NEW SYSTEM

Last updated: 29/09/2008 11:07

• 29/09/2008: RF-TTC FAQs

• 30/07/2008: the synoptics of all the fibres connected for the TTC are available below

• 16/05/2007: All the modules are in production or in preproduction. RF2TTC will be distributed in June, RF_Rx and Tx will be available in Septembre.

• 16/05/2007: The installation campaign of the TTC/BST fibres began. The status is available on the TTC presentations made during the last LEADE meeting.

• 11/12/2006: The RF_Tx_D and the RF_Rx_D have been tested by the AB/RF group, and will be used as their standard modules for all the digital transmissions. The system will thus use digital transmitters and receivers instead of analogue ones (see RF_Tx and Rx pages), which will reduce the price of the system

• 11/12/2006: the RF2TTC board is mostly tested and a second prototype is being produced to be used by the experiments

• 11/12/2006: TTC upgrade system test report is available

• 13/12/2006: A set of modules (RF_Tx_D, RF_Rx_D, RF2TTC and TTC Fanout) will be available to the experiments beginning of January

• 13/12/2006: A new price of this system has been compiled and is available at the end of this page.

The new system will be composed of a backbone managed by the AB/RF group, and a receiver crate installed in the experiments, converting the RF timing signals into TTC compliant Bunch Clocks and Orbits.

RF timing signals:

Three Bunch Clock signals (one for each ring plus one reference clock) will be transmitted, as well as one orbit per ring.

• frequency variation:

• Guarantied period: the period when the Bunch Clock and orbit signals are guarantied to be stable by the AB/RF group is between the first injection to the end of the physics mode of the LHC

AB/RF equipment:

• SR4 installation: optical transmitters for the CCC and for CMS
• Buried optical links between SR4 and CCC, between SR4 and SR5, and between the CCC and SR2, SR1, SR8 and the TTClab
• Equipment in the experiments: optical receivers

TTC equipment in the experiments:

The equipment installed in the experiment is basically a receiver crate, composed of:

•     One Crate controller
•     2 AB/RF optical receivers + 1 hot spare
•     2 RF2TTC modules
•     0 to # Fanout modules

Support and maintenance:

• Monitoring of the AB/RF receiver status
• Procedure before calling the AB/RF piquet

Fibre installation - all the fibres are installed since December 2007:

• The synoptics of the connections are here:
•     General backbone
•     TTC fibres in ALICE
•     TTC fibres in ATLAS
•     TTC fibres in CMS
•     TTC fibres in LHCb

2006 test beam:

• Test beam schedule for 2006
• Plan for September test beam

Global Documentation:

• Global description document
• Money spent up to now on the project

Updated price of the system per experiment:

Previous scheme (with Analogue Tx and Rx):

Note: this scheme does not include, neither the spares for Tx and Rx, nor the cost of the fibre patching.

Note: table extracted from the agreement on TTC upgrade signed on November 2005.

New scheme (with Digital Tx and Rx):

Last Updated by Sophie BARON on 29/09/2008 11:07