![[DESY]](DESY.gif)
OTR Readout Schemes
![[JINR]](JINR.gif)
Introduction
The assembly of OTR frames and the preparation of cables, TDCs, ASDs,
feed-through boards (FTBs),
HV boards, etc. requires to develop the distribution
of the readout electronics.
This rather complicated due to the non-regular OTR geometry,
large number of channels (nearly 120,000),
tight space inside the outer frame not allowing the cable sorting.
You can scroll or quickly jump to:
Documents for 2000/2001 shutdown,
Connect diagrams,
FTB,
Modules,
Signal cable lengths,
TDC,
TDC cable lengths,
TLB,
LV,
"Rame",
MSL1,
MSL2,
Mini-TC,
HV,
HV test results,
Full tables,
Statistics,
Labeling,
Related documents,
Colors red, green, blue correspond to different stereo layers.
Module positions have been obtained from the ARTE program for OTR geometry.
By the way, here is a history of cable connection
for TC2, -x, +y.
Please note that I use module numbers which slightly differ from formerly used.
If I would number cables according the the formerly used module numbers,
then cables in sectors 1 and 2 would number not in the order of X coordinate.
Therefore I have renumbered modules of the right half
in groups tc-100, tc-1, tc-4, tc-6.
For example, in
module position file for TC2
The length calculated by the program (length) and the length the coax
cables must have (L) are related by:
In addition it is advisable to add another 2cm for spare:
Cable length is 6.5-7.5 m for TC2 -x,
6.5 m for TC2 +x,
5.5 m for PC Super layers.
Source for these distributions can be found at
this page by FLT group (Mapping from TDC to Link Boards)
General scheme of HV group distribution was done by H.Kapitza:
New proposal for TC and PC layers,
Old proposal for TC layers.
These HV cable distribution were made with 16 connectors per HV group,
therefore HV-type feed-through board has 64 connectors.
Explanation of column names:
(detailed explanation see in
paper by E.Michel et al.)
Special module at PC +x side: sectors 1 and 4 in one module!
Your suggestions, comments, questions are welcome:
Documents for 2000/2001 shutdown
Data files
t2-1-22 tc-5d16-12+ tc-100+ 85.638 2319.091 13097
t2-1-23 tc-5d16-22+ tc-100+ 63.888 2319.091 13109.6
t2-1-24 tc-5d16-32+ tc-100+ 42.138 2319.091 13122.2
was changed to
t2-1-22 tc-5d16-32+ tc-100+ 42.138 2319.091 13122.2
t2-1-23 tc-5d16-22+ tc-100+ 63.888 2319.091 13109.6
t2-1-24 tc-5d16-12+ tc-100+ 85.638 2319.091 13097
You could see the TC2 cable order
for old numbering and
new numbering schemes.
The same renumbering is to be made also in TC1 and PC1-PC4.
The order in MC1-MC2 should not be changed.
We take into account (now only for MC1-MC2!) that
in the cap region (where two halves of superlayer overlap)
it is possible that cables cannot go along stright line
because of the inner frame ledges. This make an additional enlargement of lengths.
L = length + 1cm + 7mm - 2mm = length + 1.5cm
--> L = length + 3.5cm
and to round to the nearest integer N.
These numbers are shown in the tables for each modules.
![[TLB]](FLTlogo.gif){kind=small}
Changes are the following.
Changes are the following.
Changes are the following.
Column Meaning Structure
====== ============================== =====================================================================
gencha General channel ID: superlayer - stereo layer - sector - channel No. (general)
modcha Module/channel ID: superlayer - stereo layer - module No. - sector - channel No. (module)
modhv HV cable ID: superlayer - stereo layer - module No. - sector - HV cable No. (module)
ftbpos Connector position on FTB: superlayer - FTB row - FTB No. - connector position (ASD-8 B.)
ftbasd cable ID (ASD-8 board -> TDC): superlayer - stereo layer - sector - ASD-8 board ID
ftbhv HV cable position on FTB: superlayer - FTB row - FTB No. - HV (module) cable position
ftbcab HV cable ID: superlayer - FTB row - FTB No. - HV cable ID (HV distr. box)
lvpos LV distrib. board connector ID: superlayer - LVB No. - connector position (LV cable)
lvcab LV ASD-board cable ID: superlayer - stereo layer - sector - ASD-8 board ID
tdccab ASD-8 Board ID: superlayer - stereo layer - sector - ASD-8 board ID
tdccon connector ID on TDC board: superlayer - TDC crate No. - TDC board No. - connector ID
These files have very long lines. They can be viewed, for example, in Netscape.
Selected columns you can display by command
showtab -p4- ftbasd gencha1 gencha2 modcha1 modcha2 | less
The script showtab can be found at
/afs/desy.de/group/hera-b/OTR/scripts .
OTR cabling statistics
Labeling
How various items should be labeled:
Modules are numbered from left (-x) to right (+x)
(for details see this).
Related documents
WWW pages:
Postscript documents:
Some useful schemes from this paper are here on-line:
Double:
-x 10mm,
-x 5mm,
+x 10mm,
+x 5mm
Single 10mm:
-x,
+x
Two-fold 5mm:
-x,
+x
View of hexagonal cells with wire numbers.
This is a standard module.
Here are transparancies with introduction on ARTE table usage:
Postscript file.
Questions on GEDE tables and different other aspects of OTR-specific items in ARTE are answered.
(Copy for 2-up printing is here).
Alexander Lanyov
Andrey Moshkin