LHC - initial commissioning to 5 TeV

Time assigned not necessarily contiguous
Start with nominal cycle

Phase 1: Injection and First Turn

	beam 1	beam 2	Fast track	Total Time both rings
Commission TI8 & TI2 end transfer line, injection region, beam to TDI	12	12	24	24
Commission trajectory acquisition and correction, thread beam - first turn, energy matching	24	24	48	48
Commission Beam Loss Monitor system - phase 1			parasitic	12
Optics measurements, kicks, trajectory, polarity checks	12	12	24	24
Aperture checks			skip	16
Momentum aperture			if problem	6
Setting up of injection machine protection			skip	12
Completed in 2008 injection tests			4 days	142 hours 6 days

Phase 2: Circulating beam

	beam 1	beam 2	fast track	Total Time both rings
Adjust chromaticity, close trajectory, obtain closed orbit	12	12	24	24
Integer tunes, fractional tunes, phase advance per turn	8	8	16	16
Energy matching and correction, B-sps, f-lhc, B-lhc - both rings, RF capture	16	16	32	32

Completed for beam 1 in September 2008 - to be revisited.				72 hours 3 days

Phase 3: 450 GeV - initial

	beam 1	beam 2	fast track	Total Time both rings
RF: Beam control loops (Phase, Synchro, Radial). Tuner loop, RF Feedback loop. Synchronisation			24	24
Test control and correction (orbit, BPM & corrector polarity, cabling, control system, software, procedures, …).	12	12	24	24
Commission transverse diagnostics - Tune measurement [FFT]. Adjust tunes, orbit, chromaticity, coupling.	12	12	24	24
Linear optics checks: check trajectory versus kick, phase advance,	12	12	24	24

Commission beam loss monitors - acquisition, display etc. no connection to BIC for the moment - phase 2			parasitic	12
Commission beam dump - phase 1			24	24
Commission beam interlock system with beam - phase 1. BIC to dump with beam. Basic tests with beam.			assume ok from checkout	8
Commission BCTs: lifetime measurement			parasitic	-
Cycle machine - reinject
			4 days	5 days

Phase 4: 450 GeV - detailed

Measurement program

		beam 1	beam 2		Total Time both rings
BT	Matching between TI8/Ti2 and ring. Pilots.			skip	8
AP/OP	Measure beta beating. Determination of Twiss functions. Need to establish standard procedure to identify and correct all local sources of phase advance errors.			16	16
AP/OP	Revisit mechanical aperture checks. Bumps - check the aperture in the cold machine is free and has the expected size			16	16
AP/OP	Field quality checks. Check design fields, field harmonics, fields due to offsets between beam and magnet			skip unless obvious problem	16
AP/OP	Momentum aperture			8	8
AP/OP	IR bumps, check aperture in IRs			skip	6
OP/AP/MA	Transfer functions (separation dipoles etc.)			8	8
OP	Reproducibility after cycling machine. Effect of magnetic cycle, reproducibility, field model			let this come naturally	16
OP/AP/BDI	Quench levels and BLM response			skip	24

				2 days	118 hours 5 days

Commission

		beam 1	beam 2		Total Time both rings
RF	Loop adjustment			8	8
RF	Transverse damper			skip	16
RF	Longitudinal feedback	4	4	8	8
BI	Transverse profile monitors			parasitic	8
BI	Commission beam loss monitors - phase 2, calibration, thresholds. Commission the BLM's around the collimators. Link to BIC	8	8	mimimum 16	16
BI	Tune - PLL			parasitic	8
OP	Closed orbit feedback			skip	16

COL	Adjustment of collimators, orbit stabilization, test positioning procedures, beam loss monitors. Positioning of jaws with respect to closed orbit. Establish a coarse set of collimator settings. Looking a minimum set of primaries in first instance. This for basic protection up the ramp.			mimimum protection scheme 16	36
BT	TDI. Position, angle, interlocks	4	4	8	8
BT	TCDQ orbit at 6, position, angle, interlocks	8	8	16	16

MPS	FMCM			comm without beam	4
MPS	Test Safe LHC Parameters: Safe Beam Flag, Beam Presence Flag, Safe LHC mode, Safe Energy, Safe Squeezing Factor			8	8

				3 days	152 hours 7 days

Phase 5: two beam operation

		fast track	Total Time both rings
OP	SPS - switch rings - TI8/TI2 in parallel	should have been done before	-
OP/BT	Commission separation bumps. Closure of bumps. Check aperture. Check injection region.	16	16
OP/AP	Effect of bumps - dispersion, non-closure	skip or get above	8
BI	Beam parameters: Q split, Q' split, coupling, Beam instrumentation: BLMs, BPMs cross talk etc.	skip	8
OP	Control system...feedback, orbit correction, orthogonality etc., energy matching - 2 rings	8	8
		1 day	2 days

Phase 6: snapback - ramp to around 1 TeV

		beam 1	beam 2		Total Time both rings
OP/MA	Incorporate FiDeL predictions, ramp mechanics: RF, Power Converters. First ramping attempts with single beam. cycling - all mechanics should have been tested before.	24	should follow	24	48
BI	Commission beam instrumentation acquisition in ramp: orbit, tune, chromaticity, coupling	8	8	16	16
OP	Orbit feedback			8	8
PO	Tracking between sectors - first look	8	8	16	16

				3 days	4 days

Phase 7: ramp - single beam - both rings

				fast track	Total Time both rings
OP/MA	Incorporate FiDeL predictions, mechanics. Load RF, Power Converters				24
BI	Commission beam instrumentation acquisition in ramp: orbit, tune-PLL, chromaticity, coupling				16
OP	Orbit feedback				8
PO	Tracking between sectors				24
BT	Commission beam dump in ramp				48
BI	Commission BLMs - energy tracking of thresholds				8
RF	Commission RF: frequency, voltage, dampers				16
OP	Measurements at intermediate energy				16
OP/AP	Measurements at 7 TeV				24
					8 days

Phase 8: ramp - both beams

		Total Time both rings
OP	Incorporate FiDeL predictions, mechanics. Load RF, Power Converters	8
OP	Commission separation bumps in ramp	8
OP	Orbit feedback	8
PO	Tracking between sectors	8
BT	Commission beam dumps in ramp - multiple ramps	16
	Check RF, BLMs, Instrumentation, correction strategies
OP/AP	Measurements with 2 beam at 7 TeV	24

		3 days

Phase 8: 9 TeV set-up for physics

		Total Time both rings
COLL	Collimation setup	24
OP	Separation bump reduction, interaction with orbit feedback: points 1 & 5	16
BI	Commission luminosity monitors	8
OP	Establish collisions	8

		2 days

ML May 2006