Mu2e WGM

1. Mu2e WGM 11/16/2011 R. Ray Mu2e Project manager

2. Review of the past few months • In September it became apparent that the cost of Mu2e was well in excess of what was considered acceptable. • The accelerator costs were up significantly, but other subsystems were also up. • The Lab appointed a task force to figure out how to deliver protons for significantly less money. • E. Prebys, I. Kourbanis, J. Morgan, V. Nagaslaev, V. Shiltsev, S. Werkema, C. Ankenbrandt • The task force was wildly successful • We have been de-scoping and simplifying other systems to further reduce the cost. • We have worked with g-2 to identify common elements to package as AIPs and GPPs R. Ray - Mu2e WGM

3. New Project Scope • Original scheme delivered 25 kW proton beam (6 Booster batches) to the Mu2e detector from the Booster using the Recycler Ring, Accumulator Ring and the Debuncher Ring. • In the new scheme, a single booster batch is injected into the Recycler, where it is divided into four 2.5 MHz bunches. These are transferred one at a time to the Debuncher, where they are captured and slow extracted. • Nearly identical to g-2 requirements in Muon Campus location. • We resonantly extract from the Debuncher while g-2 uses a simple kicker. • Bypassing the Accumulator eliminates kickers and 2 RF systems and allows us to us to reuse Accumulator components for the external beamline. • This scheme can deliver 1 or 2 Booster Batches per Supercycle (1/6 or 1/3 the original beam power) for essentially the same cost. The cost of shielding is likely higher for 2 Booster Batches however. R. Ray - Mu2e WGM

4. Accelerator Components New 2.5 MHz RF system using recycled MI RF. Required by Mu2e and g-2. Extraction kicker required by Mu2e and g-2 – Significantly cheaper due to relaxed requirements associated with fewer Booster Batches. Recycler Injection Kicker – Provided by NOvA Abort Kicker – Required for Mu2e. Power supply shared with g-2 Extraction Kicker. New Debuncher Injection Kicker required by Mu2e and g-2. Mu2e resonant extraction System/ g-2 Extraction Kicker External Beamline to Muon Campus R. Ray - Mu2e WGM

5. Muon Campus Mu2e g-2 R. Ray - Mu2e WGM

6. Solenoids ~60/40 of Base Cost Solenoids/Infrastructure • Production Solenoid (PS) • Transport Solenoid (TS) • Detector Solenoid (DS) • Cryogenic Distribution • Insulating Vacuum PS IRON DS IRON • Power Supply/Quench Protection • Cryoplant • Field Mapping • Ancillary Equipment • Installation and commissioning R. Ray - Mu2e WGM

7. Solenoid Cost Savings • We have identified significant cost savings in the solenoid system • Eliminate some R&D • Eliminate PS and TS iron yokes • Move cryo off-Project • Reduce PS field from 5T to 4.4T (reduces stopped muon yield by ~10%) • Simplify DS design (single layer coil, modular design) • Simplify TS design (5 cryostats  2) • Not all savings realized yet. Still some work to do. • Have to redo some background estimates that could be impacted by relaxing some solenoid field specs. R. Ray - Mu2e WGM

8. Other Subsystems • Significant savings have also been realized in other systems • DAQ (application of free scientific effort, where appropriate and scaling down system capability to account for less beam power) • Conventional Construction • Not as deep, smaller footprint. • Muon beamline • Get rid of doped plastic neutron absorber lining inside of DS. R. Ray - Mu2e WGM

9. Status of Mu2e Cost R. Ray - Mu2e WGM

10. Needed for Mu2e and g-2 Still a work in progress! Over $10M threshold. Have to understand costs better but may have to package this into two AIPs R. Ray - Mu2e WGM

11. AIPs and GPPs • These are supposed to be self-contained, so they include design, fabrication, installation, QA/QC and Project Management costs. • Impacts timing. Have to get some money in time to do design work. • Don’t know if same rules for costing scientists apply here. • Conceptual Design work largely done and already paid for by the Mu2e Project. Assume it has to stay there. R. Ray - Mu2e WGM

12. Timing • Common elements are all used by g-2. • g-2 schedule is not compatible with Mu2e CD process, so most of these items could not be funded on the Mu2e Project in any case, without delaying g-2. R. Ray - Mu2e WGM

13. Approximate Cost of the Muon Program • Mu2e $213M • g-2 MIE $22M • AIP1 $11.2M • AIP2 $9M • Muon Campus Beamline Enclosure (GPP) $9M • Muon Campus Cryo Facility (GPP) $9M • g-2 ring disassembly and move $6.6M • g-2 Building (GPP) $7.4M Total $287M R. Ray - Mu2e WGM

14. Other Activities • Doug Led an effort to review our Requirements Documents • Separate needs from wants • Re-evaluate for lower beam power. • Doug organized an effort to scrub the BOEs. • Effort ongoing. • Unlikely to find significant cost savings but will improve the quality of the estimate R. Ray - Mu2e WGM

15. Moving Forward • We have been told that this plan is acceptable, so we are working to get back on track for a CD-1 Review as soon as we can be ready. • Complete work on modified scope • New background and sensitivity estimates based on new configuration and beam power. • Update CDR • Update WBS, BOEs, cost & schedule. • Director’s Review • Lehman Review R. Ray - Mu2e WGM

16. CDR • Biggest change is in the Accelerator and Solenoid Chapters • Have to capture scope change and determine format for describing AIPs/GPPs. • Smaller modifications required for other chapters. • Summary chapters • Background and sensitivity chapter • DAQ • Conventional Construction • Muon Beamline R. Ray - Mu2e WGM

17. Director’s Review • Shooting for 2d half of March • All material ready beginning of March. • Primarily Cost, Schedule and Management review. • Technical component to Accelerator and Solenoid sessions because of significant changes. R. Ray - Mu2e WGM

18. Schedule to CD-1 R. Ray - Mu2e WGM

19. Overall Schedule R. Ray - Mu2e WGM