timing upgrades after ls1

Jean-Claude BAU BE-CO-HT 1

Timing upgrades after LS1


Outline

Timing for frond-end computersCBCM (LHC injector chain)

◦Dedicated central timing for AD◦New FESA interfaces◦New SPS Start/Stop management◦New SPS coast management◦New SPS energy saving management◦Master/Slave mechanism removed◦Other changes◦Planning

Conclusion


Timing for front-end computers

Timdt timing library ◦Available since mid 2012◦Integrated in FESA 3◦Compatible with TGM library in a same front-

end◦Need a specific startup sequence

TimService instead of Get-tgm-tim & Timload TimService provides all services for timdt & TGM

Local timing renovation◦Replacement of all TG8s by CTRs◦Part of the ACCOR project


CBCM: Dedicated central timing for AD

AD removed from the LIC central timingAD will have its own central timing located in

the building 193Needed for the future ELENA deceleratorBeam will be negotiated with their rdv points

(PS extraction and AD injection)◦Synchronization negotiated in absolute time◦PS extraction and AD injection can move

independently◦No changes in the way the PS beams for ADE are

declared in a BCD.Deployment for mid-march 2014


CBCM: New FESA interfaces

The CTIM GM class has been migrated to 4 FESA 3 classes:◦ CTIM_Machine (Machine phase)◦ CTIM_Virtual (Events family)◦ CTIM_Key (Events sent on the GMT cables)◦ CTIM_Asynchronous (Triggered events)

The MTG GM class has been migrated to 2 FESA 3 classes:◦ MTG_ExCond (External conditions)◦ MTG_CCVGroup (Control of a Telegram group)

The CYPAR GM class has been migrated to the CycleParam FESA 3 class

All the new FESA device names will have the suffix "-CTML" instead of "-CTM“ (ex: EC.128-CTM EC.128-CTML)

Consult the wiki pagehttps://wikis/display/CBCM/User+Doc#UserDoc-CBCMUSERINTERFACES to know the relationship between the GM and new FESA classes

https://wikis/display/CBCM/User+Doc


CBCM: New SPS Start/Stop management

ROCS replaced by the FGCD frameworkPulse start/stop will be managed by the

FGCs at any place in a supercycle Pulse start/stop synchronized with the

central timingThe pulse start/stop BCDs will be not

required anymore in a sequence.


CBCM: New SPS COAST management

The FGCs will be able to suspend/recover the execution of a function. It will be driven by the timing.

To be coastable, a SPS cycle must be :◦ Declared as coastable◦ To be alone in the supercycle◦ The same cycle must be declared in normal and spare. ◦ The normal must be linked to the PS but not the spare

The LIC central timing ◦ will go in coast on demand◦ will play the normal or the spare depending on the coast state

Normal for coast prepare, ‘spare’ for coast and coast recover

During a SPS coast◦ Impossible to change the sequence/BCD being executed◦ Impossible to change the SPS supercycle

BCDs for coast prepare, coast and coast recover are not needed anymore in a sequence


CBCM: New SPS energy saving management

The full economy mode will be able to start at any place in the supercycle

Partial economy mode will be controlled only by the BCT which measures the beam in the SPS injection line.

All these new SPS features are described in a document (draft state)


CBCM: Master/Slave mechanism removed

Master/Slave mechanism was used to upgrade the LIC central timing in real time◦Functionality not used since LHC◦Upgrades made only during technical stops or

shutdownsDisruption of the timing distribution

during an upgradeFast upgrade rollback is implementedSignificant simplification of the LIC central

timing◦2 front-ends instead of 5


CBCM: Other changes

All the SPS legacy timing events have been removed ◦OX.xxxx-CT, OIX.xxxx-CT, OEX.xxxx-CT

Ion & Proton at the same time in the SPS◦Ion for North area & proton for other

destinations◦The central timing will help to protect the North

area from receiving protons


CBCM: Planning

After mid-March, smooth upgrades will be necessary to tweak the central timing systems.

Description Date

LIC central timing - Phase 1- Hardware renovation- FESA classes

26 November 2013

LIC central timing - Phase 2- AD removed from LIC- New SPS facility

Mid-March 2014

AD central timing Mid-March 2014


Conclusion

No revolution but significant improvements to the Operation

No new constraints added to the Operation

Some complexities have been removed◦Simplifies diagnostics◦Increases the reliability

timing upgrades after ls1

Documents