Where do all the cables go?

Combo cabling / cable numbering /  sc cabling / link cabling / radiation monitors/ table /back

COMBO cabling

How is the cable numbering/ordering in ladders and wheels?

Indicated is the order of the cabling for the ladders: first output cable modules  0-3, the second 4-7 etc. (N.B i.e. not the module numbering)ladder_numbering

Indicated is the order of cabling for the wheels: 0-3 for the first output cable, then 4-7 etc.wheel_numbering

SC Cabling

Items:

  1. On every ladder one of the 5 hybrid temperature sensors is read out (on the picture above those on ladder nr. 4 and 9), but all  combo cables are connected to the patchbox board; one of the ladder sensors  is selected there. For the wheels 2 sectors (on top and bottom) have hybrid temperature sensors on every wheel in that sector.
  2. 3 ladders with 4 extra NTC hybrid sensors ( so for those 5 per ladder) each and 3 wheel sectors with 4 extra NTC hybrid sensors each.
  3. Miscellaneous (STP cables from detector to patch box):
  4. Beam pipe temperature sensors: 19 sensors (cabling and connectors under responsibility of Uwe Schneekloth).  They are held outside the MVD shielding and patchbox. The idea is: to use STP cable on the beampipe, combine the cables at either end of the detector (9/10 sensors at either end), connect the STP-cables to D-connectors and go down with the cables in the space in front of RCAL or FCAL. Sensors 1-3 and 18-19 are used to detect condensation and 4-17 to prevent overtemperature of the beampipe (limit at 50 C ?).

Wires of (1) and (2) are included in the combo cable. In the table below the number of outputs is calculated per patchbox under the assumption of  20 Combo cable inputs per SC patchbox board and barrel/wheel cables kept apart.  SC output cable and connector: standard cable plus D connector;   same type  on all patchbox boards.

Link Cabling

 From 4 ladders 5 COMBO cables each (so 20 in total) are fed into a link patchbox board. For the wheels that number is 16 at maximum per patchbox board. The output is on RJ-45 cables and connectors with 4 link signals each (signal1=dummy1, signal2=analog2 etc; pin 9 and 10 are ground). Cables of barrel ladders on patchbox A and B go to ADC crate 1, those on patchbox C and D  to ADC crate 2. All wheel cables go to ADC crate 3.

                                       

Radiation Monitors 

Four Radiation Monitor cables of the rear detectors go to patchbox C, flange hole nr. 5:  R0,R1,R2,R3. They share the zipper with the MVD-SC STP cables. The four cables of the forward detectors go to patchbox D, flange hole nr. 7: F0,F1,F2,F3. Here we assume the following numbering convention for both the forward and rear monitors, as seen from the rear (RCAL):

Table of Link and SC inputs and outputs (clockwise counting of boxes):]

PatchBox Ladder/Wheel/Other inputs LINK outputs SC outputs Temp sensor subdivision
1=A L 8*5 40 (20 +20) 12 (8 + 4) 8 hybrid + 4 det. sensors 0.0
,, W 3*4 12 4 4 det. sensors sector 0
2=B L 7*5 35 (20 + 15) 11 (8 + 3) 7 hybrid + 4 det. sensors 2.4
,, W 4*4 16 8 4 hybr. sensors sector 3 +

4 det. sensors sector 4

3=C L 8*5 40 (20 + 20) 8 (4 + 4) 8 hybrid sensors
,, W 3*4 12 0 -
O 5 na 5 see SC cabling item 3
4=D L 7*5 35 (20 + 15) 11 (8 + 3) 7 hybrid + 4 det. sensors 0.3
,, W 4*4 16 8 4 det. sensors sector 13 +

4 hybr. sensors sector 10

In which order the outputs appear on each board depends on the precise ordering of the cabling: this is trivial for the wheels but not for the ladders. For e.g. patchbox 1=A the ladder order could be according to layer order(A): 0.0, 1.0, 1.1, 1.2, 2.0, 2.1, 2.2, 2.3 or  by geographical cable coherence (B): 0.0, 1.0, 2.0, 2.1, 1.1, 1.2, 2.2, 2.3.  The ladder ordering for the patchboxes used below is (B).
patchbox combo cabling
Patchbox flange hole nr ladders

sectors

1=A 0 0.0,1.0,2.0,2.1 0
1 1.1,1.2,2.2,2.3 1,2
2=B 2 0.1,1.3,2.4,2.5 3,4
3 1.4,2.6,2.7 5,6
3=C 4 1.5,1.6,2.8,2.9 7
5 0.2,1.7,2.10,2.11 8,9
4=D 6 0.3,1.8,2.12,2.13 10,11
7 1.9,2.14,2.15 12,13

For more info about cable routing see the index of the postscript drawings: the  Cable Roll-Out in the MVD volume (zmm004.ps) and the Cable Layout at the Rear Barrel Flange (zmm002.ps).

The MVD-SC cables go to PatchBox C through flange hole nr. 5. In addition there are 8 STP cables from the hardstop switches  in the bundle.

Below the SC output ordering for all 4 patchboxes:

board PatchBox 1=A PatchBox 2=B PatchBox 3=C PatchBox 4=D
1 hybr sensor 0.0, mod 0 hybr sensor 0.1 hybr sensor 1.5 hybr sensor 0.3, mod 0
hybr sensor 0.0, mod 1 hybr sensor 1.3 hybr sensor 1.6 hybr sensor 0.3, mod 1
hybr sensor 0.0, mod 2 hybr sensor 2.4, mod 0 hybr sensor 2.8 hybr sensor 0.3, mod 2
hybr sensor 0.0, mod 3 hybr sensor 2.4, mod 1 hybr sensor 2.9 hybr sensor 0.3, mod 3
hybr sensor 0.0, mod 4 hybr sensor 2.4, mod 2 - hybr sensor 0.3, mod 4
hybr sensor 1.0 hybr sensor 2.4, mod 3 - hybr sensor 1.8
hybr sensor 2.0 hybr sensor 2.4, mod 4 - hybr sensor 2.12
hybr sensor 2.1 hybr sensor 2.5 - hybr sensor 2.13
2 hybr sensor 1.1 hybr sensor 1.4 hybr sensor 0.2 hybr sensor 1.9
hybr sensor 1.2 hybr sensor 2.6 hybr sensor 1.7 hybr sensor 2.14
hybr sensor 2.2 hybr sensor 2.7 hybr sensor 2.10 hybr sensor 2.15
hybr sensor 2.3 - hybr sensor 2.11 -
3 hybr sensor sector 0, det 0 hybr sensor sector 3, det 0 - hybr sensor sector 10, det 0
hybr sensor sector 0, det 1 hybr sensor sector 3, det 1 - hybr sensor sector 10, det 1
hybr sensor sector 0, det 2 hybr sensor sector 3, det 2 - hybr sensor sector 10, det 2
hybr sensor sector 0, det 3 hybr sensor sector 3, det 3 - hybr sensor sector 10, det 3
- hybr sensor sector 4, det 0 - hybr sensor sector 13, det 0
- hybr sensor sector 4, det 1 - hybr sensor sector 13, det 1
- hybr sensor sector 4, det 2 - hybr sensor sector 13, det 2
- hybr sensor sector 4, det 3 - hybr sensor sector 13, det 3

Luc Jansen has made a detailed scheme for the wiring of the SC modules.

Last changed on: Mon, 12-4-2001  by Leo Wiggers