From:   FNALD0::GALLAS       "Elizabeth Gallas - UofTX Arlington" 
                                                11-FEB-1998 11:53:49.07
To:     FNAL::MATESKI,FNAL::DFM,FNAL::HJS,CHRISTENSON,DEAN,MJOHNSON,FNAL::EOP
CC:     @ME:ICD_UP,GALLAS
Subj:   summary of the meeting under the pig trough - ICD PMT crate space

Here is a summary of the meeting to go over space under the pig trough
for the ICD PMT crate.  
In attendance: Del Miller, Herm Stredde, Jack Mateski, Elizabeth Gallas.

There will be 4 ICD PMT crates, one under each pig trough.  I will only
talk about one, but remember there are 4 operationally identical units.

The ICD PMT exterior crate dimensions are depth = 20 5/8"   (x - horiz)
                                          height = 11"      (y - vert)
                                          width nearly 31"  (z - beam)
Height and width are final and iron blocks have been machined and are
currently being painted in Fort Worth TX.
These dimensions have been reduced in depth by 1.25" in the electronics
section of the Crate since the TDR.   
The crate will be mounted in x as close to the cryostat as possible, but
additional reductions in the crate depth would ease the cabling at the
drawer face, so dimensions are not final.

JIA LI: please make the final  drawings for the IRON BLOCK including the
mouting bolt locations  available from your web  page. send a message to
Jack MATESKI@fnal.gov and Elizabeth when this is done. Include a list of
all completed drawings to date.

Appendages to each ICD PMT Crate

1.  FIBER CABLE STANDOFF

    A fiber cable standoff to protect the fiber cables/connectors coming
    off the side of the  crate is being designed  by Jia Li. The current
    dimensions  of this  appendage is  z=2",  y=11", x=8".  There was no
    feeling that this 2" in z is a problem since the cables will need to
    come out roughly this distance  anyway to get around the wall of the
    EC.

3.  LOW VOLTAGE FANOUTS

    Lee Sawyer  and Co  (Louisiana Tech)  are designing  fanouts for the
    preamp  low  voltage  supplies  and the  pulser.   The  total height
    available between the  bottom of the pig  trough and the top edge of
    the cable  wider is about  15".  So as  previously  discussed, these
    fanouts to be mounted underneath  the crate, can occupy no more than
    2 1/2" below the bottom of the crate.

3. HIGH VOLTAGE  FANOUTS 

    High voltage fanouts (Maryland Boxes) will be located to one side or
    the other (in z) of the PMT Crate, mounted below the pig trough. The
    current feeling on  the crate location is  closer to the CC to avoid
    interference with the  bolts of the cable  standoffs which constrain
    the cables in the cable winder.  EG thinks that we currently have 96
    HV lines coming in on 12 Reynolds  cables. This means there are 6 MD
    boxes since (each with 2 reynolds ina and 16 single line hv out). We
    need the dimensions of these HV fanout boxes. 
    HV plans are not complete and more time is required.

CABLE SUMMARY TO EACH CRATE (yes we still need to report to Ed on details)
-------------------------------------------------------------------------
SIGNAL      - 16 26 LINE T&F (just like calorimeter cables)
HV          - 12 REYNOLDS (TOTAL OF 96 SINGLE HV)
LV          - 3 levels of lv needed (+ gnd?), but may be required to be
                carried on more lines due to safety requirements
PULSER      - unknown since pulser design undetermined - cabling 
                is similar to LV needs with as many as 32 channels
CALIBRATION - 2 options (monitoring lines and pulsers all LV):
                LASER - one fiber trunkline
                        3 or 4 lines for pin diode monitoring
                LED   - one line to pulse one or more LEDs
                        3 or 4 lines for pin diode monitoring