spectrometer solenoid design and procurement review steve virostek mike green mike zisman lawrence...

Spectrometer Solenoid

Design and Procurement

Review

Steve VirostekMike Green

Mike ZismanLawrence Berkeley National Lab

MICE Collaboration Meeting October 10, 2006

Spectrometer Solenoid Design & Procurement

S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab

•Design review held by Wang NMR on Sept 6, 2006-Attendees: S. Virostek, M. Zisman, M. Green, D. Li-Complete design package book provided by Wang-Issues and actions items identified during review-Follow up document from Wang addresses issues

•Detailed magnet design is now complete

•Superconducting wire sent from LBNL to Wang

•Coil formers and high TC leads ordered by Wang

•First magnet scheduled to be shipped end Aug 07

Spectrometer Solenoid Update



He Filler Neck

Lead Neck

Cold Mass Support

PMT Iron Shield

Space for Radiation Shield Support Stand

Cooler Neck



Lead Neck

Gas Pipe

4.2 K Coolers

Condenser Tank

Liquid Pipe

Cold Mass

4K End

60K Intercept

300K End



Magnet Coil Parameters

Parameter Match 1 Match 2 End 1 Center End 2Coil length (mm) 201.2 199.5 110.6 1314.3 110.6Coil inner radius (mm) 258 258 258 258 258Coil thickness (mm) 44.7 29.8 59.6 21.3 66.0Number of layers 42 28 56 20 62Number of turns per layer 120 119 66 784 66Coil overall current density (A mm Š2) 142.19 152.62 127.37 152.44 135.18Coil current I (A) 253.7 272.1 227.2 272.2 241.1Coil self inductance (H) 12.8 5.4 9.5* 41.4* 11.1*Coil Stored Energy at I (MJ) 0.41 0.20 0.25 1.53 0.32

Uniform Field Magnets

* The uniform field magnet coils in series have a self inductance of 77 H

Separately Powered

Coil package length = 2530 mm

-



Magnet Coil Load Lines

10864200

100

200

300

400

500T = 3.4 KT = 4.2 KT = 5.0 KTracker M1Tracker M2Tracker E1Tracker CTracker E2

Magnet Peak B and Conductor B (T)

Mag

net

an

d C

ond

uct

or C

urr

ent

(A)



•Indirect cooling using liquid helium condensers

•Baseline design will use two cryocoolers but will allow mounting of a third cooler, if necessary

•Cryocoolers and high TC leads will be accessible by means of removable cover plates

•60K (or less) thermal shield is conductively cooled using the first stage of the cryocoolers

•Thermal shield nitrogen reservoir will protect the high TC leads and provide extra cooling margin

Design Overview (coil cooling)



•Single piece 6061-T6 aluminum coil former

•Each layer wet wound using Stycast 2850 FT

•2.5 mil thick fiberglass between winding layers

•Aluminum coil banding will provide hoop force support and ensure coils are tight after cooldown

•Conductor joints are to be lapped by at least 24” to minimize the I2R losses

•Passive quench protection will be provided by a system of diodes & resistors

Design Overview (coil construction)



•Helium vessel (Al) and vacuum vessel (304SS) to be designed & tested according to PV code

•He vessel will contain two relief paths for safety

•Unidirectional S-2 fiberglass cold mass supports using race-track shaped links (safety factor of 4)

•304 SS support design derived from LBNL/Oxford

•Cold mass support design allows cold shipping

•TBD: lifting accommodations and base mounting

Design Overview (PV’s & supports)



•Two cryocoolers are needed at Wang NMR by the end of Feb 2007 for installation into first magnet

•Two additional coolers needed one month later

•13 week lead time after placement of order

•Two coolers per magnet anticipated for operation

•Magnets designed to mount up to three coolers

•Two more coolers to be procured at a later date

•Short procurement spec to be done by M. Green

Cryocooler Procurement



•First draft of power supply procurement spec is being reviewed by collaboration members

•Three 300 A and two 50 A supplies are needed for magnet operation and for testing @ FNAL

•One spare of each supply allows parallel testing of first (@FNAL) & second (@Wang) magnets

•Lead time to procure power supplies is 3 months

•First supply needed May 07 for testing at Wang

Power Supply Procurement



•On-axis field profile and peak field on conductor

•Axial forces and axial magnetic pressure calcs

•Evaluation of fringe fields on leads & cryocoolers

•3-D magnet quench analyses (w/o Al bore tube)

•Heat leak calculations (thermal shield, He vessel)

•Calculation of cooldown cryogen requirements

•FEA stress analysis of coils and coil former

•ASME code calculations for He & vacuum vessels

Summary of Wang Analyses



•Magnet Construction Quality Assurance Plan

•Fabrication/installation/inspection plans:-coil former, ground insulation, coil winding, coil banding-quench protection, conductor feed thrus, coil assembly

-He vessel, cold mass support, He recondenser, Hi-TC leads-thermal shield, vacuum vessel, support structure

•Winding instructions for each coil

•Project work breakdown structure and schedule

•Detailed component and assembly drawings

Other Project Documents



Schedule Summary

Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

Place Magnet Order with Wang NMR (LBNL)

Complete Magnet System Design

Write QC/QA Administration & Test Report

Procure & Deliver Superconductor to Wang (LBNL)

Conduct Magnet Design Review

Procure Coil Formers from Subcontractor

Write Spec and Procure High Tc Leads

Write Spec and Procure Cryocoolers (LBNL)

Write Spec and Procure Power Supplies (LBNL)

Wind Coils on Coil Formers

Assemble and Leak Check He Shell

Install Superinsulation and Cold Mass Supports

Install Hi-Tc Leads, Recondensers & Cryocoolers

Leak Checks, Cooldown & Acceptance Tests

Ship Magnets

Task Description2006 2007



•Detailed magnet design is now complete

•Coil formers and high TC leads ordered

•Superconducting wire delivered to Wang

•Cryocooler order to be placed soon (~1 mo)

•Power supply spec is nearly complete

•First magnet to be shipped by end Aug 07

•Second magnet to follow 1 month later

Summary

spectrometer solenoid design and procurement review steve virostek mike green mike zisman lawrence...

Documents

magnet design

end slide

cooler neck slide

wang coil formers

t6 aluminum coil

fiberglass cold mass

wang issues

radiation shield support