MICE CM30 Goals of the Meeting Alain Blondel 1 MICE CM30 – Goals and Status.
MICE CC visit at CERN 10-01-2012 Alain Blondel 1 MICE The International Muon Ionization Cooling...
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Transcript of MICE CC visit at CERN 10-01-2012 Alain Blondel 1 MICE The International Muon Ionization Cooling...
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
MICE CC visit at CERN 10-01-2012 Alain Blondel 19
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