Scheduled to begin August 6th. Immediately after the BM109s, the DS steel will be removed and the calorimeter relocated.
There are 2 loading issues to address &endash; soil loading and MB tunnel loading. Based upon 1970 soil borings, soil capacity in the MC area is relatively low, 2K lbs/sq ft. Typical soil loading at Fermilab is 3-5K lbs/sq ft. The JGG (total weight &endash; 270 tons) footprint yields ~4800 lbs/sq ft. Both the JGG & Rosie will have to have a 12" thick concrete slab under them to distribute the weight. The calculations for MBottom are not complete. However, it is evident that some type of steel(?) support will have to be added in MB. Calculations, design and drawings will be completed by August 10th.
Note: with a 1-foot slab under the JGG, the new beam height would be 80.5 inches. Additional info - Rosie weight is 190 tons and would have to be elevated ~25 inches (per Byron Lundberg, the beam height in Donut was 71.8 inches above floor level where Rosie was located).
Peter needs to contact Rich Schmitt regarding gas and safety clearance for TPC operation. Additional reviews that will have to be prepared for are all gas system and low voltage high current systems. Also, electronics power loads have to be established. Note for Jim Klimer: as previously thought, Dan Kaplan will not be able to provide help with the hydrogen target.
Mechanical engineer will be need for modification on the old E690 chamber support stand to accommodate the TPC. Other chamber support stands will also be needed.
Per Chuck Grozis, the repair of the JGG coil is progressing. Fermilab supplied Scotch ply, which is made only by 3M, therefore, a long delivery item. Also, Chuck will have a look at the damage, which was done to Rosie's coil during removal at PW8.
A decision has been made NOT to pursue moving the primary target upstream 100 feet, but rather to leave the primary target and target box at the present location in MC6. There are several reasons: the space required to move the target up into the "W" area of ME6 is marginal and would require further study; the requested upstream dogleg would have to be eliminated; and MB floor loading becomes an issue in that area because 3 feet of steel would be needed above the target.
Additionally, moving "only" 100 feet still leaves two issues open in MC7. The location of Rosie would still be near enough to the upstream end of MB7 that load analysis, and probably the need for shoring, would still have to be completed for MB7. Secondly, because of the limited staging space between MC & MW tunnel and between MC & MP tunnel, a machine of sufficient capacity to lift the steel pieces of the JGG and put them into place probably would not fit far enough upstream to do the job.
Waiting on input from Tom K. For 907, Beam intensity will be 9 x 1011/3 second cycle. The accident pulse is 3 X 1013/3 sec cycle over one hour.
Short term Schedule:
The next meeting will be Wednesday, August 1st, Theory Room, WH3NE at 10:30AM.