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!