Andrew Hime with Fraser Duncan & David Sinclair DUSEL Lecture Series Berkeley, CA May 20, 2005

1. Andrew Hime with Fraser Duncan & David Sinclair DUSEL Lecture Series Berkeley, CA May 20, 2005

2. Status SNOLAB Development Deep Physics SNOLAB-DUSEL Relationship

4. Relative Attenuation of Muons & Muon-Induced Activity Dongming Mei & AH Gran Sasso Soudan WIPP SNOLAB

5. SNO CC NC High-purity water & detector construction materials … NC background equivalent to < 1 neutron / 1 kt / day ~ 0.4 neutrons / tonne / year!

6. SNOLAB – An International Facility for Underground Science  Expand underground space to allow several experiments to operate simultaneously …  Provide a surface building to support the underground expt,s …  Experiments selected on the basis of scientific merit, technical feasibility, and appropriateness for SNOLAB 2001 - CFI Solicitation for Facilties Proposals 2002 - SNOLAB Proposal Accepted 2003 - CFI + Provincial Funding Released (~ $50M)

7. Workshops August 20, 2002 (Sudbury) Science & Information Gathering II. November 21-22, 2002 (Ottawa) Prospective Experiments & Infrastructure Needs III. May 12-14, 2004 (Sudbury) Refine Infrastructure Needs & Kick-Off Experiment Evaluation Process IV. Planning for August 15-18, 2005 Establish Initial Suite of Experiments & Scientific Road-Map  Call for LOI’s Jan.26, 2004

8. … Experimental Interest & Response since Jan.26, 2004 Call for LOI’s …

9. Experiment Advisory Committee LOI Evaluation Scientific Merit Infrastructure Needs Progress on R&D Technical Feasibility Safety Funding & Schedule Participation & Management Chair – B. Barish Secretary - A. Hime Members • B. Balantenkin (US) • C. Burgess (CND) • T. Kajita (Japan) • J. Martin (CND) • K. Ragan (CND) • K. Scholberg (US) • D. Wark (UK) First phase of the evaluation process is now complete … proceeding to define an initial suite of experiments & scientific roadmap for SNOLAB

10. Solar + KamLAND Vacuum ~ 8 x 10-5 eV2 Matter 1 SNO+  SNO   CLEAN

11. Atmospheric ~ 2 x 10-3 eV2 Hierarchy? Absolute Mass Scale?

12. Additional CP Phases for Majorana Neutrinos  Chooz et al ~ 3 x 10-3 eV2__ 10-3 0 0.05 0.1 sin213 Values of 13 & CP? CP Violation in Neutrino Sector? Leptogenesis & Matter-Antimatter Asymmetry in the Universe? Are Neutrinos their own Antiparticles?

13. e- ne Z Z+1 ne e- Z+2 e- ne Z e- Z+1 Z+2 bb Decay Requires Massive Majorana Neutrino L=2 Endpoint Energy

14. Our Dreams Next Generation We Are Here Allowed Phase Space for a Majorana Neutrino Mass 76Ge ~ 1025 yrs Majorana GerDA EXO COBRA ~ 1026 yrs ~ 1027 yrs ~ 1028 yrs ~ 1029 yrs

15. mD ~ 200 GeV m ~ 0.01 - 0.1 eV Seesaw Mechanism MR ~ 1015 GeV ! Majorana Neutrino Mass & GUT Scale

18. Dark Matter Results & Dreams } Where we Are X > 1000 } Our Dreams SuperCDMS ZEPLIN-IV XENON CLEAN DEAP DRIFT-III

19. Dark Matter Sensitivity versus Depth Dongming Mei & AH

20. Double Beta Decay versus Depth Dongming Mei & AH

21. Sensitivity to (,n) Dongming Mei & AH

22. Office Space Meeting Rooms & Auditorium Computing Facilities Regular & High Bay Laboratories Clean Assembly & Transport Occupancy expected in July, 2005

25. Laboratory Space

26. Laboratory Space

27. Excavation Progress

28. Chiller Drift Excavation Progress

29. Crusher Station Excavation Progress

30. Junction of Top Access Drift and Bottom Access Ramp Excavation Progress

31. Bottom Access Ramp Excavation Progress

32. Junction of Ladder Access Drift and Top Access Cryopit Excavation Progress

33. Cube Hall

34. Cube Hall 5T Monorail 20T Hitches in Back Removable Top Deck Future Mid Level Platform Fire Escape Stair Well

35. Cube Hall

36. Cube Hall

37. Cube Hall

38. Cube Hall

39. Cube Hall

40. Ladder Labs

41. Ladder Labs

42. Ladder Labs

43. Ladder Labs

44. Cryopit

45. Cryopit

46. SNO Cavern

47. Potential Experimental Layouts

48. Summary • The facility design provides 34,000 sq ft of class 2000 clean room space. • Phase I will have sufficient space for 2 large experiments (Cube Hall, SNO Cavern) and 2-3 small/medium scale experiments (Ladder Labs). • Phase II will provide space for an additional large scale experiment (Cryopit). • Personnel facilities double the proven SNO design and provide room for 50 nominal occupancy. • Cooling capacity is expected to be ample for the first generation of experiments. • Power appears to be sufficient for Day 1 but will need upgrading.

49. SNOLAB and the DUSEL Process

50. Some Simple Facts • SNOLAB is presently under construction and a scientific program is under development with focus upon particle astrophysics experiments requiring a deep site (neutrinoless double beta decay, low-energy solar neutrinos, and cosmological dark matter). • An enthusiastic response to a call for LOI’s with significant (~50%) initiative and leadership from US. • SNOLAB will provide a premier deep underground laboratory during the next decade which is critical to maintain the field of underground science while establishing DUSEL.