BNL 48D48

Nominal dimensions from drawing

 (Yoke + stock coil pack)
    74" deep (along particle axis)
    92" wide
   148" tall

Nominal dimensions from Whit's measuring tape

 (Yoke only)
    48" deep (along particle axis)
   110" wide
   147" tall
 Yoke Weight: 74.6 tons

Aperture in yoke

   48"   tall
   48"   'deep' (along particle axis)
   18.5" wide   (pole gap)
 NOTE:
   12.5" wide gap if BNL 3" shims are installed

Field

   2.0 T.m    (max 1.69T; at 2kA, power 440kW) -- 'standard'
 NOTE:
   2.5 T.m  *can* be reached by shimming the coils (safest, easiest?)
            - Shims from BNL already exist, the reduce the gap by 6" total.
            - There are also 'booster coils' and a possibility of running
              the coils at higher current.  See Robin's comments below.
   3.0 T.m  is allegedly possible at 4kA (claimed to have been done at BNL)
            - the yoke would be very heavily saturated
            - not modeled by JLab (AFAIK)

Power supply

 - Hall A is purchasing a new power supply for the SBS.  We would
   probably need one for Hall C as well:
     Danphysik PS 2200A / 290V   :                               $181k
   - Could borrow this supply if SBS is idle (?)
 - QTOR supply (9000A / 180V) -- ** should work! **
   - NOTE:  We have the freedom to run coils in parallel -or- series
     with this supply.
   - (We can grab the current leads too.)
   - BNL coils are already split r+l.
   - Resistance for one refurbed BNL48D48 120 turn pack verified to
     be 0.035 ohm by Jack Segal (on-site).  This is consistent
     with documentation suggesting 0.072 ohm/pair (in series).
        2000*0.070 = 140V  --  just fine running coils in series
        2000*0.035 =  70V  --  also no problem running in parallel

Update (Dec 2013)

   - From discussion with Robin (Hall A) about their experience getting the
     48D48 magnet for use with the SBS.  The costs below are based on
     invoiced values from Hall A.
     - Rough cost estimate to get dipole on-site and assembled        $50k
       (based on following points):
       - includes shipping from BNL, missing parts (manifolds,
         leads, bolts, etc), power supply, static stand
       - see power-supply questions
     - Shipping:  5 truckloads @ $1300/truck:                          $8k
     - BNL Coils were not stored well, their condition is unclear.
       HOWEVER, JLab is presently refurbishing (acid flush, etc) the
       coil pack that came with the Hall A SBS magnet.  So far these
       coils are actually looking OK.  My understanding is that these
       old coils would be available for us to use (Hall A is making new
       coils for the SBS).
       (- new coils are expensive:  ie. $140k for the Hall A SBS)
     - BNL discarded/lost all the support hardware for the magnets
       (water, power manifolds, bolts, tension rods, etc).
       - replacement parts:                                          $15k
     - Support stand not included:                                   $15k(?)