MICE CC visit at CERN 10-01-2012 Alain Blondel 1

MICE

The International Muon Ionization Cooling Experiment

MICE CC visit at CERN 10-01-2012 Alain Blondel

MICE = critical R&D for neutrino factory and muon collider

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neutrino factory: accelerate muons andstore to produce neutrinos

e e

-- flux known to <±1%

-- high energy electron neutrinos

long baseline oscillation manifests itself by wrong sign muons:

e ; N XLARGE (100kton) magnetized iron detector

Golden channel:Golden channel:

Or opposite charges (and anti-)

+ unique ability to test e

MICE CC visit at CERN 10-01-2012 Alain Blondel 09.9.2010 Slide 3

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 , 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.

MICE CC visit at CERN 10-01-2012 Alain Blondel 4

MICE CC visit at CERN 10-01-2012 Alain Blondel 5

Intense nucl. and hadr. physics

Intense Low-E muons Neutrino FactoryHiggs(es) Factory(ies)Energy Frontier -> 5 TeV

circa 1997-1999US, Europe, Japan Possible layout of a muon complex on

the CERN-Geneva site.

MICE CC visit at CERN 10-01-2012 Alain Blondel 6

Muon Collider-- Synchrotron radiation loss and beamstrahlung are reduced as (me/m) 4

Can go to high energy with circular machines (saves loads of RF hardware) really pointlike lepton lepton collisions at high energy

-- direct coupling to Higgs boson scales as (m /me) 2

Higgs factory only 63 GeV/beam for 126 GeV Higgs boson

Main challenges: --requires HUGE magnetic fields target solenoid 20T last cooling section 30-50T

-- RF in magnetic field

MICE CC visit at CERN 10-01-2012 Alain Blondel 7

Muon collider and neutrino factory target area

4 MW proton beam with <3ns bunches on liquid mercury target

Tapered 20 T 1.5 T solenoid focuses pions in forward direction Radiation issues on Solenoid (massive shiedinng required)

MICE CC visit at CERN 10-01-2012 Alain Blondel

Neutrino Factory and Muon Collider rest heavily on

-- ionisation cooling-- more generally manipulations of muon beams within solenoid magnetic fields-- MANY VARIANTS!

High Brilliance muon beams

Principle is straightforward…

transverse longitudinal

Empty magnet + wedge absorber

Magnet filled with (gas) absorber

MICE CC visit at CERN 10-01-2012 Alain Blondel 9

Practical realizations are more delicate…

IDS Neutrino Factory

Cooling Figure of

Merit

MICE (from Study II 2001)

MICE CC visit at CERN 10-01-2012 Alain Blondel 10

Practical realizations vary…

But all contain solenoid magnets (for transport and focus) RF cavities (for re-acceleration) and absorbers (for cooling itself. Best is Liq H2)

MICE CC visit at CERN 10-01-2012 Alain Blondel 11

Incoming muon beam

Variable

Diffuser

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…

MICE CC visit at CERN 10-01-2012 Alain Blondel 12

Incoming muon beam

VariableDiffuser

Beam PIDTOF 0, TOF 1

Cherenkovs

Trackers 1 & 2

Liquid Hydrogen absorbers 1,2,3

Downstreamparticle ID: TOF 2, KL

EMR

RF cavities RF power

Spectrometer solenoid 1

Spectrometer solenoid 2

Coupling Coils 1&2

Focus coils

MICE Collaboration across the planet

MICE CC visit at CERN 10-01-2012 Alain Blondel

MICE SCHEDULE update October 2011

STEP I

STEP IV Q4 2012 and 2013

STEP V

STEP VI

Run date:

CompletedEMR run Q2 2012

Under construction:

MICE CC visit at CERN 10-01-2012 Alain Blondel

Coupling coil (Harbin China)

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EMR (Geneva)

Diffuser (Oxford)

RF Amplifier (Daresbury)

RF cavities (Berkeley)

absorber windows (Mississippi)

LiqH2 absorber (KEK)

MICE construction: world-wide team effort!

AFC Magnet(RAL/Oxford)

Trackers(JP-UK-US)

Aim for completion in 2016

MICE CC visit at CERN 10-01-2012 Alain Blondel

MICE SCHEDULE update October 2011

STEP I

STEP IV Q4 2012 and 2013

STEP V

STEP VI

Run date:

CompletedEMR run Q2 2012

Under construction:

Schedule driver are the coupling coils

1v

1 1

MICE CC visit at CERN 10-01-2012 Alain Blondel 16

All MICE magnets are designed under the same principles:

-- 4K superconducting coils magnet with axial field ‘solenoids’

-- Each magnet is independently cooled with cryocoolers

-- Magnets have no return joke (global shielding in the MICE hall)

-- magnets ‘talk’ to each other large forces and magnetic influence quench protection is a significant issue

-- magnets are operated in continuous mode but changes in magnet current are frequent every run or few runs has a different magnetic field setting

MICE CC visit at CERN 10-01-2012 Alain Blondel 17

Coupling coil construction plan is being assembled

-- 3 Large magnets (outer dimension 3m) one for Mucool tests, 2 for MICE

-- LBNL responsibility

-- project leader was changed now Steve Gourlay (head of accelerator division)

-- original plan = construction at HIT Harbin China

-- not feasible, Harbin group has desintegrated

-- design effort in Shanghai (Pr Li Wang and collaborators)

-- construction of coils and parts in Qi Huan company in Beijing -- funding from H IT and DOE in place

-- test of coils and assembly of cryostat at/around LBNL or Fermilab -- final assembly and test of {coils+cryostats+cryocoolers+instrumentation) first at Fermilab? Second and third at CERN?

-- next steps cryostat drawings review and first coil test

MICE CC visit at CERN 10-01-2012 Alain Blondel 18

We are extremely grateful to Marzio Nessi for proposing help from ATLAS Magnet team

-- today: first meeting with MICE spokesperson and MICE project managerTo present the project and have a first discussion of possibilities

-- involvement of CERN team in review and definition of the schedule should be part of process

-- next step: visit of Steve Gourlay and LBNL team on 7 of February

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MICE and CERN

CERN is a member of MICE MICE is a recognized CERN experiment -- CERN played a key role in design of experiment in 2000-2002 -- provided RF amplifiers -- provide magnetic field measaurement device -- Neutrino team (Ilias Efthymiopoulos + Ole Hansen) participate in MICE step I (beam physics) -- CERN directorate (Myers, Bertolucci) very supportive of involvement of CERN in helping MICE completion in a timely way