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Milorad Popovic MAP Meeting May, 2015

Opportunities for Experiments Based on Stored Muon Beams at Fermilab (in next ~5-10 years, for ~3-20M$). Milorad Popovic MAP Meeting May, 2015. Motivation. 2. Measure neutrino cross-section with better than 10% precision

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Milorad Popovic MAP Meeting May, 2015

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  1. Opportunities for Experiments Based on Stored Muon Beams at Fermilab(in next ~5-10 years, for ~3-20M$) Milorad Popovic MAP Meeting May, 2015

  2. Motivation 2 Measure neutrino cross-section with better than 10% precision Take advantage of the existing accelerator complex configuration providing beam to the New Muon g-2 Experiment Utilize existing detectors (MicroBooNE, ICARUS) Minimize initial investment. Providing a suitable building to house the detector would be the only investment required Describe possible improvements in collecting and storing muons that would allow cross-section measurements with a precision of a few percent with a modest additional investment. Provide a suitable test facility for future NF December 5, 2014

  3. Muon Campus = Mu2e + g-2 + ??? p/m g-2 Mu2e n 3

  4. Proton Beam Like for g-2,but with g-2 off • 5x1012 protons in a Booster pulse • 3 Hz, 8 GeV Booster • Muons are stored for ~100 turns • Running time 107 Sec (1 year) • 100 ton detector, 10 meters downstream from ring ~ 400 CC neutrino events This is for about the cost of moving an existing detector (mBooNE??, 60T) and building a new detector housing (about 3M$) 4 December 5, 2014

  5. Looking in the near future ( cost~$3M) • 1x1013 protons from MI (two Booster pulses slip stacked) • 1 Hz, 120 GeV MI • Muons are stored for ~100 turns • Running time 1year(2x107 Sec) • 100 ton detector, 10 meters downstream from ring ~ 2/3*120/8*2x400 8000 CC neutrino events So in 10 bins even if detector is only 50% efficient, cross section Can be measured with error less then 10% 5 December 5, 2014

  6. Looking Into the Future ( cost~$10M) • 1x1013 protons from MI (two Booster pulses, slip stacked) • 1 Hz, 120 GeV MI • Running time 1year(2x107 Sec) Fermilab year is ~2x107 Sec • Larger detector, ~500 ton detector( x5) ICARUS is 600 ton ~40000 CC neutrino events 6 December 5, 2014

  7. Looking Into the Future ( cost~$??) • 1x1013 protons from MI (two Booster pulses, slip stacked) • 1 Hz, 120 GeV MI • New Li lens r = 2 cm to increase collection of pi’s ( x1.5) CERN has made this size Lens • Make ring to be racetrack (x1.5x2) Provide a suitable test facility for future NF • Running time 1year(2x107 Sec) Fermilab year is ~2107 Sec • Larger detector, ~500 ton detector( x5) ICARUS is 600 ton ~100k CC neutrino events 7 December 5, 2014

  8. nuSTORM 8 December 5, 2014

  9. Questions ? The End 9 December 5, 2014

  10. How to get 100k events • In next year or two there will be stored muon beam at ~3 GeV/c in the storage ring with ~60 meters long straits (Debuncher ring as g-2 delay beam line). • There will be ~400 CC neutrino events in some imaginary 100 ton detector, 10 meters downstream from the one ring’s straits, running for 10^7 sec Booster at 3 Hz, 8 GeV beam(5x10^12 protons per pulse) and storing muons for 100 turns. • Numbers in point 2., are g-2 beam , and are just to establish reference point. • Running (two Booster batches stacked) 120 GeV beam from MI on the same target and using ICARAUS (600 ton) detector for 2x10^7 seconds (Fermilab year) will create 40000 CC neutrino events. • All this is for investment of ~10M$ in building to house detector and willingness to move ICARUS detector in suggested location! 10 December 5, 2014

  11. Questions ? 11 December 5, 2014

  12. Questions ? 12 December 5, 2014

  13. Questions ? 13 December 5, 2014

  14. SBN Program 14 August 15, 2014

  15. The Context 15 We revisit the idea of using the Debuncher as a storage ring for muons the g-2 Experiment expects 6x10-6 stored muons per 8 GeV proton on target December 5, 2014

  16. g-2 Experiment 16 Booster pulse(5x1012 Protons@ 8 GeV) is separated in 4 bunches (~100 ns long) in the Recycler The Booster is a 15 Hz machine (not all cycles are used) Target Station is AP0 (Antiproton production target station) and was run with beam power up to 72 kW ( 120 GeV beam from Main Injector) 3.1 GeV/c Pions/Muons are collected using Lithium Lens ( this lens was used for collection of 8.9 GeV/c Antiprotons with ~0.5 Hz) Debuncher is used as delay line for muons (beam is stored for 3 turns). Muons go to g-2 storage ring for experiment. December 5, 2014

  17. Concept: g-2 Experiment 6x10-6 stored muons in the Debuncher per 8 GeV proton on target 17

  18. G4BeamLine simulations of g-2 p after Li lens p after one turn Debuncher p at end of transfer line 18 December 5, 2014 • In simulation 1.4x1010 protons on AP0 target

  19. g-2 simulations 6x10-6 stored muons in the Debuncher per one 8 GeV proton on target m after Li lens m after one turn in Debuncher m at the end of transfer line 19 December 5, 2014

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