Muon Ionization Cooling Experiment (MICE)
Koji Yoshimura
Institute of Particle and Nuclear ScienceHigh Energy Accelerator Research Organization
(KEK)
NufactJ03May 16-17, 2003, TMU
Outline
What’s is MICE? Aim of MICE R&D activities Current Status & Schedule
NufactJ03May 16-17, 2003, TMU
MICE Collaboration
EU/US/Japan Collaboration More than 100 People, More than 30 institutes RAL, UK host Japan
Osaka: Y.Kuno, A.Sato, M.Aoki KEK: S.Ishimoto, S.Suzuki, K.Yoshimura
NufactJ03May 16-17, 2003, TMU
European Scheme of Factory
NufactJ03May 16-17, 2003, TMU
Why cooling?
NufactJ03May 16-17, 2003, TMU
Principle of Ionization cooling
€
dεn
ds≈ −
1
β 2
dE μ
ds
εn
E μ
+1
β 3
β⊥ 0.014( )2
2E μmμX0
In principle ionization cooling shouldwork, but in practice it is subtle and complicated
Approximation of the cooling relation
NufactJ03May 16-17, 2003, TMU
MICE Experimental Apparatus
NufactJ03May 16-17, 2003, TMU
Aims of MICE
Engineering Build, Work, Maintain
Demonstrate Ionization cooling Priciple has never tested!
Compare Simulation with various conditions Absorber materials Muon momentum Etc…Transmission, Equilibrium emittance etc.
NufactJ03May 16-17, 2003, TMU
Cooling Ring
Cost saving RF can be used many times
Longitugional Cooling Wedge shaped absorber
NufactJ03May 16-17, 2003, TMU
R&D Activities
Absorber Convection type KEK/Osaka
RF Magnet Detectors
Scifi Tracker Osaka/KEK Etc.
NufactJ03May 16-17, 2003, TMU
Convection-type L-H2 absorber
MICE/MUCOOL collaboration US/EU/Japan (KEK, Osaka)
KEK bench test of convection absorber I Liquid Ne Heat load Q ~ 70W LHe consumption 29.5 l/hr MICE requirements are met
Qtotal ~ 100 W High heat load and high flow rate make soli
d-Ne Modify flow direction Absorber II
Setup of KEK bench test of convection absorber I
NufactJ03May 16-17, 2003, TMU
Convection Absorber R&D:Absorber II
2 way flow with heater Test at FNAL
Safety issues Window thickness 1m
Pmax > 5bar Volume ratio
LH2/Vac ~ 62 > 52 Heaters are sheathed
Shippment to FNAL Spring, 2003
Initial helium filling test at FNAL Summer, 2003
Absorber II
Cryostat for the test at FNAL
NufactJ03May 16-17, 2003, TMU
Emittance Measurement(P. Janot)
NufactJ03May 16-17, 2003, TMU
TrackingThe baseline design is a scintillating fiber tracker based on the D0 design
An alternative design based on a TPC withGEM amplification and strip readout is being studied
NufactJ03May 16-17, 2003, TMU
TPG Option
NufactJ03May 16-17, 2003, TMU
Background from RF
NufactJ03May 16-17, 2003, TMU
MICE Scifi Tracker R&D US/UK/Japan Collaboration Beam test using KEK 12 GeV PS in December, 2002
Imperial college (Dr. Ed. Mckigney) Kurare =0.3mm, =0.5mm, UK fibre =1mm MA-PMT read out Study light yield and timing resolution
Scifi bundle used in the beam test Beam test at KEK Dec, 2002
NufactJ03May 16-17, 2003, TMU
Schedule
2003 Jan. Proposal to RAL 2003 Spring Decision made 2003 Autumn Main Tracker will be decided 2004 First muon beam with Minimum setup 2007 Full Setup
NufactJ03May 16-17, 2003, TMU
MICE at RAL
NufactJ03May 16-17, 2003, TMU
Staging
NufactJ03May 16-17, 2003, TMU
Summary MICE
Demonstration of Muon cooling Measure the emittance reduction of 10 % with 10-3 accuracy
Technological challenge Various R&D activities New Ideas/material (Ring cooler, Solid absorbers)
First step to NeutrinoFactory/Muon collider Proposal was submitted to RAL.
Collaboration has been organized If everything is going fine, ionization cooling will be demonstrated
in 2007!
Top Related