1. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 1  TTC system status reminder  Upgrade principle  [Some] details about the infrastructure  Practical implementation UPGRADE OF THE TTC SYSTEM

2. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 2 TTC backbone status Optical transmission of BC and Frev Ensured by the AB/RF group SR4-CCC Frev synchronisation => Orbit BC & Orbit selection (LHC/SPS/Internal) Signals encoding Broadcast to experiments via high power lasers One crate per ring CCC Optical transmission of BC and Orbit CCC-Experiments Reception and decoding of the signals Experiments …+ Experiments

3. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 3 TTC system status  Maintenance problems oObsolete transmission and reception equipment oDesign sources are missing  Increasing number of signals to be transmitted oRing1, Ring2 and Reference Bunch Clocks oRing1 and Ring2 orbit  Limited number of equipment o4 transmitter crates for 3 required => 1 spare o12 receiver crates (TTCmi) for 12 required!!  No solution for on-call support oNo team for the on-call support  No way of remote monitoring and control  No solution to supply a stable clock out of the guarantied period

4. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 4  TTC system status reminder  Upgrade principle  [Some] details about the infrastructure  Practical implementation Outline

5. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 5 Upgrade principle AB/RF transmitters Optical links AB/RF receivers TTC transmitter crates Optical links TTCmi BC1, BC2, BCref, Frev1, Frev2 AB/RF transmitters Optical links AB/RF receivers New RF to TTC interface BC1, BC2, BCref, Frev1, Frev2 AB/RF optical links TTC optical links

6. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 6 Upgrade principle  Use of standard AB/RF transmitter and receiver modules  Operation, maintenance & on-call support of the backbone ensured by the AB-RF operation and piquet teams to the reception level in the experiments  Interface between AB/RF and TTC systems to be redesigned to replace the TTCmi crates, adding the missing functionalities (remote monitoring and control for clock switching and phase adjustment)  Financial effort made by PH/ESS and the experiments for the infrastructure, support manpower provided by AB

7. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 7 Upgrade principle  Agreement between AB/RF, AB/CO, AB/BDI, TS/EL, PH/ESS, and ALICE, ATLAS, CMS, LHCb  A document specifying the principle of the upgrade was signed by all the parties oApproval procedure ended last week, oStill in ‘restricted access’ oComments to be integrated to the document, which will then be released https://edms.cern.ch/document/628545/2

8. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 8  TTC system status reminder  Upgrade principle  [Some] details about the infrastructure  Practical implementation Outline

9. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 9 AB/RF backbone  Standard equipment for AB/RF  6U VME modules with 2 optical units (tx or rx)  SR4 oTransmitters for CMS and CCC (3 Bunch Clocks and 2 orbits)  CCC oReceivers for BST, TTCrd12 (test beam, backup solution), TTC transmitters oTransmitters + splitters for ALICE, ATLAS, LHCb, TTClab  Points 5, 2, 1, 8, TTClab o5 Receivers integrated in 3 VME modules oSpares TX RX-TX-SPLIT RX

10. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 10 Signal delivery at the experiments  Bunch Clock & Orbit oAB/RF receivers oBC ring1 and 2, BC reference. Sinusoidal signal, ~100mVpkpk for ALICE, ATLAS, LHCb, TTClab 600mVpkpk for CMS oOrbit ring1 and 2, 5ns pulse  Machine States oBST system oUsed to recognise guarantied periods of RF timing signals (between injection and end of physics) oRefreshed every ms oTransmitted to experiments from the CCC-BST master via optical fibres (1 per ring) and TTC protocol

11. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 11 Interface to the TTC: the RF2TTC module Preliminary Bunch Clock management (signal conversion, selection, phase adjustment, cleaning, status monitoring Orbit management (signal conversion, selection, signal length and delay adjustment, status monitoring Control & Monitoring RF TIMING SIGNALS BST VME BC AND ORBIT TO CENTRAL TRIGGER UNIT & TTC

12. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 12 TTC equipment at the experiments  Receiver crate o6U VME crate: Replacing 3 TTCmi (3x 3U) Paid by PH/ESS oVME Crate controller Proposed by PH/ESS: VP110 from CCT But CMS and LHCb would like to use CAEN modules oAB/RF receiver VME modules Supported and maintained by the RF piquet Between 2 and 4 VME modules per experiments oRF2TTC VME module Receives timing signals from the AB/RF modules and machine states from the BST optical link Presently being specified and designed oBC and Orbit fanout Presently being specified and designed

13. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 13  TTC system status reminder  Upgrade principle  [Some] details about the infrastructure  Practical implementation Outline

14. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 14 Transition between RD12 and New system  RD12 Transmitters oA small design study will be made to adapt them to the shape of the timing signals oThey will be re-installed in the CCC as soon as the place is available [place reserved next to AB/CO crates]  Receivers oRD12 receiver crates [TTCmi] and the new RF2TTC prototypes will be concurrently installed in the test beam areas for tests and validation oIf this is not enough, the TTCmi can also be also installed in the pit as a backup system during LHC launch  RD12 System Recycling: oRD12 system could afterwards be recycled to provide the TTC timing signals to the test beams areas, in case test beam is needed during runs

15. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 15 Milestones NovDecJanFebMarAprMaiJunJulAugSeptOctNovDecJanFebMarAprMaiJunJulSepOctNovDec 200520062007 25ns structured test beam RF2TTC module specs & design RF2TTC- 5 prototypes production LHC start RF2TTC prototypes validation RF2TTC Production ~20 pieces Fanout design Fanout validationFanout Production NEW DESIGN AB/RF AB/RF modules prototyping & validationModules production INSTALLATION re-installation in CCC Test Beam TTCmi Installation in the experiments [if required, as a backup solution] RD12 FIBRES NEW [reduced] design Installation [reservation] [patch panels] Fibre request to TS/EL TTCmi Installation in the test beam areas for test beams during runs [if any] Proto installation in the test beam areas and in the TTC lab Control software writing Equipment installation in the pits Full system tests Modules delivery System Validation Min 3 months before start – ‘RF’ signals available from SR4 Standard equipment purchasing

16. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 16 On-going discussions  Can we standardise the crate controllers? o~ 1 controller type per experiment…(CCT VP110, CAEN USB or PCI controllers) oAnd thus can we standardise the control software?  How to provide the access for the AB/RF piquet to their modules oRemote Define procedures? Publish module status on the web? oPhysical Try to ease the physical access (special case of ALICE/)  RF2TTC module specifications

17. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 17 Project follow-up a web page is available: http://ttc-upgrade.web.cern.ch/ttc-upgrade/ (there is also a link from the TTC web site: http://ttc.web.cern.ch/TTC/)http://ttc.web.cern.ch/TTC/

18. Sophie BARON, PH-ESSLEADE - 07 Nov 2005 18 Useful links  TTC web page: http://ttc.web.cern.ch/TTC/  TTC upgrade web page: http://ttc-upgrade.web.cern.ch/ttc-upgrade/  TTC upgrade approval: “TTC System Upgrade - Project Definition” https://edms.cern.ch/document/628545/2  BST: “The Interface and Structure of the Machine Beam Synchronous Timing Message for The LHC Experiments” https://edms.cern.ch/comment/638899/0.1