Post on 01-Apr-2015
1April, 22 2009 UKNF09 - Lancaster 1
MICE Beamlinem. apollonio
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BeamLines Availability
April, 22 2009 UKNF09 - Lancaster
P0 (MeV/c)195 WITH WITHOUT OVER
SOLENOID SOLENOID CURRENTMUON Ploc (MeV/c)
Q1 191.92 48.41 41.14
PTOF0 (MeV/c) Q2 191.66 60.43 75.19
182.31 Q3 191.41 42.01 45.99
D1 191.15 144.01 143.88
Sol 190.88 NA NA I > I_MAX
D2 188.54 75.34 72.20
Q4 186.80 124.98 124.98
Q5 186.15 167.02 167.02
Q6 185.49 110.56 110.56
Q7 159.89 104.64 104.64
Q8 159.52 158.19 158.19
Q9 158.89 134.86 134.86
OPTICS
CURRENT (A)
INSTRUCTIONS:a) insert initial momentum P0 b) adjust the value to match the P at D1 (red box)c) read the currents out of the relevant final column (SOLENOID / NO SOLENOID)
(b)
(c)
(a)
0
50
100
150
200
250
0 5000 10000 15000 20000 25000 30000
Reference Beam Line – muon (e,P=207 MeV/c)
Beamlines for initial/calibration studies:from (a) with local momentum rescaling of the magnets[ with / without solenoid ] (infact we used the one with no DKsol for the aformetntioned reasons)electron (@150 MeV/c) used for TOF calibrationpions (@ 300 MeV/c) 1st muons seen protons (@480 MeV/c) 1st estimate of primary intensity
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Target Studies
April, 22 2009 UKNF09 - Lancaster
25 deg
Q1 acceptanceORBIT simulation:Beam Loss in ISIS
A. Dobbs
production in the first q-pole(G4Beamline)
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TOF Analysis to determine Beam Parameters:- x / y- mittance- x / y, x / y
see Mark’s Talk
BeamLines Analysis
April, 22 2009 UKNF09 - Lancaster
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search for Q4-5-6 & Q7-8-9 currents to match optics at theu.s. face of the diffuser
for every chosen [3,6,10] mm rad (norm.)
at every defined P = [140,200,240] (MeV/c)
BeamLine Completion: tuning for all (,P)
April, 22 2009 UKNF09 - Lancaster
6April, 22 2009 UKNF09 - Lancaster
D1
D2 Q4
Q1
Q2
Q3
Q5 Q6 Q7 Q8 Q9
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OUTPUT u.s.of the diffuser
INPUT: beamline u.s.Section
Q4 Q5 Q6 Q7 Q8 Q9
Q1 Q2 Q3 Sol
Dip
ole1
Dip
ole2
alpha0
alphaa0beta b0
GA+Turtle Optimiser
N
i i
i
i
ifitnessF
1
2
0
2
01
8
9
TR ~ 3%
BETA=0.78 m ALPHA=0.2
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recalculated e=6mm rad, P=207
new tuning e=10 mm rad, P=207
investigate case e=3 mm rad P=207(does not converge)
PLAN: fix P=140/240 and cover the remaining empty elements
???
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- so far beamline used for initial studies & calibrations- no solenoid reduced amount of secondaries - studies to complete the (e,P) matrix (BL tuning for all possible configurations of MICE)
-waiting for DKsol(1) and check predictions vs measurements
(1) & tgt
Summary
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