MINOS Far Detector Installation & Commissioning

1. MINOS Far Detector Installation & Commissioning Jeff Nelson MNHEP DoE Visit September, 2002

2. Outline • Plane assembly • Status & experience • Projection methodology • Projected schedule • Issues & costs • Safety • Detector operation • Live time & data collected

3. The detector in August…

4. Assembly & Commissioning • SM1 Completed in July • Met commissioning milestone on July 26th • 354 of 484 planes installed • 73% completed, 3.9 kton • 348 planes commissioned • All commissioned planes are collecting calibration & cosmic ray data

5. Installation Schedule • We have averaged 6.2 planes per week since installation reached full efficiency in Nov. 01 • Currently 4 days behind working schedule • Amall drop off in rate associated with a few factors including • Workers now have vacation time • Some attrition in staffing • Plots shows • Current FNAL working schedule • Actual installation schedule • Projected completion schedule • Differences described in following slides

6. Installation Extrapolation Data • History of MINOS installation hours & plane installation in 2 week periods • Some drop in hours work due to crew having accumulated vacation in their first year of employment • About a 10% effect • Fit shows what a worker accounts for roughly 0.25 planes/week • No drop off in efficiency for reasonable staffing levels • Some expected a levels below 14 FTE

7. Staff & Future Projections • Job Market in northern Minnesota • Down turn in iron mining in early 2001 • We were able to hire some very experienced millwrights & operators for the installation crew • Steel mills are hiring again • We have lost one staff per month each of the last 4 months • We are starting to replace these workers to maintain the current efficiency • The projections show what happened if we replace one of the current losses & all further losses • This is our current plan • Adding new crew has safety, quality & efficiency implications during training period • Particularly an issue for materials handling • Costs are about $1k per new employee • We do not take this lightly

8. Costs & Schedule Implications • The amount of work is the same and there are no changes in efficiency • There are no significant costs for WBS 2.4 associated with install schedule adjustments • The only cost implications are to on-project operations costs • 2nd shift charges for DNR hoistman and on-call electricians • Physicist shift leader travel • Staffing for receiving at surface building • All 3 amounts to $5k per week of slip • Now projecting a 6 week change in completion date

9. Safety at Soudan • Major activities • Continued monthly & annual outside inspections of equipment and facilities • Materials handling procedure review • Field mapping, signage, & training • Monthly joint safety meetings continued throughout the period • Back safety • Annual fire safety refresher • Annual operators certification • Cryogenic safety • Site safety update • Rescue team exercises

10. Safety at Soudan • We have had 4 safety reports at Soudan since the last review • 1 lost days incident • Most serious was a herniated disk while moving steel plates at the assembly workstation • 5 safety reports • 3 near misses • 2 no list time accident • Incident rates for project • A reportable incidence rate of 3.1 @ (per 200,000 hours worked, for crew + physicist) • A lost time incidence rate of 2.5 @ • A lost days incidence rate of 0.5 @

11. Detector operations • Since the summer we have been collecting data for calibration and cosmic rays • We have also been working to increase the live time • Addressing potential hardware impediments • HV monitoring improved and hardware swaps • Optimizing automatic recovery hardware/software • Have made good progress since early spring in increasing live time

12. Slides in Hand

13. Physicists & Installation Monthly averages • A total of 900 physicist weeks or 18 physicist years at Soudan on installation tasks • No safety incidents involving physicists at Soudan! Today

14. Laboratory Staff Organization