Version 1.0
GTK technical specification for DCS (Detector Control System
Introduction
This document describes the types of crates and modules composing the “off-detector”
readout system for the GTK subdetector and the GTK stations
The DCS should perform a set of standard control / monitoring functions on the crate
power supplies of the “off-detector” electronics. The “off-detector” GTK readout card (GTK-RO)
will also monitor some local variables whose status could be monitored by the DCS: this document
provides a list of such variables at point e).
This document does not cover the topic of configuring the Gigatracker ASICs (“TDCpix”)
configuration. The Gigatracker subdetector PCs will maintain the information concerning the
configuration and the status of the TDCpix on the GTK stations and the handling of these
parameters will then be covered in a separate document.
GTK-RO: “off-detector” read-out system
a) Types and quantities of standard VME crates:
Four VME crates located in the farm room in racks: they are one each in rack S16 and S14 and
two in rack S15 (of the 2 in rack S15 one if for the GTK-RO cards and one is for the main timing
unit)
The picture is taken from: “Specifications for fibers, power, cooling and racks”; A. Gianoli,
E. Leonardi, M. Serra, P. Valente; revision 0.5 2011-06-08.
The characteristics of the VME crates (all are the same) for the “off-detector” electronics are
summarized in the table below:
LHC Manuf
Description
inv no part no
7113 0P06.0710 6U (+3.3V/100A, +5V/100A, +-12V/10A, 48V/12A)
7129 0B06.025J VME64x BIN Local 21x6U
7130 0F00.0600 6U FM (160mm) Eth+RS232
b) Controls to be performed on each crate:
No special functions need to be implemented for the VME crates. The standard controls and
monitoring of any VME crate are sufficient:
1) Supply Voltages and currents; only +5V and +12V are used by the GTK-RO cards
2) Temperature
3) Fan speed
Cables
1) the standard for the type of the intelligent fan tray listed above (0F00.0600)
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additional (non mandatory) requests to the DCS
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Gigatracker hardware status variables:
Each GTK-RO card provides the 6 status variables listed below:
- the FPGA temperature (1)
- the level of received optical power for each of the 4 fast data input optical links
- the level of received optical power for the (1) slow data input optical links
The subdetector PC will implement a DIM server through which the values of these
variable for the total 30 GTK-RO cards could be made available to the DCS.
Questions for the DCS developers:
 Would it be possible for the DCS to include the optional logging of these variables
(the sampling time or the sampling rate would not be critical)?
 Could the DCS implement the setting of a WARNING flag if any of the FPGA
temperatures rises above a set point?
GTK stations
Low Voltage (LV)
a) Types and quantities:
1) Three racks are located in the Experimental area; one rack for each station.
2) Each rack carries one crate type CAEN-EASY 3000, for a total of three crates.
3) Each crate hosts two modules type CAEN 3009K (12 channels floating 0 to 2V) and
one module type CAEN 3009 (12 channels floating 1.5 to 8V), for a total of six
modules 3009K and three 3009.
4) One module type CAEN A3486 to provide 48V for EASY 3000 crates.
a) Controls to be performed on each crate:
1) Voltage (5/12/… V) and current (control of each module made by the mainframe)
2) Temperature
3) Fan speed
b) Controls to be performed on each module:
1) Voltage (2/3/5 (?) V) and current
c) Cables
d) Four twisted-pair cables to connect the three crates and the module A3486 to monitor
the crates and the single modules located in each crate.
e) Status of installation and procurement
Twisted-pair cables have been installed (To be confirmed by Gilles Maire).
a)
b)
c)
d)
1) Crates and modules are not yet available. Order to be placed.
High Voltage (HV)
Type and quantities
1) Located in the surface building near the Control Room
2) One mainframe type CAEN SY 2527
3) One branch controller CAEN A1676
4) Three channels served by one module CAEN A1835 (HV 1.5KV – 200µA)
Controls to be performed on the mainframe
1) Voltage (5/12/…) and current
2) Temperature
3) Fan speed
Controls to be performed on the three channels in module CAEN A1835
1) Voltage (range 10-1000 V)
2) Current
Cables
1) RG58 cables. Three cables have been already installed. To be confirmed by Gilles
Maire.
e) Status of installation and procurement
Three cables have been installed (To be confirmed by Gilles Maire).
Crates and modules are not yet available. Order to be placed.