beam setup. Evaluate beam parameters and emittance of muon beam at TOF1 with TOF0 and TOF1 (*) 8.Complete generation of beams for momentum-emittance matrix Work Plan (*) evaluation of emittance in MICE requires STEPII 4June 3 rd 2009MICE CM24 - RAL4
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conventional magnets (to do list) - Q1-2-3: - re-connect vacuum box / re-establish water flow / test - D1 - re-positioning / piping connection / electrical re-connection - D2 - in position: needs fine positioning / pipe re-connection / electric re-connection / pressure reducing valves fitting - Q4-5-6 - water and power connections / fit pressure reducing valves - Q7-8-9 - ready to go DK Solenoid - IT WORKS ! (M. Courthold, 2009 a.d.) [ (Archimedes, circa 250 b.c.)] - tested at 5T (870 A) for an hour - max I = 1000 A - needs long run (24 hrs) at 5T - goal: being ready by end of August/beginning of September (tight!) (from K. Longl) Conventional magnet system: – D2, Q6—Q9 will be re-established before the shutdown – Q1—Q3, D1 will be re-established during the shutdown Decay solenoid: – Schedule to complete magnet testing and final acceptance running of Linde frig planned in detail – Plan includes preparation of documentation envisaged goals magnet readiness target diffuser optics conclusions 5June 3 rd 2009MICE CM24 - RAL5
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NEW TARGET production - impressive progress - still a lot to do - end of July to have assemblies ready - then tests - end of August readiness still very achievable BUT tight ! (from J. Tarrant) envisaged goals magnet readiness target diffuser optics conclusions 6June 3 rd 2009MICE CM24 - RAL6
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some mechanical changes to cope with: - air pressure / flow - weight control ! air-motor overruns need tests / understanding ASPIRATIONAL SCHEDULE to have diffuser tested in Oxford: 2 / 3 months (hols excluded) if NO nasty surprises (from J. Cobb) envisaged goals magnet readiness target diffuser optics conclusions 7June 3 rd 2009MICE CM24 - RAL7
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D1 D2 Q4 Q1 Q2 Q3 Q5Q6Q7Q8Q9 envisaged goals magnet readiness target diffuser optics conclusions [fingers crossed] 8June 3 rd 2009MICE CM24 - RAL8 “detectors come and go, please just let me know“
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Muon BeamLine: G4BL simulation – Q1.DS + ------------ CALC_EMI ------------- + T= 0.196 mm rad x = 4.77 cm Y = 4.55 cm T = 38397 mm T = -7.105 RADIUS = 86.73 mm x= 0.2448 mm rad x = 32146 mm x= 9.68 x= 0.074 mm rad y= 0.1568 mm rad y = 45755 mm y= -32.9 y= 0.047 mm rad P=444.71 MeV/c Z=Q1DS X’ vs XY’ vs Y Y vs X mm rad envisaged goals magnet readiness target diffuser optics conclusions 9June 3 rd 2009MICE CM24 - RAL9
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Muon BeamLine: G4BL simulation – TOF0 Y vs X P/P<10% P/P|>10% + ------------ CALC_EMI ------------- + N= 2.91 mm rad X = 4.51 cm Y = 7.02 cm = 2875 mm = 0.129 RADIUS = 91.4828342 mm x= 3.49 mm rad x= 1400.4 mm x= 0.489 eX=1.47 mm rad y= 2.43 mm rad y= 4867.7 mm y= -0.392 eY=1.02 mm rad X’ vs X Y’ vs Y envisaged goals magnet readiness target diffuser optics conclusions 10June 3 rd 2009MICE CM24 - RAL10 P=250 MeV/c Z=TOF0
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+ ------------ CALC_EMI ------------- + N= 2.47 mm rad X = 5.9 cm Y = 4.37 cm T = 2334 mm T = 0.86 RADIUS = 75.9 mm x= 2.60 x= 2872 mm x= 1.598 y= 2.35 y= 1727 mm y= 0.039 P=223 MeV/c Z=TOF1 envisaged goals magnet readiness target diffuser optics conclusions Y vs X P/P<10% P/P|>10% X’ vs X Y’ vs Y Muon BeamLine: G4BL simulation – TOF1 11June 3 rd 2009MICE CM24 - RAL11
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+ ------------ CALC_EMI ------------- + = 3.41 mm rad X = 4.35 cm Y = 4.88 cm T = 1250 mm T = -0.0017 RADIUS = 65.3 mm x= 3.76 mm rad x= 1004 mm x= 0.367 y= 3.10 mm rad y= 1534 mm y= -0.450 P=214 MeV/c Z=Diffuser envisaged goals magnet readiness target diffuser optics conclusions Y vs X P/P<10% P/P|>10% X’ vs X Y’ vs Y Muon BeamLine: G4BL simulation – Diffuser 12June 3 rd 2009MICE CM24 - RAL12
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Optics: are we ready? (shutdown 17 Aug/1 Sept) 2Sept – 25 Oct - On Sept 2 nd we don’t need a beam matched to … something - We can use optics for =6 mm rad / P=214 MeV/c [STEPII] - Rescale it to other momenta to cover STEPI - later (>october) we need a properly matched beam for all the config. of STEPII [trk-solenoid + diffuser] matrix completion - more work needed to tune DS-BL (Q4-9) to match MICE optics - we may want to test solenoid at B+/- B to increase rate 3 6 10 140 200 240 envisaged goals magnet readiness target diffuser optics conclusions 13June 3 rd 2009MICE CM24 - RAL13
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are we ready? XY (a) well defined problem know in solenoid know at US-diffuser -line tuned ( =6,10 mm rad, P=214 MeV/c) as case (a) but beam diverges due to absence of solenoid SUGGESTION: use case (a) tuning STEP II Q7Q8Q9 Q7Q8Q9 STEP I envisaged goals magnet readiness target diffuser optics conclusions 14June 3 rd 2009MICE CM24 - RAL14
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Q4 Q1 Dipole1 DK solenoid Q2Q3 Dipole2 Q5Q6Q7Q8Q9 1) beamline momentum tuning P =208 MeV/c P =444 MeV/c P =214 MeV/c fix D1 fix D2 2) beamline quadrupole tuning P =255 MeV/c envisaged goals magnet readiness target diffuser optics conclusions 15June 3 rd 2009MICE CM24 - RAL15
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Q4 Q1 Dipole1 DK solenoid Q2Q3 Dipole2 Q5Q6Q7Q8Q9 INPUT: beamline US section >>>>>>>>> GA procedure - Define 6-genes genotypes: Q4-5-6-7-8-9 currents - Express it as a phenotype: the Twiss parameters at some Z’s - Evaluate phenotype’s fitness - Mate genotypes and produce new individuals - Choose the best & repeat for several cycles GA+Turtle Optimiser OUTPUT: Twiss parameters @ diffuser US face (+TOF1) envisaged goals magnet readiness target diffuser optics conclusions 16June 3 rd 2009MICE CM24 - RAL16
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envisaged goals magnet readiness target diffuser optics conclusions =78 cm =132 cm =0.4 =0.2 June 2 nd 2009MICE CM24 - RAL17June 3 rd 2009MICE CM24 - RAL17
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- The successful commissioning of the beamline is a combination of hardware and optics optimisation - Assume target is working - Assess magnet readiness - 5T to cover up to high P (MAX=240 MeV/c) - Ongoing work to complete STEPII matrix - Redefining p energy (350 @ TOF0 instead of 420) to cover all the cases - Optics for STEPI == STEPII - Detector readiness - assume TOF0,1 + GVA1 + Ckova,b + FLMons in place and alive - Preliminary Plan for September / October BL characterization worked out envisaged goals magnet readiness target diffuser optics conclusions Summary 18June 3 rd 2009MICE CM24 - RAL18
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