Magnetized Iron Neutrino Detector MIND

1. Magnetized Iron Neutrino DetectorMIND Technology & Engineering A. Bross, May 5, 2011

2. Outline • Basic concept • Technology choices • Engineering details • Where we are & where we are headed • R&D requirements • Costing • Conclusions A. Bross ECFA REVIEW 5 - 6 May, 2011

3. Basic Concept • MIND is an iron and scintillator sampling calorimeter which is essentially a Larger version of the MINOS detector Larger: » 20X A. Bross ECFA REVIEW 5 - 6 May, 2011

4. Iron plate14m X 14m X 3cm • Initial calculations indicated “hanging” stresses too large • Detailed plate design + ANSYS analysis • OK A. Bross ECFA REVIEW 5 - 6 May, 2011

5. Readout planes • X + Y views of scintillator extrusions between each plate (MINOS alternated, X or Y) • Wavelength shifting fiber readout • Solid-state photon detector Baseline: 3.5 X 1 cm A. Bross ECFA REVIEW 5 - 6 May, 2011

6. Engineering Details

7. Iron Plates • Two plate models were developed • One with 2m strips • One with 3m & 2m strips • Two layer (1.5 cm each), cross-strip design • Plug welded mosaic • Both yielded acceptable performance • Stresses • Buckling • Deformations A. Bross ECFA REVIEW 5 - 6 May, 2011

8. Iron Plate Designs 2m strip 2m & 3m strip A. Bross ECFA REVIEW 5 - 6 May, 2011

9. 3D Plate Design A. Bross ECFA REVIEW 5 - 6 May, 2011

10. Magnetization • Baseline is to use the superconducting transmission line (STL) developed/prototyped for the VLHC • 100kA-turn • 80 mm diameter • 100mm hole • Average r» 0.5g/cm3 A. Bross ECFA REVIEW 5 - 6 May, 2011

11. STL Test Stand A. Bross ECFA REVIEW 5 - 6 May, 2011

12. 10 cm dia hole for current A. Bross ECFA REVIEW 5 - 6 May, 2011

13. Azimuthal B-field 3-d Model With homogeneous iron A. Bross ECFA REVIEW 5 - 6 May, 2011

14. 3D B Field Modelwith slots and gaps A. Bross ECFA REVIEW 5 - 6 May, 2011

15. Azimuthal B fieldEffect due to slots A. Bross ECFA REVIEW 5 - 6 May, 2011

16. “Field Jumping” A. Bross ECFA REVIEW 5 - 6 May, 2011

17. Field Deviations A. Bross ECFA REVIEW 5 - 6 May, 2011

18. Magnetic Model • Understanding the details of the magnetic model is crucial • Current simulations assumed homogenous field • Figure of merit for muon charge mis-ID rate: »10-4 • Must, therefore, understand what a “realistic” field means with respect to this figure of merit • Next iteration of the simulation will address this and we must have an excellent B model available for this study • Which we are well along in developing A. Bross ECFA REVIEW 5 - 6 May, 2011

19. Photo-detector & Electronics • Silicon avalanche photodiode operating in Geiger mode • SiPM, MPPC, MRS, etc • Aggressive world-wide R&D • Readout Electronics • Front-end chip on SiPM • ASIC back-end A. Bross ECFA REVIEW 5 - 6 May, 2011

20. R&D requirements • Steel • None, mature technology. • Magnetization • Investigate STL with multiple superconductor loops within the STL cryostat • Smaller external excitation current • Photodetectors • None • On-going world-wide activities deemed sufficient for now • Scintillator • Advanced and mature technology, however: • Need to specify final shape • Impact on production & cost • Engineer detector plane mechanics • Fiber • Co-extrude with scintillator • Develop 2nd vendor with university participation A. Bross ECFA REVIEW 5 - 6 May, 2011

21. R&D requirements II • System Test • Need accurately designed and fabricated test-beam prototype detector in order to vet performance capabilities Concept for AIDA A. Bross ECFA REVIEW 5 - 6 May, 2011

22. Costing • Plan to use CERN costing model, but already have detailed template from MINOS • Steel • Cavern • Scintillator • As built costs for surface building from Nona • Plus updated fiber cost for very-large quantity A. Bross ECFA REVIEW 5 - 6 May, 2011

23. Example: MINOS Costing Model A. Bross ECFA REVIEW 5 - 6 May, 2011

24. Conclusions • Although the size (100kT) of MIND is daunting, the detector technology and engineering is mature • 5 kT prototype (MINOS) • Utilizes mature technologies with little or no required R&D • Steel • Scintillator • Extruded scintillator technology significantly advanced since the time of MINOS production A. Bross ECFA REVIEW 5 - 6 May, 2011

25. Conclusions II • Required R&D is limited and well-specified • Iteration on the superconducting transmission line design of the VLHC • Photon detector • Take wait and see approach for now • Scintillator (Optimization) • Details of extrusion shape • Study large-scale production issues • Co-extrusion of commercial fiber and bulk scintillator • Not a requirement – cost issue • System test in a test beam with suitably designed prototype is required to vet performance A. Bross ECFA REVIEW 5 - 6 May, 2011