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Neutrino Factory: Japanese Scenario and Muon Programs

Highlights and personal impressions from the 5th International Workshop on Neutrino Factories and Superbeams, including the Japanese Scenario and Muon Physics Programs. Discusses the PRISM muon source, target studies, RF studies, and the World Study III initiative. Explores the prospects of MICE and the beta beam as alternatives to the Neutrino Factory.

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Neutrino Factory: Japanese Scenario and Muon Programs

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  1. NuFact 03 5th International Workshop on Neutrino Factories & Superbeams Columbia University, New York 5-11 June 2003 Highlights and personnal impressions part III acelerator http://www.cap.bnl.gov/nufact03/

  2. Neutrino Factory: the Japanese Scenario now more thoroughly simulated based on FFAG physics all the way: low E muons g-2 muons, low energy NuFact, 20 GeV NUFACT… Other notable difference wrt US and EU scheme Energy for capture is higher (0.4 +- 0.2 kinetic GeV) (50 GeV proton source + optimization) SUPPORTED! Ekin Time COOLING is not necessary…. but brings a factor in intensity of >> 2! Japan (Osaka & KEK) are active members of MICE!

  3. Muon Physics Programs & Staging Scenario • High Power Proton Driver • Muon g-2 • Pion Capture (MECO) • Muon LFV Physics outcomes at each stage • Muon Factory (PRISM) • Muon LFV • Muon Factory-II (PRISM-II) • Muon EDM • Muon g-2 • Neutrino Factory • Muon Collider

  4. NB: a standard cyclotron would be MUCH smaller and inexpensive but would have much smaller acceptance and could not be scaled up to higher energies. Yoshi Mori

  5. Yoshi Mori

  6. PRISM PRISM ring construction has been approved. PRISM=Phase Rotated Intense Slow Muon source • Specifications • muon intensity: 1011~1012 /sec • central momentum: 67-120 MeV/c • momentum width: 3 % (<--- 30 %） • phase rotation approx 5 M$

  7. US MC (Neutrino Factory and Muon Collider collaboration) highlights *** target studies already advertised. mercury jet in beam mercury jet in B field to get both is a problem: where and how????  JHF / Isolde… ***RF studies in magnetic fields Important for MICE (rf noise in spectrometer) Important for NUFACT (cooling channel with high emittance muon beam going through RF while being contained in magnetic field (phase rotation or cooling) studies so far with 800 MHz, construction of 200 MHz cavity now started! nice study of cooling in gas H2 filled cavities. (R. Johnson) *** replace induction linacs with RF phase rotation (Neuffer) (cost saving!) *** cooling rings works (on paper)! main problem : the injection and ejection kicker

  8. US MC (Neutrino Factory and Muon Collider collaboration)

  9. sizeable improvement in the level of dark current using Be windows

  10. Kicker studies (Palmer)

  11. TOWARDS WORLD STUDY III Rob Edgecock took initiative (triggered by MUG) to initiate a ‘world study III … trigger is EU FP6 design study request. … all three regions agree to collaborate. Aim is: 1. Design Report by LHC start up. 2. reduce cost of neutrino factory by factor of 2. steering group formed etc….

  12. MICE •  Experiment passed International Peer Review Panel successfully • ‘strongly recommends approval’ •  Experiment under funding review in the UK: [10 M£ or 15 M£] • this means we will be going around looking for cryogenics, RF power sources, beam magnets, etc… • RAL management has authorized construction work to begin in the experimental hall at RAL MICE IS HAPPENING!

  13. If funding is adequate, the following sequence of events can be envisaged: m - STEP I: 2006 STEP II: summer 2006 STEP III: winter 2007 STEP IV: spring 2007 STEP V: fall 2007 STEP VI: 2008

  14. NUFACT03 Highlights first results from miniboone first results from MUSCAT! theta13 prospectives (reactor proposals!) the issue of degeneracies beta beam getting close in performance to neutrino factory?! Nufact: death of bow-tie machine part: MICE strongly recommended – in approval path status of target status of RF cavity studies status of accelerator design FFAG!!!! Cooling ring!!!! to cool or not to cool? cost saving hopes WORLD STUDY III synergies: emphasis on low energy muon and high intensity physics personnal reflexions: Europe’s strengths two avenues for Europe: when should we chose?

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