Spectrometer Solenoid Procurement Update Steve VirostekWing Lau Mike GreenStephanie Yang Lawrence...

Spectrometer

Solenoid Procurement

Update

Steve Virostek Wing LauMike Green Stephanie

YangLawrence Berkeley National Lab Oxford Physics

MICE Collaboration Meeting June 9, 2006

Spectrometer Solenoid Procurement Update

S. Virostek, M. Green (LBNL) --- W. Lau, S. Yang (Oxford)

•Magnet specification completed and reviewed

•Change request for magnet design submitted

•Superconductor material accepted by LBNL

•Bid request package went out on April 10th

•Quotes requested from 7 vendors (3 US, 4 Europe)

•5 spectrometer solenoid bid packages received

•Bid review process is nearly complete

•Contract award expected before the end of June

Spectrometer Solenoid Update



•Spec completed, reviewed by collaboration and provided to LBNL procurement mid-March

•LBNL Purchasing reviewed and evaluated the specification and wrote the Request for Proposal

•Build-to-spec bid request package including the solenoid specification went out on April 10th

•Quotes requested from 7 qualified vendors

•Bid response requested 5 weeks from RFQ release

•5 bid packages received on May 15th (2 no bids)

Recent Progress (March – June)



•Several week evaluation period included analysis by LBNL (Eng. & Purch.) and questions for vendors

•Bid review process at LBNL is nearly complete

•Selected vendor’s bid package has been reviewed by an invited group at this collaboration meeting

•Contract award expected before the end of June

Other:

•Superconductor material arrived at LBNL May 5th

•Magnet design change request submitted May 9th

Recent Progress (continued)



•General system description•Applicable codes and standards•Detailed fabrication requirements•Inspection and acceptance requirements•Packing, shipping and handling requirements

•Notification Requirements•List of government furnished materials•Quality assurance requirements•Conceptual design drawings•Attachments (conductor spec, procedures, TRD)

Procurement Specification Content



•Material supplied by Outokumpu arrived on May 5th

•Length of the delivered conductor: 121.49 km

•Nominal dims of insulated conductor: 1.00 x 1.65 mm

•Nominal copper to superconductor ratio: 3.9 ± 0.4

•Number of filaments in the conductor matrix: ~222

•Nominal filament diameter: ~41 microns

•Nominal conductor twist pitch: 19 ± 3 mm

•Material cost for both solenoids: $168k

•Material to be shipped to vendor after contract award

Superconductor Details



Conductor Cross-section

1.00 mm

1.65 mm

41 mm Nb-Ti FilamentRRR = 70 Copper



Conductor Mechanical CharacteristicsBoth tests look for filament breakup

and defects in the filament bundle

The dimensions are acceptable



Conductor Electrical Characteristics

Specified conductor critical current: >760 @ 4.2 K and 5 T

Specified conductor n value: >35

Specified conductor copper to S/C ratio: 3.9 ± 0.4

RRR values for the conductor copper are acceptable



Typical OKAS Short Sample Test Plot



Critical Current vs. Magnetic Induction



Spooling of the Conductor



LBNL Inspection of the Superconductor•3 crates received containing six

conductor spools •All spools of conductor were visually inspected and found to be in good condition w/no shifting

•A sample was cut from one of the smaller rolls (a small roll is more likely to have defects)

•The surface of the insulation from a 1 meter long section was visually inspected. The twist pitch was observed to be ~19 mm

•The conductor copper was removed using nitric acid to allow the Nb-Ti filaments to be inspected



Exposed Conductor Filaments

The conductor twist pitch is within the specified range of values

~2.5 mm



A Closer Look at the Filaments

No filament sausaging observed, suggesting a high n valueFilament surfaces appear to be acceptablejc likely to be uniform across the conductor section



•Superconductor material accepted by LBNL

•RFQ’s sent to 7 magnet vendors

•5 bid packages received by LBNL May 15th

•Final vendor selection nearly complete

•Procurement contract expected to be placed before the end of June

Summary

Spectrometer Solenoid Procurement Update Steve VirostekWing Lau Mike GreenStephanie Yang Lawrence...

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