TTC Information Meeting 03/06/2005 TTC Information Meeting 3rd June 2005 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS Aims of this meeting Agreement on: Clock sources TTC backbone upgrade principle Discussion on: TTCmi upgrade specifications Information on: Fibres/attenuators procurement 2005 commissioning 2006 Test Beam TTC module production AOB Invited: P. Baudrenghien Invited: P. Baudrenghien, L. De Jonge Invited: L. De Jonge 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 Available Clocks/Orbits TTC upgrade TTC backbone upgrade TTCmi upgrade Fibres/attenuators procurement 2005 commissioning 2006 Test Beam Production news AOB 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 RF signal definition 2 rings 1 RF system / ring independent During the acceleration ramp, can be driven at different frequencies (p-Pb collisions) the 2 RF are naturally convergent, and are equal to a reference value during physics For observation during the acceleration ramp, the 2 RF are provided to AB/BDI via BST and experiments via TTC. RF Frequency Injection @ 450 GeV equivalent Protons 400.78879 MHz Lead ions 400.78406 MHz Flat Top @ 7000 GeV equivalent 400.78966 MHz 400.78964 MHz 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 RF signal generation RF tracks the raising magnetic field during the ramp RF = sinusoidal signal with its phase changing continuously RF Spectrum is not perfectly clean (spurious) Might be a problem for the beam lifetime (potential emittance blow-up) Filtering expected from the VCXO, but still a concern To solve this (potential) noise problem use a fixed reference frequency, generated by a pure commercial synthesizer. Once at top energy, before the physics starts, re-synchronizing of the 2 rings with this reference. (like during test beams). More complex. 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 At the TTC level Source signals Guaranteed period Outside RING1 BC Stable during physics Can be (almost) everything Orbit RING2 REFERENCE Signal artifacts (reminder): Nothing during access, after beam dump, during shut-down or repair During physics the RF guaranties a clean, stable, non-interrupted BC and Frev Implications for TTC: Is this reference clock needed? => if yes, we have to ask the RF to provide it Need for common clock outside the LHC physics? (Cosmics, …) Need to be able to switch from the machine clock to a internal clock outside the guaranteed period 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 Available Clocks/Orbits TTC upgrade TTC backbone upgrade TTCmi upgrade Fibres/attenuators procurement 2005 commissioning 2006 Test Beam Production news AOB 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 TTC system status The TTC transmission crates (in CCC) are getting old Only 4 crates + 1 The number of RF pairs have increased Some lasers are ageing… …and are obsolete as some other components Some schematics are missing Same problem for the receiving crates in experiments and labs Only 12 crates, and also getting obsolete We are crucially missing remote monitoring 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 TTC backbone upgrade Backbone: from SR4 to the experiments Encoded BC & Orbit Bruce’s Scheme 4 crates: 1 TTC 1 TTC/SPS 1 TTC spare 1 BST 1 + spare Present Scheme 4 crates: 1 TTC ring 1 1 TTC ring 2 1 TTC ref? 1 TTC spare RF transmitters RF receivers 2/3 + spare 3 or 6 fibres needed (5 compensated only) 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC backbone upgrade options 03/06/2005 TTC backbone upgrade options OPTION 1: redesign the TTC crates in CCC 3 central crates in the CCC + spares (assuming that the reference clock is needed) New hardware, with Signal shaping (RF signals are sinusoidal) monitoring BC switching - PLL Transmission protocol Re-encoding, or 2 separated fibres 160.32 phase 80.16 ref I/P 40.08 mon I/P I/P sync O/P data LHC SPS orbit Laser O/P I/P Optical splitter Enc o/p A data i/p Sync o/p B data i/p TDM BM Orbit synchro VCXO-PLL Cd monitor I/p O/p ready reset 40.08 I/p LHCrx -2Vreg 1 ClkGen 4 . 8 M H Z Int Ext I/p To exp Next crates LHC orbit SPS orbit 40.079 MHz clock PRINCIPLE: basically just re-transmit the signals delivered by the RF QUESTION: who will do the 24/24 support? 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC backbone upgrade options 03/06/2005 TTC backbone upgrade options OPTION 2: AB/RF extends the transmission of its signals up to the experiments Could deliver directly to the experiments: RF frequency /10 (40.078xx MHz) - sinusoidal Orbit pulse 5ns Probably on 2 separated fibres RF receivers = VME64 6U modules with a simple monitoring of the optical signal via VME No special hardware needed (VME 6U crate + SBC for monitoring) A priori, 2 rx or 2 tx per RF module (BC and Orbit on separated fibres) 1 rx/tx pair ~ 5000€ New TTC module design required (~TTCmi): signal shaping, monitoring, Clock switching PLL Clock & Orbit Fanout INTEREST: Rx/Tx hardware already selected Existing team for the RF support (RF piquet) PRINCIPLE: basically just extend the signals delivered by the RF up to the experiments 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC backbone upgrade options 03/06/2005 TTC backbone upgrade options If agreement on this option 2: Possible(?) transmission schemes – for information: No optical fibres have been reserved for the TTC even in the previous scheme => should be reserved asap Point 7 forbidden for fibres in the tunnel (very high radiations) Probably 2 separated fibres for BC and Orbit Estimated price for tx/rx per experiment: 3x5000 € = 30.000 € Technical solutions will be chosen & proposed by the AB/RF if this option 2 is required and accepted Should not take into account the drift with temperature – will be solved presumably internally in the experiments if needed TUNNEL Advantages: Small temperature variation Drawbacks: Radiations on point 3 - ? SURFACE CABLING Advantages: Radiation free Drawbacks: Temperature variation = 6 fibres + spares 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC backbone upgrade options 03/06/2005 TTC backbone upgrade options Options Needs Advantages Drawbacks 1 – TTC centralized at the CCC 1 fibre for BC & Orbit 3 tx crates at the CCC 3 fibres + spares / exp. 3rx crates at the exp. Less fibres No dephasing BC/orbit Central system No support defined New design needed 2 – RF extended up to the experiments BC & Orbit on separated fibres 24tx at the SR4 6 fibres + spares / exp. 6rx at the exp. On-call support possible Tx/rx modules almost defined More fibres (6 per exp + spares) Dephasing BC/Orbit? Conclusion: Asking the AB/RF group to extend the transmission of the RF signals seems to be logical and safer for the system maintenance 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC backbone upgrade options 03/06/2005 TTC backbone upgrade options And now … ? Many technical discussions already with AB/RF and TS/EL Option2 seems to be technically possible (surface or tunnel) Needs agreement from the experiments If the experiments agree on this: Needs agreement from AB Write an EDMS document in collaboration with the PH and AB departments to agree on the principle of the change of responsibilities Propose/define a way of financing this change Technical solutions will be added later according to the AB/RF and experiment constraints and preferences Begin the specification and design of the new “TTCmi” module 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

Proposal: 40 MHz/Frev distributed by AB/RF 03/06/2005 Proposal: 40 MHz/Frev distributed by AB/RF All experiments must agree. We (AB/RF) choose the implementation: Simple point to point analog optical link. Receiver in 160 mm-6U VME cards housed in a VME crate (monitoring of optical power accessible from CCR). No compensation of thermal drifts. 6 ns drift in ½ year for 10 km long link (measured) 100 ps drift in ½ day for 10 km long link (measured) Receiving modules must be located in a room that is easily accessible to our piquet service. Hardware must be paid for by the experiments. 3rd june 2005 Philippe Baudrenghien AB/RF

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 Available Clocks/Orbits TTC upgrade TTC backbone upgrade TTCmi upgrade Fibres/attenuators procurement 2005 commissioning 2006 Test Beam Production news AOB 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 TTCmi upgrade Must follow the backbone upgrade option If option2 is chosen => Required: Signal shaping – RF signals = sinusoidal Clock switching Automatic Using the machine timing events (GMT or BOBR) PLL Fanout Monitoring Form factor Presumably VME64x 6U to fit with RF receivers GMT mezzanine + SBC Quantities 3 per experiments + (many) spares 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 Available Clocks/Orbits TTC upgrade TTC backbone upgrade TTCmi upgrade Fibres/attenuators procurement 2005 commissioning 2006 Test Beam Production news AOB 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

Fibres/attenuators procurement 03/06/2005 Fibres/attenuators procurement For single mode patch-cords (9/125um, ST/PC), the standard available lengths/approx prices are: Simplex 1m 15 Sfr., 2m 16 Sfr., 5m 17 Sfr., 10m 20 Sfr. Duplex 1m 30 Sfr., 2m 32 Sfr., 5m 34 Sfr., 10m 40 Sfr. For single mode attenuators, the standard attenuation levels are: 3dB, 5dB (for connection between TTCex and TTCrq with a 1:16 splitter) 10dB 15dB (for connection between TTCex and TTCrq without a splitter) For caps, the 2 types are: female (transmitter/coupler/receiver side) male (fibre side) 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

Fibres/attenuators procurement 03/06/2005 Fibres/attenuators procurement provided by the TS/EL group – not by the Stores because of administrative complications Some patch-cords, attenuators and caps as describe above will be stored in TS/EL for urgent request, the normal delay you can expect for delivery will be 15 days. To place an order, send a budget code the description of what you need to: Oystein Olsen (Oystein.Olsen@cern.ch) with a copy to Luit de Jonge (Luit.Koert.de.Jonge@cern.ch). If you have some special request (special fibre, connector type, attenuators, etc...), you can as well contact Oystein Olsen or Luit De Jonge. 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 Available Clocks/Orbits TTC upgrade TTC backbone upgrade TTCmi upgrade Fibres/attenuators procurement 2005 commissioning 2006 Test Beam requirements Production news AOB 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 2005 – commissioning Fibres and signal potentially available Possible to receive a clock from a central TTC transmitter crate installed in AB/CO lab Fibres installed from AB/CO to CCC and from CCC to SR Just ask if you need to receive the signal Patch at the CCC Turn on the crate and verify the quality of the transmission 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 2005 – commissioning Material – probably available at the Pool this summer OTDR – negotiations with LUCIOL in course Used for length measurement (2-3 cm precision) Or as a classical OTDR (connection quality, error location..) A priori, 2 would be purchased VFL – Visual Fault Locator Optical Power Meters 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 Available Clocks/Orbits TTC upgrade TTC backbone upgrade TTCmi upgrade Fibres/attenuators procurement 2005 commissioning 2006 Test Beam Production news AOB 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 2006 Test Beam ATLAS, CMS and LHCb requested a 25ns beam during next year test beam ALICE? Please send me the needs you may have in term of TTC installation, so as we can either use the new scheme or the current one. 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 Available Clocks/Orbits TTC upgrade TTC backbone upgrade TTCmi upgrade Fibres/attenuators procurement 2005 commissioning 2006 Test Beam Production news AOB 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 Production news TTCrq – V5: 1st batch delivered in March – 200 boards 2nd batch: 2200 PCB in production New tester board Delivery ~ August TTCex/tx PCB produced Assembly now Store delays (…) – components for 60 modules 20 tx and 30 ex presently being assembled The rest as soon as the components arrive TTCvi 10 already produced but still at EFACEC – needed? The rest mid-june TTCoc DAI still in the purchasing office But should leave CERN soon TTCoc16: 2-3 weeks delivery delays TTCoc32: 6-8 weeks delivery delays 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 Available Clocks/Orbits TTC upgrade TTC backbone upgrade TTCmi upgrade Fibres/attenuators procurement 2005 commissioning 2006 Test Beam Production news AOB 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

TTC Information Meeting / Sophie BARON-PH/ESS 03/06/2005 AOB TTC Clock Gen Prototypes being assembled now Manual switch for internal/external clock 40.078MHz 6 ECL outputs 1 TTL 2LVDS TTCrq back from radiation Regulators were monitored during radiation tests in December (F. Anghinolfi) - OK LVDS drivers to be tested next week GBT13 for SLHC– discussions are beginning 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS

Required to move forward 03/06/2005 Required to move forward Do the experiments… need the Reference Clock? need a common 40MHz clock outside the physics? agree on the principle of asking the AB/RF group to extend the signal transmission? need to standardize more components? need something special for the commissioning? need something special for the 25ns beam next year Available Clocks/Orbits TTC upgrade TTC backbone TTCmi Fibres/attenuators procurement 2005 commissioning 2006 Test Beam 03/06/2005 TTC Information Meeting / Sophie BARON-PH/ESS