1 / 30

MICE & nuSTORM

1/30. V. Blackmore: MICE & nuSTORM. 13/09/14. &. MICE & nuSTORM. V. Blackmore University of Oxford v.blackmore1@physics.ox.ac.uk Neutrino Oscillation Workshop September 13 th , 2014. 2/30. V. Blackmore: MICE & nuSTORM. 13/09/14. Talk Overview. Motivation Why do we need cooling?

boris
Download Presentation

MICE & nuSTORM

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. 1/30 V. Blackmore: MICE & nuSTORM 13/09/14 & MICE & nuSTORM V. Blackmore University of Oxford v.blackmore1@physics.ox.ac.uk Neutrino Oscillation Workshop September 13th, 2014

  2. 2/30 V. Blackmore: MICE & nuSTORM 13/09/14 Talk Overview • Motivation • Why do we need cooling? • The anatomy of MICE • Progress towards Steps IV and V* • Muon beams for the busy physicist • nuSTORM • -nucleon scattering cross-sections • Sterile searches • Contributions to future facilities *comments later

  3. 3/30 V. Blackmore: MICE & nuSTORM 13/09/14 A Machine for CPV Discovery [2] P. Coloma, P. Huber, J. Kopp & W. Winter, 2012 [1] CKMfitter Collaboration, 2014

  4. 4/30 V. Blackmore: MICE & nuSTORM 13/09/14 Neutrino Factory Front End Muon Source Acceleration Decay Ring Cartoon based on IDS-NF design 2.8—10 GeV 0.8—2.8 GeV Proton driver (linac option) Phase Rotation Decay Channel to 0.8 GeV Buncher Cooling Target Muon decay ring 562 m Source Oscillation Detection CC CC CC CC Also available to use as a ‘superbeam’

  5. 5/30 V. Blackmore: MICE & nuSTORM 13/09/14 Muon Cooling Area emittance, Accelerator only accepts in this area • Reduce by defying Lioville’s theorem, • Requires a non-conservative force • Muon lifetime limits options • Ionisation cooling is the solution Liouville’s theorem conserves phase space

  6. 6/30 V. Blackmore: MICE & nuSTORM 13/09/14 Sustainable Ionisation Cooling Ionisation Cooling Multiple scattering Measure a change in emittance

  7. 7/30 V. Blackmore: MICE & nuSTORM 13/09/14 Muon Ionisation Cooling Experiment MICE • Goal: Demonstration of sustainable ionisation cooling (Step V) • Progress: Measurements of material properties and their influence on cooling (Step IV)

  8. beam and PID upstream 8/30 MICE Step V • Measure beam in Upstream Spectrometer Solenoid • 4T solenoid field • 5 SciFi tracker planes • Determine 1600 4 1400 2 (mm) (T) 0 800 -2 400 -4 204 6.0 200 5.8 (mm) (MeV/) 5.6 196 192 5.4 -4000 -2000 0 2000 4000 (mm)

  9. beam and PID upstream 9/30 MICE Step V • 2. Reduce momentum vector in 1st absorber (LH2 or LiH). • Maximal reduction at small • Reduces 1600 4 1400 2 (mm) (T) 0 800 -2 400 -4 204 6.0 200 5.8 (mm) (MeV/) 5.6 196 192 5.4 -4000 -2000 0 2000 4000 (mm)

  10. beam and PID upstream 10/30 MICE Step V • 3. Restore longitudinal momentum in RF cavities • remains constant • Sustainable cooling 1600 4 1400 2 (mm) (T) 0 800 -2 400 -4 204 6.0 200 5.8 (mm) (MeV/) 5.6 196 192 5.4 -4000 -2000 0 2000 4000 (mm)

  11. beam and PID upstream 11/30 MICE Step V • 4. Reduce momentum vector in 2nd absorber (LH2 or LiH). • Maximal reduction at small • Reduces 1600 4 1400 2 (mm) (T) 0 800 -2 400 -4 204 6.0 200 5.8 (mm) (MeV/) 5.6 196 192 5.4 -4000 -2000 0 2000 4000 (mm)

  12. beam and PID upstream 12/30 MICE Step V • Measure beam in Downstream Spectrometer Solenoid • 4T solenoid field • 5 SciFi tracker planes • Determine final 1600 4 1400 2 (mm) (T) 0 800 -2 400 -4 204 6.0 200 5.8 (mm) (MeV/) 5.6 196 192 5.4 -4000 -2000 0 2000 4000 (mm)

  13. 13/30 V. Blackmore: MICE & nuSTORM 13/09/14 Progress: Step IV Measurements of material properties and their influence on cooling • Characterise input beam [3] • Understand effect of material on beam emittance • No RF, 1 absorber module • Understand sustainable ionisation cooling • With RF, 2 absorber modules 2015 2017 Entering final stages of construction, data-taking to begin early 2015

  14. 14/30

  15. 15/30 V. Blackmore: MICE & nuSTORM 13/09/14 MICE Summary MICE RF Cavity at Fermilab * Recent DOE review of MAP/MICE recommended a demonstration of sustainable ionisation cooling by 2017. The collaboration is evaluating the options by which this can be achieved, including a simplified “Step ” configuration

  16. 16/30 V. Blackmore: MICE & nuSTORM 13/09/14 What does the impatient physicist do? Front End Muon Source Acceleration Decay Ring Cartoon based on IDS-NF design 2.8—10 GeV 0.8—2.8 GeV Proton driver (linac option) Phase Rotation Decay Channel to 0.8 GeV Buncher Cooling Target Muon decay ring 562 m 1 2 3 Simplify Skip Shrink p p Neutrino beam m Target Muon Decay Ring n 170 m

  17. 17/30 [4] CERN North Area from STORedMuons nuSTORM

  18. 18/30 V. Blackmore: MICE & nuSTORM 13/09/14 nuSTORM • Delivers beams of from the decay of 3.8 GeV stored • Known flavour composition and <1% neutrino flux precision • Precise CP-conjugate beams from storing and • Can access all of these channels with % or better accuracy: p p Neutrino beam m Target Muon Decay Ring n 170 m

  19. 19/30 V. Blackmore: MICE & nuSTORM 13/09/14 The nuSTORM Triangle NF/HEP muon accelerator proving ground Precision cross-section measurements Definitive measurement of sterile neutrinos

  20. 20/30 V. Blackmore: MICE & STORM 13/09/14 The nuSTORM Triangle NF/HEP muon accelerator proving ground Precision cross-section measurements Definitive measurement of sterile neutrinos

  21. 21/30 V. Blackmore: MICE & nuSTORM 13/09/14 cross-sections at nuSTORM [6] P. Huber, M. Mezzetto, T. Schwetz • Negligible cross-section measurements at accelerator energy regimes • Significant differences between and cross-sections below 1GeV • cross-sections are essential for CP sensitivity in appearance experiments

  22. 22/30 V. Blackmore: MICE & nuSTORM 13/09/14 cross-sections at nuSTORM [6] P. Huber, M. Mezzetto, T. Schwetz • Only nuSTORM can provide 1% level of precision • Intense source • Well known fluxes • sources • and

  23. 23/30 [2] P. Coloma, P. Huber, J. Kopp & W. Winter, 2012 Performance with nuSTORM Without cross-section measurements from nuSTORM With cross-section measurements from nuSTORM Superbeams close in on CKM-level precision

  24. 24/30 V. Blackmore: MICE & nuSTORM 13/09/14 The nuSTORM Triangle NF/HEP muon accelerator proving ground Precision cross-section measurements Definitive measurement of sterile neutrinos

  25. 25/30 V. Blackmore: MICE & nuSTORM 13/09/14 Neutrino oscillations at nuSTORM From J. Spitz, “Searches for Sterile Neutrino Mixing”, nuFACT 2014

  26. 26/30 V. Blackmore: MICE & nuSTORM 13/09/14 Neutrino oscillations at nuSTORM [5] The nuSTORM collaboration [4] ThenuSTORM collaboration Far Detector @ 2km • “Wrong sign muon” oscillation signal • Requires magnetised detector • CPT conjugate of LSND • Sensitive to current best fit to at level

  27. 27/30 V. Blackmore: MICE & nuSTORM 13/09/14 The nuSTORM Triangle NF/HEP muon accelerator proving ground Precision cross-section measurements Definitive measurement of sterile neutrinos

  28. 28/30 V. Blackmore: MICE & nuSTORM 13/09/14 Muon Proving Ground Muon Proving Ground Front End Muon Source Acceleration Decay Ring Cartoon based on IDS-NF design 2.8—10 GeV 0.8—2.8 GeV Proton driver (linac option) Phase Rotation Decay Channel to 0.8 GeV Buncher Cooling Target Muon decay ring 562 m 1 2 3 Physics! Physics! Physics! p p Neutrino beam m Target Muon Decay Ring n 170 m

  29. 29/30 V. Blackmore: MICE & nuSTORM 13/09/14 Summary • Muon-based neutrino beams are essential for precision measurement of CP. • High-energy muon sources require a demonstration of sustainable ionisation cooling (MICE) • Influence of material parameters: 2015 • Sustainable cooling: 2017 • nuSTORM requires no cooling and uses existing technology – could be built today. • Supports future neutrino oscillation programs by providing precision measurements of -N cross sections (plus ) • level sensitivity to sterile • Large step forward towards muon accelerators as a powerful new tool for particle physics

  30. 30/30 V. Blackmore: MICE & nuSTORM 13/09/14 References [1] CKMfitterCollaboration, Preliminary results as of Winter 2014 (Moriond conference) [2] P. Coloma, P. Huber, J. Kopp & W. Winter, Systematic uncertainties in long-baseline neutrino oscillations for large , arXiv:1209.5973 [3] The MICE Collaboration, Characterisation of the muon beams for the Muon Ionisation Cooling Experiment, EPJC, DOI: 10.1140/epjc/s10052-013-2582-8 [4] The nuSTORM Collaboration, Neutrinos from Stored Muons, nuSTORM, Expression of Interest to CERN, arXiv:1305.1419, Proposal to Fermilab, arXiv:1308.6822 [5] D. Adeyet al (the nuSTORM collaboration), Phys. Rev. D 89, 071301(R), Light sterile neutrino sensitivity at the nuSTORM facility (arXiv: 1402.5250) [6] P. Huber, M. Mezzetto, T. Schwetz, On the impact of systematical uncertainties for the CP violation measurement in superbeam experiments, arXiv:0711.2950

More Related