MICE report

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MICE report

• M. Apollonio University of Oxford

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The MICE-UK Collaboration
Brunel A. Khan, P. Kyberd, J.J. Nebrensky
CCLRC Daresbury A. Moss, M. Poole
Glasgow F. J. P. Soler, K. Walaron
Lancaster Cockcroft Accelerator Centre R. Seviour, M. Stables
Liverpool P. Cooke, R. Gamet
Imperial College London G. Barber, R. Beuselinck, P. Dornan, R. Flack, A. Jamdagni, K. Long, T. Matsushita, D. R. Price, C. Rogers, J. Sedgbeer, M. Takahashi
Oxford John Adams Institute M. Apollonio, J. H. Cobb, P. Lau, W. Lau, S. Yang
CCLRC RAL D.E. Baynham, T.W. Bradshaw, M. Courthold, P. Drumm, R. Edgecock, M. Hills, Y. Ivanyushenkov, A. Jones, W.J. Murray, C. Nelson, J.H. Rochford, K. Tilley, K. Walaron
Sheffield C. N. Booth, P. Hodgson, L. Howlett, R. Nicholson, P.J. Smith
i-MICE 38 institutions in UK, US, JP, China
Europe
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a Neutrino Factory
Store 20 GeV muons in a ring m decays ? nm and
ne Detectors at few x 1000 km
q13 non zero then ne ? nm ? wrong sign muons at
detector
Difference in oscillation rates between conjugate
channels
? Leptonic CP violation
Need to store 1021 muons / year Muons are
tertiary beams ? must cool before acceleration
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• Cooling needed in order to reduce the volume of
  p.s. initially large due to
• inherent production mechanisms and cope with
  physical apertures in the
• acceleration stages
• sx 10 cm, sq 150 mr ? large normalised
  emittance, en

Cooling is nothing but emittance reduction ? 2-10
x Nm in the accelerator
Highly advantageous for a NF, necessary in a
m-collider Finite m lifetime (2.2 ms) prevents
from using traditional techniques ? ionization
chooling
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MICE in new 200 MeV/c muon beam at RAL
Section of Cooling Channel Emittance
measurements PID

• Design, build, commission operate realistic
  section of cooling channel
• Measure performance in variety of operating modes
  beam conditions
• Results will inform the NF CDR
  Engineering is challenging

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the principle of IONISATION COOLING is simple

• Pass muons of 200 MeV/c through
• absorbers ? reduce pt and pl
• RF replaces pl
• ? beam cooled
• Emittance decreases exponentially

• ltdE/dXgt versus scattering (X0)
• ? low Z absorber material
• ? tight focus (low b function)

• Figure of Merit X0 ltdE/dXgt
• ? H2 is best absorber material

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the construction of an IONISATION COOLer is not

• MICE has been thought as a developing system
• 6 steps ? progressive developement
• 2 phases ? 1st funded, 2nd waiting for approval
• Optimizing resources and allowing an ongoing
  knowledge of the device

I II characterise beam III control
systematics IV demonstrate cooling V cooling
re-acceleration VI full lattice section
PHASE I
PHASE II
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PHASE I (progress)
hall, target, beam, tracker PID (STEP
1) spectrometer
(STEP 2)
the beam is part of the system ...
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HALL infrastructure
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• Need large emittance BEAM
• target dips into ISIS halo ? pions ? muons
• muons captured in SC solenoid (PSI Zurich)
• beam transport tuneable 140 240 MeV/c
• lead diffuser ? emittances of 2, 6, 10 (p)
  mm-rad
• aim is 600 muons / 1 msec spill _at_ 1Hz through
  MICE
• extensively studied with linear optics codes
  GEANT4 simulations

isis structure
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• dipping target system
• titanium blade (1x10x35 mm)
• magnetic shuttle
• target mechanism successfully installed on ISIS
  (end of October) Sheffield
• successful data taking ? particle production
  rates and beam profile
• 
  (currently being analysed)
• 2 shifts at the beginning of November
  logistics/detectors by RAL Glasgow
• a HW problem prevented a second data taking run
  in December
• future
• analyse data
• further develop control electronics
• full power electronics provided by Daresbury
• successfully tested up to 20A, now being
  modified
• at Daresbury to allow running at higher
  currents.

sintetico?
stator
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Beamline Components all magnets at RAL,
detailed engineering

• PSI solenoid for m capture focusing RAL
• Insulation OK
• Cryogenics in situ (being installed)
• Commission expected by Q1 07

• design of the pion capture system
• Liverpool

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e (mm rad) p (MeV/c) 1p 6p 10p
240
200 TT G4BL TT G4BL TT G4BL
140
beamline design RAL, Brunel, IC,
Glasgow goal tune optics for the (e,p) matrix
collimator to limit activity in TOF0
TT Transport Turtle G4 G4Beamline (incl new
Ckv1)
study of fringe field effects
diffuser z-position basically defined, radius
to be optimised
design of the diffuser insertion Oxford
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HYDROGEN SYSTEM (RAL ED)
each absorber contains 22 litres of Hydrogen
hydrogen stored in hydride beds first bed
delivered RD system being developed mimic
absorber functionality use as test cryostat
for absorbers eventually for first absorber
safety ? reviews HAZOPs of system ? inform
design (in progress)
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spectrometersolenoid (US)
5 superconducting coils ? uniform 4T field over
gt1 m for sci-fi tracker US (LBL) responsibility
engineering FEA from Oxford Contracts placed in
June 2006 Delivery of first unit (to RAL)
november 2007
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SciFi Tracker (IC/Brunel/Liverpool/US/JP)
Low mass Sci-Fi tracker inside solenoid 5 planes
x 3 views 5th station completed before
christmas checked manufactory procedure OK
? start 1st tracker production 14 station
planned (10 4 spare) on time for the
first beam (fall 07) 350 micron fibres VLPC
readout Cosmic ray tests with 3 planes 4-plane
prototype tested at KEK Light yield (10pe) is
OK Production QC expertise gained Data used as
input to simulations ? can measure to de/e
1/1000
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PID scope upstream p/m separation(residual p
in the beam) TOF0 TOF1
CKOVdownstream e/m separation(e from m
decay) TOF2 Calorimeter
upstreamdownstream TOF1TOF2 define RF phase of
muons (60 ps timing)
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PID Time Of Flight (0,1,2) Cerenkovbasic
designs completed (october PID review)
TOF0 Milan tested at Frascati (Jul 06) ready
to be completed final decision on f.e.el. to be
taken
TOF1 some components ready
not ready to start(funds)
CKOV US,Louvain dual aerogel
radiators aerogel tested _at_FNAL (summer 06)
reflector RD (fall 06) mech. assembly (may
07) ready to install (summer 07) funded
TOF2 conceived, but not ready to start
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e-m calorimeter Rome III, Trieste,
UniGe design needs to be finalized KL
e-identifier) Pb-SciFi front end (preshower a la
KLOE) sci-fi lead
modules being presently built
design for PMT B-shielding in
progress
tests in B-field soon
FEE prototype being tested at CERN
funded at 80/90 SW
m-identifier) sandwiched layers of scintillator
design from UniGe (promising
results from sim)
same R/O as KL
not yet funded availability
of the entire system by fall 07 still in question
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• DAQ Software Training started in CERN-ALICE group
• The ALICE DAQ software framework, DATE, will
  provide the necessary
• EventBuilder tool
• Subevents collected by different processors have
  to be synchronized and put
• together before storage
• Complete Flash ADC/BTF Data analysis Nov 2006
• DAQ Test bench including Event builder Feb 2007
• Order Hardware for Stage 1 March 2007
• Move DDAQ system to RAL July 2007

DAQ
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PHASE II (proposed)
WP1 Hall, Infrastructure, Management of
Installation Integration (ISIS / RAL-ED / DL /
Oxford / Lancaster)

• Implement additional infrastructure required for
  cooling section
• Install magnet PSUs / Expand water system /
  Incorporate modules into vacuum control systems
• Integrate ex-LBNL CERN amplifiers into RF power
  system
• Provide RF power distribution splitters
• Procure 6 TH116 tubes
• Procure 2nd and 3rd Hydrogen systems
• Management of engineering integration
  installation
• MICE experiment
• Continue engineering oversight of integration of
  cooling channel interfaces, diffuser.
• MICE hall
• Drawing management, define installation
  tolerances, acceptance tests, support structures,
  pressure vessel certification, safety .

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WP2 FOCUS COIL MODULES (Oxford RAL-ED)
Key components of cooling section Two S/C coils
inside warm-bore cryostat ? focus beam at
absorbers Tightly integrated assemblies Based
on FS2 conceptual design ? Significant evolution
of design B 4T on axis flips sign at
centre Large internal external forces 200
tons 70 tons Cryocoolers used for coils
absorber ? save O(IM) on cryogenic system
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HYDROGEN ABSORBERS (JP/US)
KEK test cryostat
Full size LH2 absorber Tested with H2 and He
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RF tests on 201.2 MHz unit (FNAL)
16 MV/m nominal gradient reached _at_ B0 plans to
test the cavity in the presence of B 2T
(ready to start)
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Coupling Coils

• LBNL ICST Harbin Collaboration
• The relevant design calculations have been done
• Preliminary specifications have been written for
  the coupling magnet
• Two designs exist
• Single coil as shown
• 3 coil (distributed) design
• ICST application for funds is being considered

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SOFTWARE
Active software group with regular
workshops G4MICE for simulation, reconstruction
analysis well developed ICOOL (NF tracking
code) expertise acquired Specific fast code
developed for beam optics
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MAGNETICS (OXFORD RAL-ED)
Fields at cryocoolers
Shielding for PID PMTs
Shielding in Hall ISIS control room
Many magnetic calculations of entire system
including Forces Stray fields Shielding
Quench analysis for entire channel
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SUMMARIZING

• the international MICE collaboration
• continues its work towards first beam on fall 07
• detector construction, test and commissioning
• aiming at having all PHASE I commitments
  fulfilled
• DAQ
• complete simulation/analysis of MICE STEP VI in
  view of PHASE II
• aware of funding problems which dont appear as
  insurmountable