Electronics for testing ATLAS-SCT FE modules

Purchasing Information

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There is a suite of 6U VME electronics modules designed by Cambridge, RAL and UCL especially for testing of single or multiple ATLAS-SCT FE MODULES .

Prototypes have been built and used in the SYSTEM TESTS at CERN since September 1998.

The suggested setup for electrically connected modules is shown in Fig.3 of this document.

For optically connected modules the suggested circuit is shown in Fig.2 of this document.

A brief description of these modules is given below.

CLOAC

The CLOAC ( CLOck And Control ) MASTER Module has been designed and built for ATLAS-STC FE System Tests and Beam Tests, as a stand-in for the eventual LHC-wide TTC System, to allow the synchronization of a number of the MuSTARD and/or Oxford C+C modules to the same Clock and Command signals.

As well as the master 40.08 MHz clock, available on the CLOCKOUT output, the CLOAC MASTER Module generates the ABC-specified command strings for the fast commands : "Level 1 Trigger", with its programmable delay, "Soft Reset" and "BC Reset" are broadcast to all the modules via the DATAOUT output.

Also supported is the Calibration Pulse sequence, which includes automatic "Cal. trigger" after a programmable delay. Other slow commands can also be issued, up to 64-bit length only, but note that these are broadcast to all DATAOUT outputs simultaneously.

Detailed information on the design and functionality of CLOAC MASTER and CLOAC FANOUT modules is available at this URL.

MuSTARD

MuSTARD (MUltichannel Semiconductor Tracker Abc(d) Readout Device) is designed to receive, store and decode the data from multiple ATLAS SCT ABC(D) modules in either the test beam setup or the system test at CERN. It may also be useful in the multiple-module production-test systems.

There are 12 input streams. Each stream is synchronized to the system clock and buffered in a FIFO.

The readout control circuit event-builds the stream data and outputs complete events to the host via a multipage dual-port memory. It also provides the capability of histogramming hit channels on the fly without incurring a time penalty. MuSTARD is an electrical module, ie its data inputs are electrical, differential LVDS.

Detailed information on the design and functionality of MuSTARD module is available at this URL.

SLOG

SLOG (SLOw command Generator) is designed to allow the generation of SLOW commands for the control and configuration of ATLAS SCT front-end chip. It fans out Clock and Fast Commands from an external source (CLOAC) together with internally generated SLOW commands to 12 channels at LVDS levels for use in Multi-Module electrical test setups. Two copies of the Clock and Commmand are also output at ECL levels, so that SLOG can drive 2 Oxford Fibre-Optic Drivers, or more if the UCL fanout module is used.

Detailed information on the design and functionality of SLOG module is available at this URL.

Software

Support software will also be provided.

The estimated cost of each module as a "one off" is:

MuSTARD £ 3.5k
SLOG £ 1.4k
New orders for CLOAC systems are no longer being taken
CLOAC Master £ 1.8k
CLOAC Fanout £ 0.3k

Please remember that the lead time for delivery of the individual electronics modules is governed by the delivery times of some electronics components, and will be a minimum of 10 weeks from the date of ordering.

For further information contact Andy Parker (parker@hep.phy.cam.ac.uk). Unfortunately no more CLOAC modules can be ordered due to discontinuation of parts.