22 March 2012Dietrich Beck - BEL General Machine Timing System @ FAIR Just a few slides….

22 March 2012 Dietrich Beck - BEL

General Machine Timing System @ FAIRGeneral Machine Timing System @ FAIR

Just a few slides….


Timing Systems @ FAIRTiming Systems @ FAIR

General Machine Timing System• based on White Rabbit• fairly cheap: € 800,- SPEC board• sub-ns synchronization• distribution of

• (clock)• time-stamps• timing-events

• BEL group

• one global timing master• clock derived from BuTiS

Talk T. Fleck, FAIR Technikforum

Bunch phase Timing System (BuTiS)

• invest € 15k per receiver station• ps precision (100ps/km accuracy)• distribution of

• clocks!!!• NO time-stamps at FAIR• NO timing-events

• HF group

• one global BuTiS center

Talk P. Moritz, FAIR Technikforum

Remark: If you are interested time-stamps, you need White Rabbit.

If you are interested in the most accurate clocks, you need BuTiS.

If you are interested in both, you need both.


General Machine Timing System (GMT) @ FAIRGeneral Machine Timing System (GMT) @ FAIR

• parallel execution of beam production chains

• cycles: 20ms to hours

• trigger and sync. equipment actions

• 1 µs precision in 99% of all cases

• few ns precision for kickers

• (few ps for rf-systems: BuTiS)

• many rings

• > 2000 devices connected to timing system

• large distances

• robustness: lose at most one message per year


GMT – IdeaGMT – Ideaset value

(schedule)

set values

(ramp)

1. SM transmits set values2. DM executes schedule by

broadcasting timing events3. FTRN schedule actions4. timely execution of action

(here: send IRQ to CPU)5. Generate ramp via

equipment interface

timing events

LSA


GMT – InterfacesGMT – Interfaces

FrEC


GMT – Data MasterGMT – Data Master

UNILAC

SIS18 SIS100 HESR

beamline


Settings Management – Data MasterSettings Management – Data Master

• SM generates set value for DM: schedule and alternatives (decision tree, domain specific language)

• SM sends set value to FESA class of DM• FESA class uses a library for on-the-fly

– source-code generation for soft-CPUs

– cross-compilation of soft-CPU codes

– uploading codes to soft-CPUs

codes specific to schedule rather simple code


Simple Machine Specific Soft-CPU CodeSimple Machine Specific Soft-CPU Code

while (state == PRODUCTION) {

/* one cycle: BPC1 */ if (IL(BPC1) != OK) cycle1_planB(); else { waitsync(BPC1, INJ_SIS100, timeout); cycle1(); }

/* one cycle: BPC2 */ if (IL(BPC2) != OK) cycle2_planB(); else { waitsync(BPC2, INJ_SIS100, timeout); cycle2(); }

/* repeat cycle: BPC2 */ if (IL(BPC2) != OK) cycle2_planB(); else { waitsync(BPC2, INJ_SIS100, timeout); cycle2(); }

}

not shown:

• beam processes

• error handling

• beam request on/off

• IL check during cycle execution

SIS100:


201220142017

70 m

• no loosely coupled machines

• 1 timing master

• 2 switch layers at TM

• 4 cables to each building

• then: distribution to floors

• then: distribution to rooms

• redundant links between switches

• optical or copper links to nodes

• 2000-3000 nodes

• 5 layers of switches (18 ports) in total


Timing Master to Nodes – Message TypesTiming Master to Nodes – Message Types

• Timing-Events – synchronizing actions

• Info-Telegrams – transmission of (float)-values, e.g. beam-intensity

• “Action-Events”– Commit – switching between FrEC registers containing

different set values.– Post-Mortem – “freeze” or “unfreeze” ring buffers in FrECs– Reset – reset a crashed FrEC – Rollback – “undo”?


Nodes to Timing Master – Message TypesNodes to Timing Master – Message Types

• Forbidden!

• … except a few specific cases…

• Fast beam request from local areas (experiments…) via dedicated local interface units managed by BEL

• Bunch-to-bucket transfer (transfer between ring machines)


Network and NodesNetwork and Nodes

• Network: Talk by Maciej and Cesar

• Nodes: In-Kind contribution by Slovenia


The PlanThe Plan

• Finalize “WR Starter Kit”

• Timing System v0.0 – experimental, but 24/7 (2012)

• Timing System for p-Linac test in Saclay (Beginning 2013)

• Test: replacing MIL-timing of SIS18 + ESR ( 2014)

• …

22 March 2012Dietrich Beck - BEL General Machine Timing System @ FAIR Just a few slides….

Documents

Transcript of 22 March 2012Dietrich Beck - BEL General Machine Timing System @ FAIR Just a few slides….