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Staging of a Neutrino Factory (and beyond…) Mark Palmer Director, US Muon Accelerator Program NuFACT 2014, Glasgow, August 25-30, 2014 NUFACT2014 XVIth.

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Presentation on theme: "Staging of a Neutrino Factory (and beyond…) Mark Palmer Director, US Muon Accelerator Program NuFACT 2014, Glasgow, August 25-30, 2014 NUFACT2014 XVIth."— Presentation transcript:

1 Staging of a Neutrino Factory (and beyond…) Mark Palmer Director, US Muon Accelerator Program NuFACT 2014, Glasgow, August 25-30, 2014 NUFACT2014 XVIth International Workshop on Neutrino Factories and Future Neutrino Facilities

2 Muon Accelerators for HEP  – an elementary charged lepton: –200 times heavier than the electron –2.2  s lifetime at rest Physics potential for the HEP community using muon beams –Tests of Lepton Flavor Violation –Anomalous magnetic moment  hints of new physics (g-2) –Can provide equal fractions of electron and muon neutrinos at high intensity for studies of neutrino oscillations – the Neutrino Factory concept –Offers a large coupling to the “Higgs mechanism” –As with an e + e − collider, a  +  − collider would offer a precision leptonic probe of fundamental interactions Aug 28, 2014NuFACT 20142

3 Outline Why Neutrino Factories? Neutrino Factory Concepts –Short baseline  STORM –Long Baseline The IDS-NF Reference Design Options for a staged implementation: –The MAP Muon Accelerator Staging Study –The staged NuMAX Concept –Accelerator R&D Needs Going Beyond a Neutrino Factory Facility –Possibilities for a future Muon Collider Capability Conclusion Aug 28, 2014NuFACT 20143

4 WHY NEUTRINO FACTORIES? Aug 28, 2014NuFACT 20144

5 The Key Issues Aug 28, 2014NuFACT 20145 What things must we understand in the neutrino sector? –  CP –The mass hierarchy –The value of  23 -  /4: +, - or zero? –Resolve the LSND and other short baseline experimental anomalies –And enable the search for new physics

6 Neutrino Factory  Precision CP violation physics reach of various facilities Can we probe the CP violation in the neutrino sector at the same level as in the CKM Matrix? Aug 28, 2014NuFACT 20146 P. Coloma, P. Huber, J. Kopp, W. Winter – arxiv:1209.5973 0.025 IDS-NF: 700kW target, no cooling, 2×10 8 s running time 10-15 kTon detector

7 Microscopes for the Sector Superbeam technology will continue to drive initial observations in the coming years However, anomalies and new discoveries will drive our need for precision studies to develop a complete physical understanding Neutrino Factory capabilities (both long- and short- baseline) offer a route to controlled systematics and precision measurements to fully elucidate the relevant physics principles  Precision Microscopes for the sector Aug 28, 2014NuFACT 20147

8 NEUTRINO FACTORY CONCEPTS Aug 28, 2014NuFACT 20148

9 Neutrino Factory Overview Short Baseline NF –nuSTORM Definitive measurement of sterile neutrinos Precision e cross-section measurements (systematics issue for long baseline SuperBeam experiments) Would serve as an HEP muon accelerator proving ground… Long Baseline NF with a Magnetized Detector –IDS-NF (International Design Study for a Neutrino Factory) 10 GeV muon storage ring optimized for 1500-2500km baselines “Generic” design (ie, not site-specific) –NuMAX (Neutrinos from a Muon Accelerator CompleX) Site-specific: FNAL  SURF (1300km baseline) 4-6 GeV beam energy optimized for CP studies –Flexibility to allow for other operating energies Can provide an ongoing short baseline measurement option Detector options –Magnetized LAr is the goal –Magnetized iron provides equivalent CP sensitivities using ~3x the mass Aug 28, 2014NuFACT 20149

10 STORM  decay ring: P = 3.8 GeV/c ± 10% 10 Near Hall Far Hall @1.9km Far Detector To Far Hall Aug 28, 2014NuFACT 2014 See talk by J-B. Lagrange Neutrino Physics Session: Friday 16:00 No new technologies required! Could be deployed now! No new technologies required! Could be deployed now!

11 Example of Potential STORM Leverage for Long Baseline Experiments: T2HK Aug 28, 2014NuFACT 201411 NuMAX+ targets equivalent sensitivity to CP violation in the sector as has been achieved in the flavor sector GLoBES Comparison of Potential Performance of the Various Advanced Concepts (courtesy P. Huber) nuSTORM + T2HK offers significantly improved sensitivity vs T2HK alone

12 Storm as an R&D platform A high-intensity pulsed muon source 100<p μ <300 MeV/c muons –Using extracted beam from ring –10 10 muons per 1 μ sec pulse Beam available simultaneously with physics operation STORM also provides the opportunity to design, build and test decay ring instrumentation (BCT, momentum spectrometer, polarimeter) to measure and characterize the circulating muon beam Aug 28, 2014NuFACT 201412

13 The Long Baseline Neutrino Factory IDS-NF: the ideal NF –Supported by MAP MASS working group: A staged approach - NuMAX@5 GeV  SURF Aug 28, 2014NuFACT 201413

14 The MAP Muon Accelerator Staging Study  NuMAX Aug 28, 2014NuFACT 201414 NuMAX Staging: Commissioning  1MW Target  No Cooling  10kT Detector NuMAX+  2.75 MW Target  6D Cooling  34kT Detector NuMAX Staging: Commissioning  1MW Target  No Cooling  10kT Detector NuMAX+  2.75 MW Target  6D Cooling  34kT Detector

15 NF Staging (MASS) 6D Aug 28, 2014NuFACT 201415

16 LBNF Superbeam ft Muon Beam R&D Facility Possible to deploy subsequent muon collider capabilities 1 GeV Muon Linac (325MHz) To SURF 0.8 GeV Proton Linac (PIP-II) 3-7 GeV Proton & 1-5 GeV Muon Dual Species Linac 0.8-3 GeV Proton Linac (PIP-III) To Near Detector(s) for Short Baseline Studies Possibilities for NF Capabilities at Fermilab: STORM  NuMAX Front End Target Accumulator, Buncher, Combiner Initial Cool 6D Cool Final Cool Remains fully compatible with the PIP-II  III staging option Aug 28, 2014NuFACT 201416

17 Staged Performance of NuMAX NuFACT 201417 GLoBES Comparison of Potential Performance of the Various Advanced Concepts (courtesy P. Huber) Aug 28, 2014

18 Accelerator R&D Effort (U.S. MAP) Design Studies –Proton Driver –Front End –Cooling –Acceleration and Storage –Collider –Machine-Detector Interface –Work closely with physics and detector efforts Technology R&D –RF in magnetic fields –SCRF for acceleration chain (Nb on Cu technology) –High field magnets Utilizing HTS technologies –Targets & Absorbers –MuCool Test Area (MTA) Aug 28, 2014NuFACT 201418 Major System Demonstration –The Muon Ionization Cooling Experiment – MICE Major U.S. effort to provide key hardware: RF Cavities and couplers, Spectrometer Solenoids, Coupling Coil(s), Partial Return Yoke Experimental and Operations Support

19 MICE Experiment @RAL Aug 28, 2014NuFACT 201419 MICE Step IV: Study of Absorber Materials 2015 Data MICE Step V: Demonstration of Muon Cooling w/RF re-acceleration Commission in 2017 (expedited schedule) US US-UK See following talk by Ken Long

20 GOING BEYOND NEUTRINO FACTORY CAPABILITIES Aug 28, 2014NuFACT 201420

21 Features of the Muon Collider Superb Energy Resolution –SM Thresholds and s-channel Higgs Factory operation Multi-TeV Capability (≤ 10TeV): –Compact & energy efficient machine –Luminosity > 10 34 cm -2 s -1 –Option for 2 detectors in the ring For √s > 1 TeV: Fusion processes dominate  an Electroweak Boson Collider  a discovery machine complementary to a very high energy pp collider –At >5TeV: Higgs self-coupling resolutions of <10% What are our accelerator options if new LHC data shows evidence for a multi-TeV particle spectrum? Aug 28, 2014NuFACT 201421

22 22 Muon Colliders extending high energy frontier with potential of considerable power savings Aug 28, 2014 NuFACT 2014 J.-P. Delahaye

23 NF/MC Synergies Aug 28, 2014NuFACT 201423

24 The Staging Study (MASS) Aug 28, 2014NuFACT 201424 Enabling Intensity and Energy Frontier Science with a Muon Accelerator Facility in the US - http://arxiv.org/pdf/1308.0494 Ability to utilize some or all stages

25 LBNE Superbeam ft Muon Beam R&D Facility A 6 TeV Muon Collider would have a similar circumference as the Tevatron Ring 1 GeV Muon Linac (325MHz) To SURF 0.8 GeV Proton Linac (PIP-II) 3-7 GeV Proton & 1-5 GeV Muon Dual Species Linac 0.8-3 GeV Proton Linac (PIP-III) To Near Detector(s) for Short Baseline Studies Concept for a Muon Accelerator Complex at Fermilab: STORM  NuMAX  Higgs Factory and Beyond Front End Target Accumulator, Buncher, Combiner Initial Cool 6D Cool Final Cool Remains fully compatible with the PIP-II  III staging option RLA to 63 GeV Aug 28, 2014NuFACT 201425

26 Aug 28, 2014NuFACT 201426 Concept for a Muon Accelerator Complex at Fermilab:  Multi-TeV Lepton Collider Concept for a Muon Accelerator Complex at Fermilab:  Multi-TeV Lepton Collider SC Linac A TeV-Scale Accelerator System

27 Muon Collider Parameters Aug 28, 2014NuFACT 201427 Site Radiation mitigation with depth and lattice design: ≤ 10 TeV Success of advanced cooling concepts  several × 10 32 Exquisite Energy Resolution Allows Direct Measurement of Higgs Width

28 CONCLUSION Aug 28, 2014NuFACT 201428

29 Concluding Remarks Neutrino Factory capabilities offer the precision microscope that will likely be needed to fully probe the physics of the neutrino sector For the last 3 years US Muon Accelerator Program has pursued options to deploy muon accelerator capabilities –Near term ( STORM) –Long term (NuMAX) –Along with the possibility of a follow-on muon collider option In light of the recent P5 recommendations that this directed facility effort no longer fits within the budget- constrained US research portfolio, the US effort is entering a ramp-down phase Nonetheless, the precision capabilities offered by Neutrino Factories represent a key option for the future of physics Aug 28, 2014NuFACT 201429

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