ZDC Status, 9th December 07

1
ZDC Status, 9th December 07

• Fitting in the TAN slot
• Getting in and out of the TAN
• Schedule
• Trigger

Yasar Onel (Michael Murray) for ZDC group
2
Several problems fitting in TAN

• bumps in the ZDC, biggest bumps flattened
  threaded rods were inserted through the empty
  screw holes in the 2 hadronic modules
• Poor assembly of TAN improved
• The slope of the LHC, the bottom of the ZDCs has
  been bevelled
• Limitations of crane Paul and Ianos have come up
  with a much better design that should be much
  cheaper than option proposed by CERN. (See
  ZDC_crane.ppt for full details)

3
Partial Vertical Extraction

• Twin Lead screws (not shown) located vertically
  between each end of the
• Lift frame and outer frame pull ZDC from slot..

4
Full Extraction
5
Partial Rotation

• Clever Bell assembly is rotated slightly upward
  and out toward transport
• side of tunnel. Motion is again by a pair of lead
  screws which span
• between each set of fixed and rotating leaves.

6
Clever Bell mated to Shielding Pig

• Clever Bell assembly mates on alignment pins to
  pig. Alignment blocks
• on sideof TAN allow accurate pre-placement of pig.

7
ZDC Fully lowered into Pig

• Human intervention then to disconnect ZDC
  fromcrane. Pig is removed,
• pig containing copper bars put in place, affixed
  to crane and procedure
• reversed. Copper bar module must be built to
  duplicate the manner in
• which ZDC attaches to lift frame.

8
Schedule

• Right hand ZDC will most likely be installed
  sometime in weeks 7,8 or 9, left sometime between
  Feb 24 and Apr 9
• Getting crane approved and built by then is a
  great challenge but everyone on ZDC team will
  work on this
• KU, Iowa will cover these times but we could do
  with help

9
Trigger

• ZDC has very simple on, off contributions to
  trigger that will be used for beam tuning,
  diffraction and heavy ion.
• Need to start programming frim-ware for this. One
  student coming to CERN for 3 months, perhaps he
  could learn how to do this.

10
ZDC gt LHCC

• We have not yet presented ZDC project to LHCC.
  Skuja approved the the report but we are trying
  to improve its look and feel
• Oleg and David dEnterrira are working on this