1 / 28

MICE report

MICE report. M. Apollonio – University of Oxford. The MICE-UK Collaboration. i-MICE = 38 institutions in UK, US, JP, China & Europe. and. a Neutrino Factory. Store ~20 GeV muons in a ring m decays  n m and n e Detectors at few x 1000 km. q 13 non zero then n e  n m

darius
Télécharger la présentation

MICE report

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MICE report M. Apollonio – University of Oxford UK Neutrino Factory meeting- RAL - (10/1/2007)

  2. The MICE-UK Collaboration i-MICE = 38 institutions in UK, US, JP, China & Europe UK Neutrino Factory meeting- RAL - (10/1/2007)

  3. and a Neutrino Factory Store ~20 GeV muons in a ring mdecays  nmand 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 UK Neutrino Factory meeting- RAL - (10/1/2007)

  4. In 2D at a focus 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 UK Neutrino Factory meeting- RAL - (10/1/2007)

  5. MICEin new 200 MeV/c muon beam at RAL Section ofCooling 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 CDREngineering is challenging UK Neutrino Factory meeting- RAL - (10/1/2007)

  6. 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: • <dE/dX>versus scattering (X0)  low Z absorber material  tight focus (low b function) • Figure of Merit = X0 <dE/dX> •  H2 is best absorber material UK Neutrino Factory meeting- RAL - (10/1/2007)

  7. theconstructionof an IONISATION COOLeris not … MICE has been thought as adeveloping 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 characterisebeam III controlsystematics IV demonstratecooling V cooling +re-acceleration VIfull lattice section PHASE I PHASE II UK Neutrino Factory meeting- RAL - (10/1/2007)

  8. m PID + Tracker expected beam October 2007 after few months PHASE I (progress) hall, target, beam, tracker & PID (STEP 1) spectrometer (STEP 2) the beam is part of the system ... UK Neutrino Factory meeting- RAL - (10/1/2007)

  9. HALL & infrastructure UK Neutrino Factory meeting- RAL - (10/1/2007)

  10. Need large emittanceBEAM • targetdips intoISIS halopionsmuons • muonscaptured inSC solenoid(PSI Zurich) • beam transport tuneable140 – 240 MeV/c • lead diffuser emittances of 2, 6, 10 (p) mm-rad • aim is600 muons / 1 msec ‘spill’ @ 1Hzthrough MICE • extensively studied withlinear optics codes + GEANT4 simulations isis structure UK Neutrino Factory meeting- RAL - (10/1/2007)

  11. Loss versus time and depth Edge of pipe • dipping target system • titanium blade (1x10x35 mm) • magnetic shuttle • target mechanismsuccessfully 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 byDaresbury • successfully tested up to 20A, now being modified at Daresbury to allow running at higher currents. + sintetico? stator UK Neutrino Factory meeting- RAL - (10/1/2007)

  12. 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] UK Neutrino Factory meeting- RAL - (10/1/2007)

  13. 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] UK Neutrino Factory meeting- RAL - (10/1/2007)

  14. each absorber contains 22 litres of Hydrogen hydrogen stored in hydride beds – first bed delivered R&D system being developed – mimic absorber functionality + use as test cryostat for absorbers & eventually for first absorber safety  reviews & ‘HAZOP’s of system  inform design (in progress) HYDROGEN SYSTEM (RAL ED) UK Neutrino Factory meeting- RAL - (10/1/2007)

  15. spectrometersolenoid (US) 5 superconducting coils  uniform 4T field over >1 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 UK Neutrino Factory meeting- RAL - (10/1/2007)

  16. 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 UK Neutrino Factory meeting- RAL - (10/1/2007)

  17. Q7---8---9 Q4---5---6 PID scope:upstream:p/m separation(residual p in the beam)TOF0 + TOF1 + CKOVdownstream:e/m separation(e from m decay)TOF2 + Calorimeter upstream+downstream TOF1+TOF2:define RF phase of muons (60 ps timing) UK Neutrino Factory meeting- RAL - (10/1/2007)

  18. PID: Time Of Flight (0,1,2) & Cerenkovbasic designs completed (october PID review) TOF0 [Milan]: tested at Frascati (Jul 06) ready to be completedfinal 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 @FNAL (summer ’06) reflector R&D (fall ’06) mech. assembly (may ’07) ready to install (summer ’07) funded TOF2: conceived, but not ready to start UK Neutrino Factory meeting- RAL - (10/1/2007)

  19. 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 yetfunded availability of the entire system by fall 07 still in question UK Neutrino Factory meeting- RAL - (10/1/2007)

  20. DAQ 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 UK Neutrino Factory meeting- RAL - (10/1/2007)

  21. 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 …. UK Neutrino Factory meeting- RAL - (10/1/2007)

  22. 470mm 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 ~ 4Ton axis; flips sign at centre Large internal & external forces ~200 tons & ~70 tons Cryocoolers used for coils & absorber  save O(£IM) on cryogenic system UK Neutrino Factory meeting- RAL - (10/1/2007)

  23. Absorber body Oxford design & FEA of thin windows HYDROGEN ABSORBERS (JP/US) KEK test cryostat Full size LH2 absorber Tested with H2 and He UK Neutrino Factory meeting- RAL - (10/1/2007)

  24. RF – tests on 201.2 MHz unit (FNAL) 16 MV/m nominal gradient reached @ B=0 plans to test the cavity in the presence of B ~ 2T (ready to start) UK Neutrino Factory meeting- RAL - (10/1/2007)

  25. ICST CC design 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 UK Neutrino Factory meeting- RAL - (10/1/2007)

  26. 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 UK Neutrino Factory meeting- RAL - (10/1/2007)

  27. End Coil 2 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 UK Neutrino Factory meeting- RAL - (10/1/2007)

  28. SUMMARIZING… the international MICE collaboration • continues its work towardsfirst beamonfall ’07 • detector construction, test and commissioning • aiming at having allPHASE Icommitments fulfilled • DAQ • complete simulation/analysis of MICE STEP VI in view ofPHASE II • aware of funding problems which don’t appear as insurmountable UK Neutrino Factory meeting- RAL - (10/1/2007)

More Related