mu2e wgm 11/16/2011 r. ray mu2e project manager. review of the past few months in september it...

Mu2e WGM

11/16/2011

R. Ray

Mu2e Project manager

R. Ray - Mu2e WGM 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

Recycler Injection Kicker – Provided by NOvA

Extraction kicker required by Mu2e and g-2 – Significantly cheaper due to relaxed requirements associated with fewer Booster Batches.

New 2.5 MHz RF system using recycled MI RF. Required by Mu2e and g-2.

New Debuncher Injection Kicker required by Mu2e and g-2.

Mu2e resonant extraction System/ g-2 Extraction Kicker

External Beamline to Muon Campus

Abort Kicker – Required for Mu2e. Power supply shared with g-2 Extraction Kicker.

R. Ray - Mu2e WGM 5

Muon Campus

Mu2e

g-2

R. Ray - Mu2e WGM 6

Feedboxes

Distribution Lines

TS4-5Cryostat

TS3 Cryostat

TS1-2 Cryostat

DS Cryostat

PS cryostat~60/40 of Base Cost Solenoids/Infrastructure

Solenoids

• Power Supply/Quench Protection• Cryoplant

• Field Mapping• Ancillary Equipment• Installation and commissioning

• Production Solenoid (PS)• Transport Solenoid (TS)• Detector Solenoid (DS)• Cryogenic Distribution• Insulating Vacuum

PS IRON

DS IRON

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 Constructiono Not as deep, smaller footprint.

Muon beamlineo 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

Over $10M threshold. Have to understand costs better but may have to package this into two AIPs

Still a work in progress!


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.


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.


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


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


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


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


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.


Schedule to CD-1


Overall Schedule