Takeyasu Ito University of Tennessee/Oak Ridge National Laboratory EDM Cost and Schedule Review February, 2005 Beam Splitter / State Selector, Polarizing Magnet, and Spin Flipper WBS 1.2.1, 1.2.2, 1.2.3: Splitter/State Selector Main Body WBS 1.2.4, 1.2.5, 1.2.6: Polarizing Magnet WBS 1.3.1, 1.3.2, 1.3.3: Spin Flipper

Takeyasu Ito2 SNS FNBP UCN Beamline and EDM Experiment Layout

Takeyasu Ito3 Purpose, Functions and Design Goals Split the beam into two, to feed the two measurement cells Polarize neutrons Flip the polarization of each beam independently Maximize the beam delivered to the measurement cells

Takeyasu Ito4 Principle of Polarizer/Splitter with Polarizing Supermirror Polarizing supermirror: One spin state: reflected up to the critical angle  c psm The other spin state: transmitted at all angles If the input guide has m=1.5, and PSM has m=2.4, then  = 14mrad. Need 10 m for 15cm wide guide In order for one spin state to be 100% reflected,

Takeyasu Ito5 One Possible Layout 12 cm wide, m=3.5 straight guide (buried under shielding) Diverging horn (7 m) 30 cm wide, m=1.5 straight guide ( 2m) Polarizer/Splitter (14 m) m=2.4 polarizing supermirror coated on thin Si wafer Rudimentary (2-dimentional) Monte Carlo study indicated 30% transmission and 90% polarization.

Takeyasu Ito6 Cost Estimate - Overview (WBS 1.2) Design –$63,200 + $27,176 Procurement –$953,940+ $410,194 Installation –$12,640 + $5,435 Total + Contingency= $1,029,780 +$442,805 Note: The diverging horn is not included in the budget although it is not included in the FNPB baseline. If this is proven to be beneficial for other experiments at the FNPB UCN line, we expect some kind of cost sharing between FNPB and EDM.

Takeyasu Ito7 Cost Estimate - Design (WBS 1.2.1) Conceptual design/Monte Carlo simulation –Physicist x 100hrs = $0 Shop drawings –Engineer x 200hrs = $31,600 Preparation of equipment spec –Engineer x 200hrs = $31,600 Total + Contingency = $63,200 + $27,176

Takeyasu Ito8 Cost Estimate - Procurement (WBS1.2.2) Preparation for procurement –Physicist x 30hrs = $0 –Engineer x 30hrs = $4,740 Splitter/State Selector –Engineering Design + Fabrication = $949,200 (=$840,000+13% overhead) Total + Contingency = $953,940+ $410,194

Takeyasu Ito9 Splitter/State Selector System Basis for estimate –Supermirror guides $30k/m for m=3.5 * Note: price of coating goes as m 4 –Si wafer $30 / 4-inch disk * From semiconductor industry, roughness ~ 5Å (source J.J.Ferme from Seso) Cost estimate –$30k/m x 14m x 2 = $840 k * Factor 2 for coating Si wafer and constructing more complicated system than straight guide

Takeyasu Ito10 Example: SNS FNPB UCN Beamline Guides = $25.1K/m Vacuum housing=$3.84K/m Support and Adjustment fixtures=$790/m * Based on quote from Swiss Neutronics on FNPB UCN beamline with the following parameters: –The guide size is 100mm x 120mm –The guide will have m=3.5 all sides –The guide is straight –The guide has a total length of 30m

Takeyasu Ito11 Cost Estimate - Installation (WBS1.2.3) Installation –Technician x 80hrs = $12,640 Oversight –Physicist x 40hrs = $0 Total + contingency = $12,640 + $5,435

Takeyasu Ito12

Takeyasu Ito13 Cost Estimate - Contingency for WBS Technical –Risk factor=10% –Risk weight=2 Cost –Risk factor=15% –Risk weight=1 Schedule –Risk factor=8 Total percentage contingency = 43%

Takeyasu Ito14 Estimate for Duration Design: 88 days + 43% float –Conceptual design: 100 hours –Shop Drawing: 200 hours –Preparation of equipment spec: 200hours Procurement: 1 year + 43% float Installation: 14 days + 43% float

Takeyasu Ito15 Cost and Schedule Estimate for Polarizing Magnet (WBS ) Design –Design work by physicists –$0 –255 days Procure –$158,200+ $68,026 –183 days Install –$12,640 + $5,435 –21 days

Takeyasu Ito16 Cost and Schedule Estimate for Spin Flipper (WBS ) Design –Design work by physicists –$0 –21 days Procure –Flippers: $40,000 –Power supplies, etc: $36,000 –Total: $85,880 + $36,928 –183 days Install –$6,320 + $2,718 –14 days

Takeyasu Ito17 Summary Splitter/State selector (WBS 1.2) $1,200,620 +$516, days Spin Flippers (WBS 1.3) $92,220 + $39, days