MICE Project Board 28-08-2011 Alain Blondel 1 MICE running Preamble ISIS running Step I Step(s) IV...

1MICE Project Board 28-08-2011 Alain Blondel

MICE running

Preamble

ISIS running

Step I

Step(s) IV

Step V (and VI)


0. 0.04 0.08 0.12 0.16 0.20 sin2 213

90% C.L.

new results from T2K (13 June) and MINOS (24 June) on e appearance indications that sin2213 is >0

old fit

T2K

MINOSnote:different CP

axes!


Needs confirmation but this is exciting for neutrino long baseline physics!

Large values of sin2213 would give a chance for superbeams to have a shot at CP violation,

but Neutrino Factory remains most precise and only device able to test oscillations very precisely -- precision measurements of angles and mass differences, -- tau appearance and unitarity tests-- detailed study of matter effects-- etc…

Physics is moving forward, no time to waste, Ionization cooling must be demonstrated


Incoming muon beam

VariableDiffuser

Beam PIDTOF 0

CherenkovTOF 1

Trackers 1 & 2 measurement of emittance in and out

Liquid Hydrogen absorbers 1,2,3

Downstreamparticle ID:

TOF 2 KL, EMR

RF cavities 1 RF cavities 2

Spectrometer solenoid 1

Matching coils 1&2

Focus coils 1 Spectrometer solenoid 2

Coupling Coils 1&2

Focus coils 2 Focus coils 3Matching coils 1&2

10% cooling of 200 MeV/c muons requires ~ 20 MV of RF single particle measurements =>

measurement precision can be as good as out/ in ) = 10-3

never done before either…


Quantities to be measured in a cooling experiment

equilibrium emittance = 2.5 mm

cooling effect at nominal inputemittance ~10%

curves for 23 MV, 3 full absorbers, particles on crest

Measurements of

TRANSMISSIONEMITTANCE REDUCTIONEQUILIBRIUM EMITTANCE

for the standard Study II optics

are the main deliverables

beam line can deliver 3,,6,,10 mm(see Mark’s talk)other values can be reached byoffline culling or reweighting


MICE Steps

STEP I

STEP II

STEP IV

STEP Vaim: April 2014

STEP VI

STEP III/III.1

October 2012- March 2013

-- skip --

-- skip --

-- complete -- EMR comm.


MICE RUNNING


MICE Target

-- Linear motor dips target at 80g -- in beam since Sept’09 571k dips-- reproducibility excellent-- tested regularly for reproducibilityto test possible degradation. -- not-so-easy to build a second one that works that well!


T2.X = linear motor 2, target mech. X motor 2 presumed inferior to motor 1nevertheless almost there! Building two new linear motors with improved tolerances. Aim at having T3 and T4 targetsto install in ISIS & Spare by end 2011


MICE STEP I Superb data taking end 2009 and summer 2010!

GOALS ACHIEVED See presentation by M. Rayner at FAC in Jan 2011Rates limited by beam loss induced in ISIS.


-- required muon rate is ~50/200 per pulse without (stepI-IV)/with (StepV-VI) RF

-- limitation is irradiation in ISIS due to beam losses induced by MICE target measured in Volts on Beam Line Monitors -- observed rates in MICE 2010 (6mm beam)

5 TOF1/ms/V_BLM for - beam,

30 TOF1/ms/V_BLM for + beam

following a series of dedicated irradiation runs and measurements of activationISIS allowed us to run routinely at 2V and even tried up to 10V.

We are within range for STEPS I-IV

further studies on how to get more muons per losses are ongoing (beam bump, timing, faster dip, etc..)

muon rates


High beam loss (up to 10 V) tests (14 Aug.)

https://micewww.pp.rl.ac.uk/elog/MICE+Log/1449 https://micewww.pp.rl.ac.uk/elog/MICE+Log/1447

https://micewww.pp.rl.ac.uk/elog/MICE+Log/1449

https://micewww.pp.rl.ac.uk/elog/MICE+Log/1447


How MICE Measures in Step 1

(t0,x0,y0)

(t1,x1,y1)

TOF0 TOF1

Beam profile at TOF0

Use TOF0 and TOF1 to determine phase space parameters of the muon beam

Tof-0

0.40 m

10 x 4cm scintillator barsx = 1.15 cmt = 50 ps

Tof-1

0.42 m

7 x 6cm barsx = 1.73 cmt = 50 ps

Momentum-dependent matrix relates

(t0,x0,y0,t1,x1,y1)

(t1,p,x1,x’1,y1,y’1)

solved by iteration


Measurement Result: Data vs MC

Reconstructed transverse phase space of the baseline MICE beam (6-200) at TOF1

Data

MC

M.Rayner OxfordU

y (mm) vs x (mm) x (mrad) vs x (mm) y (mrad) vs y (mm)


STATISTICS

See John Cobb MICE note 268: Statistical error on relative change of emittance is 1% with 105 muons

Presently allowed running with beam loss of 2-3 V (assume 50 + /Spill)

for STEP IV: 1 measurement = 2 103 spills ~ 2 hours. (full matrix in 3 days)

for step V and VI need 12 times more statistics (match RF phase!) 1 measurement = 2 104 spills ~ 20 hours.

We would aim at higher rates for step V, rate is sufficient for step IV


ISIS running periods, MOM Rota and MICE runs in 2011

First semester

Second semester


EMR installed in MICE hall

First 3 modules, running cosmics now. Start run on 30 June. Full detector to run in Feb 2012


ISIS running

Typical year consists of 5 ISIS ‘user runs’ of ~35 days each + run-ups, MP.

5 periods April 2013 to April 2014 priority to Step V installation Some additional step IV running not ruled out but lower priorityNext Long Shut Down envisaged: Aug. 2014 to February 2015

new target,full EMR

LiH wedge+ reserve

no running

Step IVInstallation

Step IV: empty/LH2/(LHe)

no absorberflat LiH


MICE Steps

STEP I

STEP II

STEP IV

STEP V

STEP VI

STEP III/III.1


The point was raised (Cobb) that

1.. The optics of step III is not easy to match for conservation of emittance

2. The logistics of changing from Step III to step IV is not trivial.

3. we can execute the physics program of step III and step III.1 with the magnetic channel of step IV

effect on Schedule is a balance =

time gained by suppressing specific installation of step II and step III

time lost by required push-pull operations in replacing solid absorbers

>4 mo

--vs--

3 to 6 x8 days

= Winner!

Skipping steps


Amplitude Cooling... in empty channel

Step 3 empty Step 4 empty

Amp OUT

Amp IN

Amp OUT

Amp IN

6mm beam, SigPz = 1 MeV/c, 100k muons

140

120

100

80

60

40

20

140

120

100

80

60

40

20

0 20 40 60 80 100 120 140

0 20 40 60 80 100 120 140

(T.Carlisle)


Clearly the optics of step III leads to ‘heating’ up to 5% (mis-beaviour of dispersive beam?)

Step IV is much cleaner from this point of view (~0.2%)


23

Step IV

Time to install Step IV – 168 days (about six months)Step IV running time – ~10 daysTime to substitute solid absorber in FC – 8 days

Important assumptions at this stage:• AFC module is ready and tested• LH2 infrastructure in MICE Hall is ready

Hayler, Nichols


STEP IV

in out

1.liquid H2 absorber, emptycommission system, tracker, detectors, optics compare in / out

for various values of momentum, emittance and beta function

systematic errors

2.liquid H2 absorber, full

measure cooling properties of liquid HydrogenAt that point will have measured ionization cooling!

can also measure LHe (lower priority)

STEP IV configurations



3.Vacuum (only He and window for trackers)

execute STEP III program; compare in / out

information on systematic error of final experiment information on effect of windows by comparison with

STEP IV

in out



4.Solid absorbers execute STEP III.1 program; compare trackin /trackout

compare in / out

for various values of momentum, emittance and beta function

information on emittance generating properties of materials

STEP IV

in out

2727

The MICE Energy Absorber

New Hanger Arrangement

3 SS straps 1 Machined SS

clamp 45 cm, t= 65 mm

Y12 is producing the LiHProduced by Hot Isostatic

Pressing (150 oC, 30,000 psi)

Final parts will beTested for Chemical

composition and purity

Radio-graphed to ensure no voids

Machined to sizeDimensional inspectionCoated with epoxy

completely


Absorber measurements thickness 10 MeV energy losswill measure: Liq H2 330 mmLiH 65 mm

Also possible (used in NuFACT beams)Liq He 410 mmBe 34 mmAl 23 mm

with low priority: Plastic 50 mmFe 9 mm Cu 8 mm

Will study wedge absorbers (change 6D emittance)


Step V

STEP V

“sustainable” cooling:cooling happens in the absorbers but production of cool beam requires acceleration with RF cavities

old simulation (at 88MHz)

RF phase

Eout-Ein

-1- running with shutters to commission RF cavities (no beam needed) -1’- running with LH2 and RF first with no beam to check RF noise-2- running with beam with no RF and no LH2 to check optics -3- running with beam with LH2 no RF-4- running with beam with LH2 and RF -5- or running 2-3-4- with solid absorbers?

limited in optics and performance step VI!

09.9.2010 Slide 30

FINAL COMMENTS

Steady progress towards demonstration of Ionization Cooling

Already demonstrated validity of beam line principle and emittance measurements with particle detectors

On daily basis: LHe test of LH2 system, 1MW in RF unit, EMR prototype, SS repair plan, etc…

Progress on global MICE Project management (Thanks Andy!)

On solid ground for running step IV in Oct. 2012, aiming to start step V in 2014 before long shutdown (tough but everyone on board!)

Looking forward to significant cooling measurement results!

09.9.2010 Slide 31

T2KK: T2K 1.66 MW beam to 270 kton fid volume Water Cherenkov detectors in Japan (295km) and in Korea (1050 km); DUSEL: a WBB from Fermilab to a 300 kton WC in Dusel (1300km); SPL 4 GeV, EU-BB and BB+SPL: CERN to Fréjus (130km) project; NF bl is the Neutrino Factory baseline (4000km and 7000km baselines) and NF Py+INO represents the concrete baseline from CERN to Pyhasalmi mine in Finland (2285 km) and to INO in India (7152 km); PS2-Slanic is a preliminary superbeam study at 1500km based on an upgrade of PS2 to 1.66MW and a 100kton Liquid Argon TPC

CERN – SPC panel report , SPC meeting, 16.03.2010

Figure 2 A representative compilation of sensitivities of some future long baseline projects. Here the fraction of CP where CP violation can be observed at 3 standard deviations is plotted as a function of 13.

09.9.2010 Slide 32

From IDS-NF IntermediateDesign Report IDR

09.9.2010 Slide 33

High-power target . 4MW . good transmissionMERIT experiment (CERN)

Major challenges tackled by R&D expts

Fast muon cooling MICE experiment (RAL)

Fast, large aperture accelerator (FFAG)EMMA (Daresbury)

MICE Project Board 28-08-2011 Alain Blondel 1 MICE running Preamble ISIS running Step I Step(s) IV...

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Transcript of MICE Project Board 28-08-2011 Alain Blondel 1 MICE running Preamble ISIS running Step I Step(s) IV...