-1-Wang, Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

WANG, LiWANG, Li

2009-01-152009-01-15

Institute of Cryogenics and Superconductivity TechnologyInstitute of Cryogenics and Superconductivity Technology

Harbin Institute of Technology, China Harbin Institute of Technology, China

MICE/Muool Coupling MagnetsMICE/Muool Coupling Magnets ProgressProgress

-2-Wang,Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

Contents

• Large Coil Test and Plan To be presented by Dr. FengYu Xu

• Fabrication Plan of MICE/MuCool Coupling Magnets

Visits to possible collaborators in China; Request for quotations; and further

technical discussions, preparation for public bidding procedure etc.

• MICE/MuCool Coupling Magnet Updated Design Review Done in ICST/HIT on Dec.06 to Dec.08, 2008, and further improvement has

been carried out after the review according to the Close Out from the review

panel (to be presented by Hong Wu/Heng Pan/XingLong Guo).

-3-Wang,Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

MICE/MuCool Coupling Magnet Updated Design

The updated engineering design were carried out according to the “A Technical

Agreement on the MICE and MuCool Coupling Solenoid Magnet Fabrication,

Assembly, Test and Shipping” issued in September, 2007 and experience learnt form

test coils’ winding in collaboration with Lawrence Berkeley National Laboratory. The

main differences between the previous design reviewed in May, 2007 and the

updated design reviewed in Dec., 2008 mainly include:

• The inner radius of the coupling coil is changed from 744mm to 750mm considering

very tight space on the inner side of the magnet.

• The coil assembly is designed different from the previous one in terms of winding,

mandrel fabrication, cooling and quench protection assembly.

• A double-band cold mass support system is presented instead of a single-band

system considering the shipping load during long-term transportation and space

limitation.

-4-Wang,Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

• Two drop-in PTR coolers are to be used for cooling the coupling magnet for the

sake of easy removal from the cryostat during transportation.

• Thermal shields are designed to be supported from the vacuum vessel by four

pairs of G-10 rods instead of being supported onto the cold mass support

assembly as previous design.

• The cooling configuration for the warm end of the HTS leads is designed different

from the previous one.

Further improvement after the review

• To validate:

Stress analyses on final coil cold mass design, mechanical (loads, stress) and thermal analyses on the current design for the coil cold mass support assembly, stress and deflection analyses on the vacuum chamber, etc.

• To update the following engineering design drawings:

Vacuum chamber and interface, coil cold mass assembly, cold mass support assembly, etc.

-5-Wang,Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

Cryocoolers

Power leads

Cold mass supports

Coil assembly

He cooling pipes

Thermal shields and intercepts

Vacuum vessel

He condenser

Previous design

-6-Wang,Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

Cryocoolers Power leads

Cold mass supports

Coil assembly

He cooling pipes

Thermal shields and intercepts

Vacuum vessel

He condenser

Updated design

-7-Wang,Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

Coil assembly and its cooling

Updated designPrevious design

Piping: round tubing instead of type tubing; more cold surface to mount QPAssembly; more space for mounting CMSupport cold end base, etc.

-8-Wang,Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

Updated designPrevious design

Cold mass support system

Single-band to double-band; space for cold end base and its strength

-9-Wang,Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

Large Coil Test and Plan

SC splices strength test at LHe temperature

• The strength of SC splices soldering by Sn-Ag solder under LHe

temperature is a major concern presently considering the rigorous stress

state in the coupling coil because all the splices are wound inside the coil

and should be tested before winding the MuCool coil according to Dr. Mike

Green’s advice.

• ICST has performed the strength test for the SC splices at LN2 temperature

and the results show its strength is close to that of the SC wire itself .

• ICST has prepared some of SC splices and to see if they could be tested in

LBNL under LHe temperature.

-10-Wang,Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

Large test coil

Winding of prototype coil

Cryostat for prototype coil

Cryo-test system

Welding

-11-Wang,Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

Fabrication Plan of MICE/MuCool Coupling Magnets

Visits to possible vendors in China last December

• CSRDA in Beijing

Experience in: fabrication and assembly of coil mandrel & cooling tubing welding,

heat shields & vacuum chamber for SSM and Ion-removal SC solenoid in BEPCII,

fabrication, assembly, and maintenance of several MRI magnet systems since 1987

(winding coil, cold mass, cryostat, etc.).

• SINAP in Shanghai

Experience in: fabrication, assembly and test of a small SC magnet (EBIT, solenoid

coil ID 100mm) for Shanghai FuDan University, various advanced equipment or

device for alignment, measurement and cryo-test, a set of 600W/4.5K refrigerator

system etc.

Request for quotation• Cold mass assembly: by Jan. 17

• Cryostat assembly: by the middle of February

-12-Wang,Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

Possibilities to cause delays• Manpower: skilled technicians and their supervisor, experienced mechanical engineers, etc.

• Funds: available time?

• Request for quotation

Further technical discussions with possible vendors before public bidding for Cryostat

Assembly (after Chinese Spring Festival till Feb. 1st ) are needed.

• Public bidding procedure

At least 3 vendors and 7 days’ workday for publicity, otherwise invalid bidding; if sole source, it

will take a longer time, more paper work and complicated procedure.

• Contract award and sign it after bidding

At least one to two weeks are needed.

• Winter holidays in HIT: Jan. 19 to Feb. 22

No possibility for processing bidding in HIT

Hopefully, to contract the first MuCool coil assembly fabrication out before or

right after the Chinese Spring Festival (at latest by the middle of this February) in

order to avoid more delay!

Plan for Fabrication the MuCool magnet

-13-Wang, Li

The 23rd MICE Collaboration Meeting

2009-01-13 to 17 HIT/CHINA

Click to edit company slogan .

Icst.hit.edu.cn