1. DPNC Sept 2007Jean-Sébastien Graulich MICE The international Muon Ionization Cooling Experiment o o Introduction o o Beam Line o o Cooling Channel o o Particle Detectors o o Conclusion

2. DPNC Sept 2007Jean-Sébastien GraulichSlide 2 Introduction  MICE is part of the R&D program towards the neutrino factory – Factory is the most precise tool for - Physics  Cooling of muon beam is unexplored Large source of uncertainty on the cost and feasibility of factory (and Muon Collider)  Demonstrate it’s possible to engineer and operate safely and reliably a cooling channel with the required performances  Validate new software tools

3. DPNC Sept 2007Jean-Sébastien GraulichSlide 3 How to cool a muon beam ?  Cooling = emittance reduction  Stochastic cooling and electron cooling are too slow compared to   = 2.2  s  Ionization cooling is the only solution Never demonstrated experimentally though  Limited by Multiple Scattering -> low Z material -> Liquid Hydrogen

4. DPNC Sept 2007Jean-Sébastien GraulichSlide 4 Conceptual design  10 % Cooling, measured with 1 % precision -> emittance @ 0.1 %  Beam Diagnostic using particle per particle tracking  PID necessary  Diffuser allows varying emittance (from 1  to 10  mm rad)  Variable Diffuser Liquid Hydrogen absorbers 1,2,3 200 MHz RF cavities 1 200 MHz RF cavities 2 Upstream Spectrometer Beam PID Focus coils 1 Focus coils 2 Focus coils 3 Downstream Spectrometer Coupling Coils 1&2

5. DPNC Sept 2007Jean-Sébastien GraulichSlide 5 MICE Beam Line - - 1 Spill / second - - 1ms Spill duration - - 600 muons / Spill - - Muon beam momentum between 140 to 240 MeV/c - - Diffusers allowing from 1  to 10  mm rad beam RAL, UK

6. DPNC Sept 2007Jean-Sébastien GraulichSlide 6 MICE Target  Target mechanism has been developed to dip Ti target into ISIS beam in the last ms of ISIS cycle 80 g acceleration achieved 1 Hz rate Tested with 3.7M actuations in 12 weeks Wearing problem

7. DPNC Sept 2007Jean-Sébastien GraulichSlide 7 Technical Design Focus coils and LH2 Absorbers Coupling coils and RF Cavities Solenoids, Matching coils and Scintillating fiber Tracker

8. DPNC Sept 2007Jean-Sébastien GraulichSlide 8 Absorbers and RFCC  Absorbers Module developed at KEK and tested at MuCool Test Area Double wall all around LH2 Module presently out for tender SC Focus coils needed to have minimum bT function in the absorber  RFCC 201.25 MHz cavities, cupper water cooled 1 module compensates for Energy loss in the absorber 8 MV/m E-Field in a few Tesla B-Field RF Background has been simulated and is now being measured at MTA Detailed Design nearly finished Coupling coil will be produced in Harbin, China

9. DPNC Sept 2007Jean-Sébastien GraulichSlide 9 Spectrometer  5 stations of scintillating fibers  3 projections per station  Two layers, each 350  m diameter  Minimize material in beam line Few photons VLPC readout (same as D0) QE = 85%, gain = 50000, dedicated FEE  Simulated Performance  P T = 1.5 MeV/c  P Z = 3 MeV/c for 200 MeV/c muons, mean P T @ B ~ 4T

10. DPNC Sept 2007Jean-Sébastien GraulichSlide 10 Experimental Hall Critical area now closed Time of Flight Stations Cherenkov Counters Electron-Muon Calorimeter Cooling channel

11. DPNC Sept 2007Jean-Sébastien GraulichSlide 11 PID  TOF Made of crossed scintillator slabs, 1” thick, conventional PMTs 70 ps resolution TOF0-TOF1 allow pion rejection. TOF1-TOF2 allow electron rejection 3.6 o resolution in RF phase and 6D emittance measurement TOF1 and TOF2 PMTs need heavy iron shields (against B).  Cherenkov Two aerogel Cherenkov, 8” PMTs refractive index: 1.07 and 1.12 Pion rejection at large momentum clean low momentum e + sample CKOV_A being assembled @ RAL Cosmic ray test for CKOV, TOF and DAQ planned EMI-9056 KA, 8” PMT Cherenkov Unit

12. DPNC Sept 2007Jean-Sébastien GraulichSlide 12 Electron-Muon Calorimeter  Two Parts: 4 cm preshower layer: grooved lead foils + scintillating fibers, forces electrons to shower 10 layers of plastic scintillators: measure energy, range and track integrity  Design proposed by Geneva Based on detailed simulation  Part 1 nearly finished  Part 2 being prototyped Use extruded scintillators + WLS fibers Considering Light Detection by SiPM (or Hamamatsu MPPC) New technology Very Promising

13. Aspirational MICE Schedule - July 2007 January 2008 Stage 1 April 2008 Stage 3 July 2008 Stage 2 Stage 4 Delivery of 1st FC May 2009 Stage 5 summer 2009 Stage 6 end 2009

14. DPNC Sept 2007Jean-Sébastien GraulichSlide 14 Geneva in MICE  Management: A. Blondel re-elected as spokesmouse  Simulation / Design: Rikard’s thesis on RF Background and PID in MICE Detailed analysis on how the PID bias the emittance measurement  Trigger and DAQ Vassil And Myself working on Readout Code Data Storage Trigger logic Synchronization between Target, RF and DAQ

15. DPNC Sept 2007Jean-Sébastien GraulichSlide 15 Summary  MICE is part of the Neutrino Factory R&D program  Aims at demonstrating that it’s possible to design, engineer, and build a section of cooling channel giving the desired performances  MICE is using particle physics detectors to perform high precision emittance measurement by muon per muon tracking  Construction is underway at RAL Staged start-up, starting soon with Particle Detectors commissioning  First beam this winter  Final results by 2010

16. DPNC Sept 2007Jean-Sébastien GraulichSlide 16 Collaborators  Bulgaria University of Sofia  China The Harbin Institute for Super Conducting Technologies  Italy INFN Milano, INFN Napoli, INFN Pavia INFN Roma III INFN Trieste  Japan KEK Kyoto University Osaka University  USA Argonne National Laboratory, Brookhaven National Laboratory Fairfield University University of Chicago Fermilab Illinois Institute of Technology Jefferson Lab Lawrence Berkeley National Laboratory UCLA, Northern Illinois University University of Iowa University of Mississippi UC Riverside University of Illinois at Urbana-Champaign  Switzerland CERN Geneva University Paul Scherrer Institute  UK Brunel Cockcroft/Lancaster Glasgow Liverpool ICL London Oxford Darsbury RAL Sheffield  The Netherlands NIKHEF,