Injection Plateau - before beam

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Injection plateau - before beam

	Entry	Exit
Safe Beam Flag	True	True
Beam Presence Flag	False	True
BIS	UP overides	UP overides
Dump	ready for pilot user permit	ready for pilot user permit
TDI	UP OK Out	UP OK Out
TCDQ	UP OK Out	UP OK Out
Kickers	Stand-by	On
Injection BIS	Extraction enabled	Extraction enable

Power Converters

Having spent prescribed amount of time at the pre-injection porch issue command to power converters to ramp to injection level via a PELP. [Command][Settings]
Verify that all power converters have reached the required current and are within tolerance. [Read][Check]

TDI to pilot settings - state change command to TDI state machine (or sub-procedure)

TCDQ to pilot settings - state change command to TCDQ state machine (or sub-procedure)

Enable Injection Kickers - state change command to Kickers

FiDeL

Obtain predictions from FiDeL for multipole behaviour on injection plateau [API to be defined]
Will need to drive a subset of the power converters, in particular, the spool pieces with functions of some sort during the injection plateau. Process prediction to obtain current setting for appropriate corrector circuits. [Settings][Parameter Space]
Correction will be sent to multipole correctors [Settings][Drive][Timing]
Start tracking and correcting for drifts in b1, b2 and b3 (at least) following FiDeL predictions
Display field measurements from RMS [Read][Display]

Parameter Control

To keep energy constant the horizontal orbit correctors will be driven by BFS. This will presumably be via a knob. Check energy SPS v LHC - how? [Settings][Trim][Timing]

Monitoring

Online monitoring of other systems collimators out, TDI parked, RF OK, etc... [Monitor][Check]

Transfer Lines

Before the injection of a full batch one must ensure that all magnets in the transfer line and the LHC machine have their proper settings. If some magnets are not correctly set part of the injected beam can reach either the cold elements of the machine or some parts of the detectors

Here one must keep in mind that the transfer lines use pulsed magnets and ensuring a proper setting of all the magnets requires a well defined checklist and interlock system. In the case of a full batch injection operation errors at the MKI and MSI elements can lead to hardware damage in the LHC machine. Thus, when changing from the pilot bunch injection mode to the full batch injection changes to the injection settings (this includes orbit changes at the TDI) must be excluded by an interlock system.

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