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SBS Magnet and Support Status

SBS Magnet and Support Status. Robin Wines. Magnet Status. 48D48 Dipole Magnet from BNL BNL has 4 in storage BNL agrees to disassemble and ship to Jlab Visiting BNL to discuss assembly procedure and details of magnet fabrication. SBS Magnet Parameters. 48D48 Magnet Modifications.

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SBS Magnet and Support Status

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  1. SBS Magnet and Support Status Robin Wines

  2. Magnet Status • 48D48 Dipole Magnet from BNL • BNL has 4 in storage • BNL agrees to disassemble and ship to Jlab • Visiting BNL to discuss assembly procedure and details of magnet fabrication

  3. SBS Magnet Parameters

  4. 48D48 Magnet Modifications • 2 yoke sectors machined for beam line slot • New saddle coils with ends sized to clear beam pipe • but • Beam pipe location changes in different configurations • Saddle coils make it difficult to move or change out the beam pipe

  5. Magnet Modifications Revised • Use one existing saddle coil • 2 new racetrack coils • Racetrack coils allow ease of beam pipe access and aid in shielding • Additional Machining on corners to clear BigBite configurations • To-do • Analyze stray fields and shielding requirements • Complete design of new coils • Detail yoke modifications • Assembly procedure

  6. SBS Kinematics

  7. SBS Configurations • Iterations of design layout and Kinematics of all Experiments to alleviate interferences such as: • magnet to magnet, utility supports, field clamps, location of • beam line and gate valve, BigBite shielding, HRS support links • SBS at distances from target of 1.6 meters to 3.0 meters • BigBite at distance of 1.5 meters from target • Angles require close proximity of SBS and • BigBite • At pivot, support to floor limited by HRS • support links • GMn kinematics define limits for • supporting SBS magnet

  8. SBS GMn Q2 =6.0 Location of SBS magnet limits support to floor over pivot link

  9. SBS GMn Q2= 10.0 Close proximity of SBS and BB requires modifications to SBS and shielding consideration

  10. SBS GMn Q2= 13.5 Increase slot size to clear beam pipe

  11. SBS Magnet Support Design concept based on use of 2nd 48D48 magnet yoke pieces used as counterweight base –total 150 tons 4 Hilman Swivel Rollers to move and position magnet- total load of 330 tons Magnet fixed on ledge of base

  12. SBS Magnet Positioning

  13. Summary To meet Program Milestones, SBS Magnet and Support designs need to be finalized and detailed by March 2013 Ask collaboration to review Kinematics and provide details of detector requirements (support points, weights, size, lifting…….)

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