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precycle using precycle supercycle
this'll bring us down to 350 A in the MBs etc
order | time | USER | Supercycle |
1 | 0- 1600 | RAMP | LHC_RAMP_SC |
2 | 0 - 500 (say) | SQUEEZE | LHC_SQUEEZE_SC |
mess around on the pre-injection plateau
create actual settings from designated ramp supercycle (pre-chosen) - going to have to think about harmonic corrections - in principle
the last ramp will contain result of last decay (which would have been incorporated into the supercycle along with snapback).
order | time | USER | Supercycle | Source supercycle | ACTIVE |
0 | ACT-INJECTION | LHC_ACT_INJECTION | LHC_RAMP_SC | Y | |
1 | 0- 1600 | RAMP | LHC_RAMP_SC | ||
2 | 0 - 500 | SQUEEZE | LHC_SQUEEZE_SC |
Set machine to actual settings - injection = start ramp for nearly everything
Injection plateau - actual trims as required (orbit, tune, chromaticity, collimators, RF) - harmonic correction as required.
prepare to ramp - incorporation of any trims, FIDEL for snapback
load ramp - more trim please or esle you have re-incorporate
create actual settings for flat top (during ramp) - this should match end of ramp by construction.
mess around on flat top
order | time | USER | Supercycle | Source supercycle | ACTIVE |
0 | ACT-INJECTION | LHC_ACT_INJECTION | LHC_RAMP_SC | ||
1 | 0- 1600 | RAMP | LHC_RAMP_SC | ||
1600 | FLATTOP | LHC_ACT_FLATTOP | LHC_RAMP_SC | Y | |
2 | 0 - 500 | SQUEEZE | LHC_SQUEEZE_SC |
1. choose breakpoint time
2. update hypercycle table
3.
incorporate flat top trims into squeeze
4. load power converter functions
5. tell power converter where we are going
6. update timing table
7.
Create actual settings for stop in squeeze,
8. send timing event
time | USER | Supercycle | ACTIVE |
0 | ACT-INJECTION | LHC_ACT_INJECTION | |
0- 1600 | RAMP | LHC_RAMP_SC | |
1600 | FLATTOP | LHC_ACT_FLATTOP | |
0 - 500 (say) | SQUEEZE | LHC_SQUEEZE_SC | Y |
361 | ACT-SQUEEZE | LHC_ACT_SQUEEZE |
run through to breakpoint in squeeze
time | USER | Supercycle | ACTIVE |
0 | ACT-INJECTION | LHC_ACT_INJECTION | |
0- 1600 | RAMP | LHC_RAMP_SC | |
1600 | FLATTOP | LHC_ACT_FLATTOP | |
0 - 500 (say) | SQUEEZE | LHC_SQUEEZE_SC | |
250 | ACT-SQUEEZE | LHC_ACT_SQUEEZE | Y |
trim, incorporate, create actual settings for end squeeze, carry on to end
time | USER | Supercycle | ACTIVE |
0 | ACT-INJECTION | LHC_ACT_INJECTION | |
0- 1600 | RAMP | LHC_RAMP_SC | |
1600 | FLATTOP | LHC_ACT_FLATTOP | |
0 - 500 (say) | SQUEEZE | LHC_SQUEEZE_SC | |
500 | ACT-SQUEEZE | LHC_ACT_SQUEEZE | Y |
Can either collide and go into physics or choose another squeeze which of course has to be compatible optics wise with where ever we are.
Could check at hypercycle update time where or not the optics match (via optics table). Would also have to check that all settings are continuous.
order | time | USER | Supercycle | Source supercycle | ACTIVE |
0 | ACT-INJECTION | LHC_ACT_INJECTION | LHC_RAMP_SC | ||
1 | 0- 1600 | RAMP | LHC_RAMP_SC | ||
1600 | FLATTOP | LHC_ACT_FLATTOP | LHC_RAMP_SC | ||
2 | 0 - 500 | SQUEEZE | LHC_SQUEEZE_SC | ||
500 | ACT-SQUEEZE | LHC_ACT_SQUEEZE | LHC_SQUEEZE_SC | ||
3 | 0-300 | SQUEEZE | LHC_ANOTHERSQUEEZE_SC | Y | |
253 | ACT-SQUEEZE | LHC_ACT_SQUEEZE | LHC_ANOTHERSQUEEZE_SC |
etc.
Control of the main beam parameters implying fast, accurate control in terms of appropriate parameters in both steady state (physics coast) and during dynamics phases (injection, ramp etc.)
Injection
Drive the machine from pre-injection porch to injection level
Preloaded settings for RF systems: longitudinal and transverse feedback etc. Batch dependent
Preload settings for BI. Batch and beam dependent.
play the injection plateau: 450 GeV injection settings and functions to take through the persistent current decay until we decide to ramp and face snapback.
check range of insertion quad power converters at 450 GeV
anticipate b1 swing with correctors,
Ramp
baseline ramp
Ramp from E initial to E final. e.g. 450 GeV to 2 TeV, 2 TeV to 3 TeV
RF: frequency swing, voltage
Squeeze
Plus, as usual: trims, plus on-line model...
Machine history will be important and this history should be group into appropriate classes to aid post-run analysis and feedforward.
State changes of hardware should be recorded.