1. MICE Beamline Status
m. apollonio
17 December 2009
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
17 December 2009
MICE VC 127 2

3. Q1 Q2
TOF2 Q3 D1 D2 Q4 Q5 Q6 Q7 Q8 Q9
17 December 2009
MICE VC 127 3

4. Q1-2-3 scan (past run) F x (Q1-Q2-Q3) -Q2 Q3 Q1 f1 f2 GVA1
17 December 2009
MICE VC 127

5. Upstream Beam-line p! D1 ISIS synchrotron Q3 Q2 Q1 Target
17 December 2009
MICE VC 127

6. Q1-Q2-Q3 scan – US beamline optimisation
Q1-2-3 varied from nominal value
Charged particles counted 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!)
nominal config.
data MC
charged p- m- e-
17 December 2009
MICE VC 127

7. Q1-Q2-Q3 scan – US beamline optimisation
nominal config.
data MC
f1-only (MC) DATA p- m- e-
17 December 2009
MICE VC 127

8. Q1-Q2-Q3 scan – US beamline optimisation
nominal config.
data MC
f2-only (MC) DATA p- m- e-
17 December 2009
MICE VC 127

9. Q1-Q2-Q3 scan – US beamline optimisation
nominal config.
data MC
f3-only (MC) DATA p- m- e-
17 December 2009
MICE VC 127

10. p Muon BeamLine: G4BL simulation – Q1.DS rad rad X’ vs X Y’ vs Y mm mm
CALC_EMI
eNT= mm rad
sx = cm sY = cm
bT = mm aT =
RADIUS = mm
eNx= mm rad bx = mm ax= ex= mm rad
eNy= mm rad by = mm ay= ey= mm rad
P= MeV/c
Z=Q1DS
rad
rad
X’ vs X
Y’ vs Y mm mm
Y vs X
17 December 2009
MICE VC 127 10

11. m Muon BeamLine: G4BL simulation – TOF0 X’ vs X Y vs X dP/P<10%
Y’ vs Y m
CALC_EMI
eTN= mm rad
sX = cm sY = cm
bT = mm aT =
RADIUS = mm
eNx= mm rad bx= mm ax= eX=1.47 mm rad
eNy= mm rad by= mm ay= eY=1.02 mm rad
P=250 MeV/c
Z=TOF0
17 December 2009
MICE VC 127 11

12. m Muon BeamLine: G4BL simulation – TOF1 X’ vs X Y vs X dP/P<10%
Y’ vs Y m
CALC_EMI
eTN= (mm rad)
sX = (cm) sY = (cm)
bT = (mm) aT =
RADIUS = (mm)
eNx= bx= mm ax=
eNy= by= mm ay=
P=223 MeV/c
Z=TOF1
17 December 2009
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 …)
17 December 2009
MICE VC 127

14. RUN 1125 DATA (DKSOl SCAN) DATA Run 1125 (PI+)
Ptgt = PD2 = MeV/c
DKSol = 679A = 3.9T (+0.74T)
protons?
~8300 entries
~12000 entries
slab hits …
17 December 2009
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
17 December 2009
MICE VC 127

16. d.s. BL tuning: match to diffuserQ4 Q1
Dipole1
DK solenoid Q2 Q3
Dipole2 Q5 Q6 Q7 Q8 Q9
Pp=444 MeV/c
Pm=255 MeV/c
Pm=214 MeV/c
Pm=208 MeV/c
fix D1
fix D2 p
17 December 2009
MICE VC 127 16

17. Optimising the BL – match to diffuser This is the (e,P) matrix
17 December 2009
MICE VC 127

18. Pdiff = 148 215 256 Ppi (tgt) = 350 190 350 17 December 2009
17 December 2009
MICE VC 127

19. Will it work?
17 December 2009
MICE VC 127

20. PI- (444MeV/c) MU- (256 MeV/c) at D2 PI- should be here: 30.44
~29.
RUN –
PI- (444MeV/c) MU- (256 MeV/c) at D2
PI- should
be here: 30.44
NB: DTmu(256)= DTmu(300) * beta300/beta256
= * .943/.923 = 29.13
17 December 2009
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?
17 December 2009
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
17 December 2009
MICE VC 127

23. m Muon BeamLine: G4BL simulation – Diffuser
CALC_EMI
eN= mm rad
sX = cm sY = cm
bT = mm aT =
RADIUS = mm
ex= mm rad bx= mm ax=
ey= mm rad by= mm ay=
P=214 MeV/c
Z=Diffuser
17 December 2009
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
17 December 2009
MICE VC 127

25. a) Monitoring the Run
17 December 2009
MICE VC 127

26. e.g. ... (7, 9, 10, … December) PI (444 MeV/c)  MU (258 MeV/c)
before
new calib
17 December 2009
MICE VC 127

27. b) Select muons c) Compute phase space
17 December 2009
MICE VC 127

28. RUN 1408 – P0=400 /PD2=230 selecting the muons
17 December 2009
MICE VC 127

29. TOF 0
17 December 2009
MICE VC 127

30. TOF 1
17 December 2009
MICE VC 127

31. x RMS norm emittance = 4.5 mm y RMS norm emittance = 1.8 mm
If muons...
x RMS norm emittance = 4.5 mm
y RMS norm emittance = 1.8 mm
Transverse 4d RMS norm emittance = 2.8 mm
17 December 2009
MICE VC 127

32. RUN 1386-1387 – P0=444 /PD2=256 selecting the muons
17 December 2009
MICE VC 127

33. G4BL prediction
17 December 2009
MICE VC 127

34. TOF 0
X’ vs X
Y’ vs Y
G4BL
17 December 2009
MICE VC 127

35. TOF 1
X’ vs X
Y’ vs Y
G4BL
17 December 2009
MICE VC 127

36. RUN 1409–1411 P0=336.8 /PD2=200 selecting the muons (very broad peak, I kept conservative)
17 December 2009
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
17 December 2009
MICE VC 127

38. 17 December 2009
MICE VC 127

39. 17 December 2009
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
17 December 2009
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
17 December 2009
MICE VC 127