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SHMS Spectrometer Update Hall C 2008 Users Meeting

SHMS Spectrometer Update Hall C 2008 Users Meeting. Paul Brindza January 18, 2008. SHMS Design Parameters . SHMS 2008. HB a la MSU/NSCL 2008. MSU design has warm iron Meets SHMS spatial requirements Features a helium cooled coil and self supporting cryostat Trial Coil winding in 2008.

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SHMS Spectrometer Update Hall C 2008 Users Meeting

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  1. SHMS Spectrometer UpdateHall C 2008 Users Meeting Paul Brindza January 18, 2008

  2. SHMS Design Parameters 

  3. SHMS 2008

  4. HB a la MSU/NSCL 2008 MSU design has warm iron Meets SHMS spatial requirements Features a helium cooled coil and self supporting cryostat Trial Coil winding in 2008

  5. Q1 2008 • Trial wind R&D resulted in higher turns density • 70 -> 92 turns/coil • Q1 2008 is shorter- same length as the HMS Q1 • (96 in. vs 107 in.)

  6. Q23 2008 Force collar Aluminum 6cm -> 11 cm Coil “Keys” stainless Yoke ID 69->73 cm Length reduced by 12 cm Performance & size OK

  7. Dipole 2008 Force collar 10 ->18 cm Yoke ID 69->79 cm Collar is Aluminum Coil “Keys” are Stainless Magnet OD is the same

  8. SHMS Support Structure and Shield HouseRecent work by ALION-JJMA Dec 2007 • Design updated to current SHMS design • “slider” removed-all magnets now fixed • HB magnet inserted • Current design for magnets and detectors • Current angular range (5.5 to 40 degrees) • Current angle SHMS-HMS (18 degrees) • Preliminary Shield House design with side access- shielding simulation underway.

  9. Q1 Trial winding- 2007 results • JLAB contracted with Scientific Magnetics to develop Q1 coil tooling and wind coils • Phase 1 is complete and produced one full size trial coil that passed all tests • Phase 2 is about to start and will produce 2 full size Q1 coils • Phase 1 demonstrated a higher turns density(92 vs 70) resulting in a shorter Q1

  10. Q1 Trial WindingB stage tape application (left) Coil end turn former (right)

  11. Q1 Winding Tooling

  12. Q1 Full Size Coil Sept 2007

  13. Uniformity of Q1 Coil straight section height

  14. Verification of Insulation Integrity

  15. SHMS Conductor Testing Complete

  16. Q23 and Dipole Force Collar Analysis • Parallel analysis projects at JLAB, FNAL, ACCEL and NOVATECH • Consensus results( ie typical data) suggest Use thicker Aluminum Force collar Use Stainless “keys” instead of Titanium Preload achieved after cool down Coils stay clamped at Max Field • Need to measure copper stabilizer properties at 4.2 Kelvin- R&D at FNAL in 2008

  17. Dipole and Q23 FEA results ACCEL FERMI NovaTech JLAB

  18. SHMS Conclusions • Improvements in magnet designs have increased the available free space along SHMS optical axis • R&D program: HB Design, Q1 Trial Wind and Force Collar Analysis resulted in improvements in the SHMS design and Value Engineering • Support Structure design work has advanced credibility and confidence in SHMS Design. • Believe it or not we will start SC magnet procurement this summer!!!!!

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