CERN Accelerating science

precycle using precycle supercycle

this'll bring us down to 350 A in the MBs etc

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).

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

prepare to squeeze to a breakpoint in the squeeze

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

run through to breakpoint in squeeze

trim, incorporate, create actual settings for end squeeze, carry on to end

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.

etc.

Settings Management

• settings generation: for injection, ramp & squeeze
• trim: orbit bumps, phase advance, energy, multipoles
• archive/snapshots
• specialist equipment settings

Parameter control

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.)

• The system shall allow definition of high level parameters that map on to one or more low level control variables
• The high level parameters maybe programmed as a function of time and then invoked on request.
• Will allow settings management of collimators, TDI, kickers, septa 

Settings Generation:

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

• Squeeze (IP, beta initial, beta final)

Trims

Plus, as usual: trims, plus on-line model...

• Trim: Incorporation philosophy, persistent versus geometric correction & how to deal with them.
• Trim: Scaling, accumulation, and smoothing out of errors & corrections (e.g. orbit). Time & history dependency of errors...
• Trim: tune, b1, optimization of lifetime, Q, Q'. 
• Deterministic 1 Hz knobs,

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.