Status and Integration of the Spectrometer Solenoid Magnets

1. Status and Integration of the Spectrometer Solenoid Magnets Steve Virostek Lawrence Berkeley National Lab MICE CM18 @ RAL June 15, 2007

2. MICE Cooling Channel Layout Spectrometer Solenoid 1 Spectrometer Solenoid 2 Steve Virostek - - - Lawrence Berkeley National Laboratory

3. Spectrometer Solenoid Fabrication Update • 1st magnet coil winding to be done end of June • Second coil former ready for winding upon completion of first magnet coils • Winding of fiberglass cold mass support bands complete – associated hardware nearly complete • Four cryocoolers now on hand at Wang NMR • HTC leads and magnet instrumentation on hand • Power supplies being ordered this week (UCR) • P.O. placed with Wang for cryocooler testing Steve Virostek - - - Lawrence Berkeley National Laboratory

4. Spectrometer Solenoid Cold Mass Passive Quench Protection Space Coil Cover End Coil 1 Complete 690 mm Match Coil 1 Done this week 2544 mm End Coil 2 490 mm Start next week Center Coil LHe Space Complete Match Coil 2 Complete Coil Spacer Steve Virostek - - - Lawrence Berkeley National Laboratory

5. Cold Mass with 50 Ton Support System 300 K Support End Cold Mass Covers 60 K Support Intercept On order Support Links Near complete Support Bands Complete 4 K Support End Steve Virostek - - - Lawrence Berkeley National Laboratory

6. Magnet #1 Coil Winding Progress Winding of Match 1 coil Completed Match 2 coil Steve Virostek - - - Lawrence Berkeley National Laboratory

7. Magnet #1 Coil Winding Progress Steve Virostek - - - Lawrence Berkeley National Laboratory

8. Cold Mass Support Fiberglass Bands • All 32 pairs of fiberglass cold mass support bands have been machine wound, oven cured and cut to the finished width Steve Virostek - - - Lawrence Berkeley National Laboratory

9. Cold Mass Support Assembly • Cold mass support band links, pins and bushings are being fabricated and are close to completion • Design load proof testing of the 16 cold mass support assemblies will take place early next month Steve Virostek - - - Lawrence Berkeley National Laboratory

10. Other Related Hardware Material for cold mass supp’t vacuum vessel extensions 2nd magnet coil winding form leak checked & ready to wind Steve Virostek - - - Lawrence Berkeley National Laboratory

11. Updated Schedule Summary Steve Virostek - - - Lawrence Berkeley National Laboratory

12. Cryocooler Performance Measurement • Purpose: • Measure PT-415 cooler performance from 2.5 K to 22 K • Confirm drop-in mode operation and measure heat leak • Demonstrate that the PT-415 cooler will liquefy helium • Check the convection currents’ role in intercepting heat • Plan: • Measure stage temps vs heat load (in vacuum & He gas) • Assess the thermal resistance of the 1st stage taper joint • Operate the system with the helium at 3.8, 4.2 & 4.6 K • Measure the liquefaction of helium at 4.3 K Steve Virostek - - - Lawrence Berkeley National Laboratory

13. Cryocooler Experiment Schematic Rotary Valve Cooler Ballast Tank Safety Relief Tube Valve Motor Gas Fill Tube Liquid Level Gauge Tube P T Cooler Top Plate Cryostat Top Plate Drop-in Seal Radiation Shield T Pulse Tube Wall t = ~0.38 mm Cooler Enclosure Tube T T Cooler Ist Stage w/ Taper Q Regenerator Tube Q 40 - 60 K Shield T He Gas Vacuum Vessel Condenser (A = 0.042 m2) Q T Liquefaction Tank ID = ~125 mm Length ~150 mm Wall t = ~1 mm Q End t = ~6.4 mm T Volume = ~1.8 liters T

14. Integration and Installation Topics • Design of module base connection to rails and module lifting features added to drawings and submitted to Wang • Transfer thru MICE hall door verified • Flange sealing concept/design integrated • Utility requirements for operation • Iron shield final design & fab plan ongoing Steve Virostek - - - Lawrence Berkeley National Laboratory

15. Module Mounting Provision Six mounting plates added to the support stand base for installation on rails Steve Virostek - - - Lawrence Berkeley National Laboratory

16. Module Lifting Provision Four cutouts added to the support stand side walls for lifting straps Open issue: will a lifting fixture be required? Steve Virostek - - - Lawrence Berkeley National Laboratory

17. Spectrometer Solenoid-AFC Module Joint Spectrometer solenoid flange AFC flange 36 bolts on a 1470 mm dia 56 mm Metal seal groove O-ring groove 1372 mm ID bellows Steve Virostek - - - Lawrence Berkeley National Laboratory

18. Magnet Utility Requirements • Cryomech Model PT-415 cryocoolers (4 or 6 each total) • 50 Hz AC: 10.5 kW @ 200/220 or 380/420 V, 3 phase • Cooling: minimum 3 gpm of water @ 80ºF max • 300 A Power Supplies – American Magnetics (3 ea total) • 50-60 Hz AC: 3.5 kW @ 208 V, 3, forced air cooled, rack mnt. • 60 A Power Supplies – Lake Shore Cryotronics (4 ea tot.) • 50-60 Hz AC: 0.3 kW @ 208 V, 3, forced air cooled, rack mnt. • Vacuum: 10-3 torr @ startup thru a 25 mm flanged port • Liquid cryogens: 600 liters LN2, 1000 liters LHe (x2) • Instrumentation monitoring requirements • Various voltages, temperature, He level, heaters, pressure, vac. Steve Virostek - - - Lawrence Berkeley National Laboratory

19. Cryocooler Compressor • Dimensions: • 61x58x97 (LxWxH, cm) • On ~7 cm  wheels • Weight: • 223 kg • He flex line length: • 20 meters • Lifting eyes: • 4 ea on top (one/corner) Steve Virostek - - - Lawrence Berkeley National Laboratory

20. Spectrometer Solenoid Iron Shields • Overall iron shield dimensions have now been established • Final design and fabrication drawings to be completed soon • Design will be integrated with requirements of TOF shield (based on discussions this week) • Shields likely to be fabricated locally to sites (FNAL, RAL) • 1 shield needed @ FNAL and 2 needed @ RAL (tentative) Steve Virostek - - - Lawrence Berkeley National Laboratory

21. Summary • 1st magnet coil winding nearly complete • Second coil former ready for winding • Cold mass support bands complete • Four cryocoolers, HTC leads and magnet instrumentation now on hand at Wang NMR • Power supplies to be ordered this week (UCR) • P.O. placed with Wang for cryocooler testing • Vendor to complete 1st magnet by Nov 07 • Second magnet to follow 3 months later Steve Virostek - - - Lawrence Berkeley National Laboratory