1. Sept-2003Jean-Claude BAU1 SEQUENCING AT THE PS Let’s take a quick tour.

2. Sept-2003Jean-Claude BAU2 Overview What is the sequencing? Terminology The Telegram The basic period The cycle The beam Strong/Loose coupling Normal/Spare The BCD The MTG The BCD-Set Timing events MTG diagnostic MTG Hardware

3. Sept-2003Jean-Claude BAU3 What is the sequencing? PS is a network of interconnected accelerators with particle beams passing from one machine to another at beam transfer rendez-vous points. Manage accelerator cycles where they receive the beam, accelerate or decelerate it. Coordinate the beam transfer rendezvous points of the PS accelerators network.

4. Sept-2003Jean-Claude BAU4 Terminology: The Telegram It is a set of attributes(group)/values (PARTY=PROTON, DEST=FTS,….) describing what are accelerator do. Describe the present and the next period/cycle Telegrams drive the PPM

5. Sept-2003Jean-Claude BAU5 Terminology: The basic period The basic unit of time use to define cycles. Characterized by : a duration of 1.2s (Can be changed) a telegram (32 groups maximum)

6. Sept-2003Jean-Claude BAU6 Terminology: The CYCLE Set of basic period Length=n * BasicPeriod (1.2s) Static telegram groups Their values don’t change within a cycle (USER=SFTPRO) Dynamic telegram groups Their values can change from a basic period to another within a cycle (BPNM=1) USER=EASTA, PARTY=PROTON,BPNM=1 EASTA Cycle USER=EASTA, PARTY=PROTON,BPNM=2 Basic periods

7. Sept-2003Jean-Claude BAU7 Terminology: The CYCLE(2) Representation Cycle of 1 BP Cycle of 2 BP SFTPRO EASTC USER group value

8. Sept-2003Jean-Claude BAU8 Terminology: The BEAM Link cycles together (same/different accelerators) When a beam is played by MTG, all cycles of the beam will be play. Defined by : Set of cycles Phase between cycles

9. Sept-2003Jean-Claude BAU9 Terminology: The BEAM (2) Representation EASTA EASTC PSB CPS Phase

10. Sept-2003Jean-Claude BAU10 Strong and Loose coupling Strong Coupling Same supercycle length Cycles are strongly connected to create a beam Free supercycle phase Loose Coupling Free supercycle length RT synchronization with machine in strong coupling for beam injection Supercycle can be stopped Occasional injection

11. Sept-2003Jean-Claude BAU11 Terminology: NORMAL/SPARE Maximize accelerator up-time.

12. Sept-2003Jean-Claude BAU12 Terminology: NORMAL/SPARE(2) Representation ZERO PSB CPS SFTPRO ISOGPS SFTPRO Normal Spare

13. Sept-2003Jean-Claude BAU13 Terminology: Beam Coordination Diagram Define the organization of the beams Beam positions Normal/Spare relationship Built using editors Strong coupling BCD editor Cycle/Beam/ Compound Operation/BCD builder ADE editor The BCD is the result of the merging of BCDs produces by the two editors.

14. Strong Coupling BCD Editor

15. BCD Editor: Rule checker

16. Bcd manager

17. Sept-2003Jean-Claude BAU17 FiDo programs MTG integrates the compiler and the interpreter. Can be downloaded in real-time

18. Sept-2003Jean-Claude BAU18 The BCD-Set Set of BCDs 4 Levels Played BCD selected by external conditions BCD change immediately at the end of the supercycle

19. Sept-2003Jean-Claude BAU19 Timings events (CTIM) Oracle description (Mapping Event Code  Name) Declare as CTIM equipment module Machine event Virtual events (PPM) Key events Define the phase between accelerator Drive TG8 timings and interrupts for RT task Validate Telegrams (RPLS)

20. CTIM (2)

21. Sept-2003Jean-Claude BAU21 Timing events (CTIM) (3) Controllable by knobs in real-time Virtual event Key events

22. Sept-2003Jean-Claude BAU22 The MTG Inputs BCDs External conditions Timing description (CTIM) External timings FiDo programs Outputs Telegrams events Timing events Time events...

23. Sept-2003Jean-Claude BAU23 MTG diagnostic

24. Sept-2003Jean-Claude BAU24 MTG Hardware VME crate 1 VMTG card / machine Telegrams on all cables Timing events not distributed on all cables to optimize cable bandwidth Diff. C Train on cables Master/Slave MTG