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Neutrino Factory: Physics, detectors and machine

K. Long 03Apr01. Neutrino Factory: Physics, detectors and machine. Neutrino Factory Panel: G. Barr, P. Drumm, R. Edgecock, S. King, K. Long, J. Stirling, J. Thomas, D. Wark. Physics at the Neutrino Factory - develop IPPP workshop series

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Neutrino Factory: Physics, detectors and machine

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  1. K. Long 03Apr01 Neutrino Factory: Physics, detectors and machine Neutrino Factory Panel:G. Barr, P. Drumm, R. Edgecock, S. King, K. Long, J. Stirling, J. Thomas, D. Wark • Physics at the Neutrino Factory- develop IPPP workshop series • Neutrino Factory accelerator complex- essential to develop strong UK contribution • Neutrino detectors - opportunity for UK to establish leadership • High Intensity Muon Facility - Opportunity for UK to provide world-class facility Acknowledgements: Greatly indebted to S. Blundell (Oxford) for education on SR and many helpful conversations with many colleagues

  2. The Neutrino Factory accelerator complex Interim report

  3. The Neutrino Factory - an ambitious schedule 04/05 09/10 2001 06/07 Proof of principle Development of instrumentation Conceptual/technical design report Dedicated Fct R&D facility Start construction! Interim report

  4. Physics at the Neutrino Factory Neutrino oscillations Neutrino Factory Physics reach Interim report

  5. The Neutrino Factory accelerator complex Interim report

  6. The neutrino factory accelerator complex Proton driver High power, pulsed H- beam Ideal UK contribution to Neutrino Factory • Contributions to date: • Design of accumulator/compressor rings in CERN design • - RAL (Rees), RAL/Ox (Prior) • Design of rapid cycling synchrotrons for CERN, FNAL and RAL • - RAL (Rees), RAL/Ox (Prior) RAL 4 MW proton beam Interim report

  7. The neutrino factory accelerator complex Proton driver • Proton driver R&D programme: • High current, low energy H- beam transport • RFQ and chopper development • Efficient, reliable, pulsed RF power sources - ‘inductive output tubes’ • SC RF-cavity development • Beam diagnostics • Investment required for 02-04: • 5 FTEs • Equipment (especially for IOT and RF-cavity development) Marconi Interim report

  8. The neutrino factory accelerator complex Targetry • Requirements: • Dissipate ~1 MW of beam power • Target must ‘allow pions out’ • Options under consideration: • Liquid metal (mercury) jet • Solid metal target (balls, bullets, bands) • Contributions to date: • Design of rotating solid metal band target with magnetic levitation and drive • - RAL (Densham, Drumm, Bennett) • Particle production yields - the HARP experiment • - 11 UK authors from RAL, Oxford, Sheffield RAL Interim report

  9. The neutrino factory accelerator complex Targetry • Targtry R&D programme: • Determine response of suitable materials to high intensity pulsed charged particle beams • Electron beams - high power welding machines (started) • Proton beams - ISOLDE (CERN), Brookhaven or ISIS • Develop and test magnetic levitation and drive system Possible UK contribution to Neutrino Factory if we can show solution is practical and can demonstrate that it is superior to the liquid metal jet targets • Investment required for 02-04: • Four FTEs • Equipment and beam tests Interim report

  10. SC-magnets, pion capture The neutrino factory accelerator complex • Magnets found throughout Neutrino Factory accelerator complex • Modest R&D programme in collaboration with UK industry would place UK and UK industry in a position to bid to supply a substantial number of magnets • Contributions to date: • Design of a pion capture system based on large aperture dipole magnets • - RAL (Rees) • CERN (Haseroth) UK (Bainham, RAL) contact being established • The ‘Magnet Challenge’ • Capture magnet:large aperture, high tapering field (20T  1.25T) • Decay channel:30 cm bore, 1.25T, channel 30-50m in length • Cooling channel:large aperture, high field (2.5-5T), channel 150-200m in length • Investment required for 02-04: • Three FTEs • Equipment and beam tests Interim report

  11. The neutrino factory accelerator complex Cooling CERN cooling channel - schematic Ionisation cooling - principle Interim report

  12. The neutrino factory accelerator complex Cooling Possible cooling cell from FNAL design • Ionisation cooling has not been demonstrated either in principle or in practice • Essential to demonstrate that cooling from dE/dx beats heating from MCS • Essential to demonstrate that complicated hardware of cooling channel can cool and can operate in challenging environment of the production channel Requires dedicated programme of measurement Interim report

  13. The neutrino factory accelerator complex Cooling • Contributions to date: • MUSCAT experiment to measure MCS • - Brm/IC/RAL (Edgecock et al) • Proposed upgrade to MUSCAT experiment to measure dE/dx and demonstrate principle of cooling • - Brm/IC/OX/RAL • Strong contributions to discussions of design/instrumentation of engineering demo and specification of beam (or beams) required to carry it out • Investment required for 02-04: • Carry out MUSCAT upgrade: • Sci. Fi. detector development • Liquid hydrogen target Interim report

  14. The neutrino factory accelerator complex Cooling Engineering demonstration • Opportunity for UK leadership: • Establish R&D into instrumentation (most likely sci. fi. trackers) establish a concept/design for cooling demo and for production cooling channel • Position UK to bid to provide instrumentation for cooling demo (03-04) and production channel (04-07) • Investment required 02-04: 4 FTEs Interim report

  15. Neutrino Detectors The Far Detector • Need to develop novel solutions: • Muons: very large mass magnetic detector (cost) • Electron charge determination in large mass detector • Tau identification and charge determination • Minimal requirements: • > 50 kTon • /e separation • Muon charge determination • e detection increases potential and is required for T • e charge determination •  appearance requires •  identification • Opportunity for UK leadership: • Establish R&D into detector in order to identify key technologies and establish a detector concept/design in collaboration with UK industry • Position UK to provide technological solutions and bid to provide significant fraction of detector in period 04-07+ • Investment required 02-04: 2 FTEs Interim report

  16. Neutrino detectors The Near Detector • Need to develop detector concept: • Low mass, high rate neutrino detector - within UK competence (cost?) • An apparatus similar in concept to LHC-b is required • Polarised target • Near detector requirements: • Muon/electron separation and charge determination for NC, CC cross section measurement • Charm tagging through precision vertex detector (e.g. silicon) • Particle identification (e.g. K//p separation) • Background rejection: active/passive shield, excellent time resolution • Opportunity for UK leadership: • Establish R&D into detector in order to identify key technologies and establish a detector concept/design in collaboration with UK industry • Position UK to provide technological solutions and bid to provide significant fraction of detector in period 04-07+ • Investment required 02-04: 2 FTEs Interim report

  17. High Intensity Muon Facility • A dedicated, high intensity, muon facility is required to: • Perform engineering demonstration of ionisation cooling • Prototype and bench-test systems proposed for pion production, pion/muon capture and phase rotation • Essential requirements of High Intensity Muon Facility: • An essentially cw beam of 103 - 104 Hz to demonstrate cooling channel works in principle • An intense, bunched beam (109 - 1011 per 5 ns bunch) to demonstrate cooling of a bunched beam, demonstrate performance of phase rotation and capture systems • A high intensity (1013 p/bunch) beam (protons) to perform ‘blast test’ - i.e. demonstrate that elements of cooling channel can operate in intense radiation environment Identified by Fct community world-wide at NuFact00 as essential for progress cf TTF (DESY), FFTB (SLAC) and CLIC-TF (CERN) ISIS has highest current density proton beam making it an ideal place to provide the High Intensity Muon Facility Interim report

  18. High Intensity Muon Facility P. Drumm (RAL) • Opportunity for UK leadership: • Pressing need for HIMF through-out Fct community: CERN goal is to mount engineering demo ~2005 • ISIS unique. UK opportunity to provide world-class facility • Investment required 02-04: £25M Interim report

  19. Summary of recommended UK R&D for Fct in period 2002-2004 Interim report

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